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Yamaha

July 12, 2012

Early History

(from an anonymous 1971 American motorcycle book)

Yamaha Motor Company, Ltd. was established in 1955 as a small subsidiary of Nippon Gakki, Ltd., the world’s largest piano manufacturer. The firms entrance into the field of motorcycle production was hardly considered a threat by the giants of the industry, but after the first model was introduced and marketed later that same year, they quickly realized that Yamaha would soon be a formidable competitor.

1955 Yamaha YA-1

The first Yamaha was designated YA-1 and dubbed the “Red Dragonfly”. It was styled after the famous BMW and was powered by a single cylinder 125cc two stroke engine. This first effort was such a success that by 1959, the company was offering sports and utility models in 125, 175, and 250cc displacements. In 1960, their phenomenal growth continued, multiplying their original investment nearly thirty times and expanding their product line to include mopeds, boats, and outboard motors.

By that time, Asian export market had already proven very profitable, but it wasn’t until the early-to-mid-1960’s that foreign sales really began to soar: America discovered the Japanese motorcycle and suddenly the demand for them became overwhelming.

The motorcycle industry’s heated competition for this new market was eventually carried to the European Grand Prix circuit, where Yamaha and their rivals locked horns in a furious racing and development battle. Factory engineers worked frantically to provide faster and more powerful machines for the Grand Prix effort, and as a result, two-stroke motorcycle technology advanced by leaps and bounds. The Yamaha racing team won five world championships.

After development and thorough testing the products of this racing program were employed on production machines: mainly, the rotary valve in 1961, Autolube oil injection in 1963 and the five-port (twin intake port) cylinder in 1968, and the reed valve in 1973.

Meanwhile Yamaha Motor Company, Ltd. continued to grow – building nine new plants in Japan, Taiwan, Mexico, Costa Rica, Equador, and Guatemala. In addition to achievement awards in motorcycle engineering, the company also received great acclaim for their design of the Toyota 2000 GT in 1966, and the introduction of Yamaha snowmobiles in 1968.

Most recently, the firm has built a new test facility in Japan and introduced a complete line of off-road Enduro and Motocross motorcycles. They have also expanded their street motorcycle offering by applying their Toyota 2000 GT experience to the construction of Yamaha’s first four stroke model-the 1970-1971 XS1.

The Yamaha trademark of three crossed tuning forks has now become a familiar sight all over the world and serves as a subtle reminder of the firm’s musical origin. Their motorcycle products currently range from the 1971 58cc Mini-Enduro to racing’s “dynamic duo”, the 1971 250cc TD and 350cc TR road racers. There is a model to suit every enthusiast and each one reflects, as Yamahas always have, the ever-growing interests of the motorcycling public. 

 


Yamaha (US models) 1962-1992

Here are listed all the vintage Yamaha motorcycle and scooter models that sold new in the USA. Worldwide there are many more Yamaha models. Some of those are the same as US models, and some are different. Here the focus is on the smaller 50-80cc Yamahas that are like mopeds. Many of those small Yamahas are also shown in photos and explained.  

Yamaha 1964-67

Yamaha 1964-67

1962 Yamaha
0055  MJ2 Omaha (55cc rotary valve 3-speed)
0055  MJ2T Trail 55 (55cc rotary valve 3-speed)
0250  YD3 Sport 250 (246cc piston-port twin 4-sp)
0250  YDS2 Super Sport (246cc piston-port twin 4-sp)
0250  TD1 (Road Racer) (246cc piston-port twin 5-sp)

1963 Yamaha
0055  MJ2 Omaha 55 (55cc rotary valve 3-speed)
0055  MJ2T Trail 55 (55cc rotary valve 3-speed)
0080  YG1T Trailmaster (73cc rotary valve 4-sp)
0250  YD3 Sport 250 (246cc piston-port twin 4-sp)
0250  YDT1 Touring (246cc piston-port twin 4-sp)

1964 saw the introduction of Autolube oil injection on all models. With the new lubrication system and other improvements, the YJ1 became the YJ2, the YG1K became the YG1K (same) and YGS1T, the YDS2 became YDS3C. 

1964 Yamaha
0050  U5 Newport (50cc rotary valve 3-sp auto-clutch)
0055  MJ2 Omaha 55 (55cc rotary valve 3-speed)
0055  MJ2T  Trail 55  (55cc rotary valve 3-speed)
0060  YJ2 Campus 60 (58cc rotary valve 4-speed)
0080  MG1T Trail 80 (73cc rotary valve 4-speed)
0125  YA5 Santa Barbara (123cc rotary valve 4-speed)
0250  TD1B (Road Racer) (246cc piston-port twin 5-sp)

 

With the addition of electric starting, the U5 and YA5 became U5E and YA6.

Yamaha 1964-72

Yamaha 1964-72

1965 Yamaha
0050  U5L, U5E Newport (50cc rotary valve 3-sp auto-clutch)
0060  YJ2 Campus 60 (58cc rotary valve 4-speed)
0080  MG1T Omaha 80 (73cc rotary valve 4-speed)
0080  YG1T/YG1TK Trail 80 (73cc rotary valve 4-sp)
0125  YA6 Santa Barbara (123cc rotary-valve 4-speed)
0250  YDS3 Super Sport (246cc piston-port twin 5-sp)
0250  YDS3C Catalina 250 (246cc piston-port twin 5-sp)
0305  YM1 Catalina 305 (305cc piston-port twin 5-sp)

1966 Yamaha
0050  U5E Newport 50 (50cc rotary valve 3-sp auto-clutch)
0080  YGS1 Sport 80 (73cc rotary valve 4-speed)
0080  YGS1T Trail 80 (73cc rotary valve 4-speed)
0100  YL1 Twin Jet 100 (98cc piston-port twin 4-sp)
0125  YA6 Santa Barbara (123cc rotary valve 4-speed)
0125  YA6B Santa Barbara (123cc rotary valve 4-speed)
0250  YDS3 Super Sport (246cc piston-port twin 5-sp)
0250  YDS3C Catalina 250 (246cc piston-port twin 5-sp)
0305  YM1S Catalina Sport (305cc piston-port twin 5-sp)

1967 saw new models YL2, YCS1, YR1 and primary kickstarting on some models. With the addition of electric starting, the YL1 became the YL1E and the YDS3C became the DS5. The new YL2C and YCS1 were also equipped with electric starters.

1967 Yamaha
0050  U5E Newport 50 (50cc rotary valve 3-sp auto-clutch)
0100  YL1E Twin Jet 100 (98cc piston-port twin 4-sp)
0100  YL2 Rotary Jet 100 (97cc rotary valve 4-speed)

Yamaha 1968-73

Yamaha 1968-73

0100  YL2C Trailmaster (97cc rotary valve 4-speed)
0180
  YCS1 Bonanza 180 (180cc piston-port twin 5-sp)
0250
  DS5 Yamaha 250 (246cc piston-port twin 5-sp)
0250  TD1C (Road Racer) (246cc piston-port twin 5-sp)
0350  YR1 Gran Prix 350 (348cc piston-port twin 5-sp)

1968 saw the introduction of a new 5-port cylinder design on the DT1, YAS1C and YR2C. (5-port means 2-intake ports, 2-transfers, 1-exhaust) With the addition of electric starting and other changes, the YG1K and YGS1T became the YG5T, and the YCS1 became the YCS1C.

1968 Yamaha
0080 YG5T Trailmaster 80 (73cc rotary valve 4-speed)
0100  YL2CM Trailmaster (97cc rotary-valve 4-speed)
0125  YAS1C Scrambler 125 (124cc piston-port twin 5-sp)
0180  YCS1C Bonanza 180 (180cc piston-port twin 5-sp)
0250  DS5 Scrambler 250 (246cc piston-port twin 5-sp)

0250  DT1 Enduro 250 (246cc piston-port 5-speed)
0350  YR2 Gran Prix 350 (348cc piston-port twin 5-sp)
0350  YR2C Scrambler 350 (348cc piston-port twin 5-sp)

1969 saw new models AT1 (electric start), CT1, L5T (electric start and two-range, 3-speed transmission. The YA1SC became the AS2C and the YG5T became the G5S (without electric starting). The DS5 of 1967 evolved into the DS6C (without electric start). The YR2C became the newly styled R3. DT1 became DT1B. The five-port cylinder design was now used on all of the piston-port (piston-controlled induction) engines. Rotary (disc) valve engines do not have any intake ports in the cylinder at all, so the new split intake port design did not apply to them.

1969 Yamaha G5-S

1969 Yamaha
0080 G5S Yamaha 80 (73cc rotary valve 4-speed)
0100  L5T Trail 100 (97cc rotary-valve 2 x 3 speed)
0125  AS2C Scrambler (124cc piston-port twin 5-sp)
0125  AT1E Enduro 125 (123cc piston-port 5-speed)
0125  AT1M Enduro 125 (123cc piston-port 5-speed)
0175  CT1 Enduro 175 (171cc piston-port 5-speed)
0250  DS6C Scrambler (246cc piston-port twin 5-sp)
0250  DT1B Enduro (246cc piston-port 5-speed)
0250  DT1S Enduro (246cc piston-port 5-speed)
0350  R3 Sport 350 (348cc piston-port twin 5-speed)

1970 saw new models HS1, HT1, RT1, XS1 and the introduction of Keystone-type (trapezoidal or slanted-top) piston rings. The YCS1C and R3 were completely revamped to produce the CS3C and R5. With new styling and internal improvements the G5S, AT1, L5T, CT1, DT1B and D6SC became the G6S, AT1B, L5TA, CT1B, DT1C and DS6B. The five-port cylinder was also used on the new HS1, HT1, and RT1.

1970 Yamaha
0080  G6S Yamaha 80 (73cc rotary valve 4-speed)
0090  HS1 Twin Street (89cc piston-port twin 5-speed)
0090  HT1 Enduro 90 (89cc piston-port 5-speed)
0100  L5TA Trail 100 (97cc rotary-valve 2 x 3 speed)
0125  AT1B Enduro 125 (123cc piston-port 5-speed)
0125  ATM1B Enduro (123cc piston-port 5-speed)
0175  CT1B Enduro 175 (171cc piston-port 5-speed)
0200 
CS3C Scrambler (195cc piston-port twin 5-sp)
0250  DS6B Scrambler (246cc piston-port twin 5-sp)
0250  DT1C/DT1CMX (246cc piston-port 5-speed

1971 Yamaha JT1 Mini Enduro
Notice how on a rotary valve two-stroke,
the carburetor is hidden behind the
cover where the clutch normally is.

0250  TD2 (Road Racer)
0350  TR2 (Road Racer)
0350  R5 Sport 350 (347cc piston-port  twin 5-sp)
0360  RT1/RT1M Enduro (351cc piston-port 5-sp)
0650  XS1 (4 stroke twin) (653cc SOHC 5-speed)

1971 saw the new JT1 Mini Enduro. All 1971 models carried a last letter designation change from their 1970 versions. (Some end letters increased, like B to C, and others decreased, like C to B) For example, the HT1 of 1970 became the HT1B of 1971, even though very few changes were made.

1971 Yamaha 
0060  JT1 Mini Enduro (58cc rotary valve 4-speed)
0080  G6SB Yamaha 80 (73cc rotary valve 4-speed)
0090  HS1B Twin Street (89cc piston-port twin 5-sp)
0090  HT1B Enduro 90 (89cc piston-port 5-sp)
0090  HT1BM (off road) (89cc piston-port 5-sp)

0125  AT1C Enduro 125 (123cc piston-port 5-speed)
0125
  AT1MX (Motocross) (123cc piston-port 5-speed)
0175  CT1C Enduro 175 (171cc piston-port 5-speed)
0200  CS3B Scrambler (195cc piston-port twin 5-speed)
0250  DT1E Enduro 250 (246cc piston-port 5-speed)
0250  DT1MX (Motocross) (246cc piston-port 5-speed)

0250  TD2B (Road Racer)
0350  TR2B (Road Racer)
0350  R5B Sport 350 (347cc piston-port  twin 5-speed)
0360  RT1B/RT1MX Enduro (351cc piston-port 5-sp)
0650  XS1B (4 stroke twin) (653cc SOHC 5-speed)

1972 saw the introduction of reed valve induction on the AT2, CT2, DT2, RT2, and the new LT2 and U7E. The HS1 was enlarged to 97cc, restyled and designated LS2. The DS6 was completely revamped and designated DS7. The JT1 Mini Enduro was made available in either street trim (JT2L) or off-road trim (JT2M). The XS1 was fitted with a front disc brake and electric starting, and re-designated XS2.

1972 Yamaha U7E

1969 to 1972 Yamaha model names (except U5 and U7) had the engine size (cc) in the first letter J=60, G=80, H=90, L=100, A=125, C=175 or 200, D=250, R=350 or 360, X=650, followed by the bike type T=Trail, S=Street, M=Motocross. 

1972 Yamaha
0160  JT2L Enduro 60 (58cc rotary valve 4-speed)
0160  JT2M Mini Enduro (58cc rotary valve 4-speed)
0370  U7E Newport 70 (73cc reed valve 3-sp auto-clutch)
0080  G7S Scrambler 80 (73cc rotary valve 4-speed)
0100  LS2 Twin Street 100 (97cc piston-port twin 5-sp)
0100  LT2/LT2M Enduro (97cc reed valve 5-speed)
0125  AT2 Enduro 125 (123cc reed valve 5-speed)
0175  CT2 Enduro 175 (171cc reed valve 5-speed)
0250  DT2 Enduro 250 (246cc piston-port 5-speed)
0250  DS7 (street twin) (246cc piston-port twin 5-sp)
0250  TD3 (Road Racer)
0350  TR3 (Road Racer)
0350  R5C Sport 350 (347cc piston-port  twin 5-sp)
0360  RT2/RT2MX Enduro (351cc reed valve 5-sp)
0650  XS2 (4 stroke twin) (653cc SOHC 5-speed)

It’s reed valves for everyone! Small or big, single or twin, come and get your free 20% more torque! Soon reed valves were on all two-stroke Yamahas. Their side badges proudly said “Torque Induction”. In the following few years Suzuki, Kawasaki and most other two-stroke motorcycles switched to reed valve induction.

In 1973 the G7S, DT2, DS7, R5C were replaced by GT1, DT3, RD250, RD350 with reed valve cylinders and other improvements. 

1973 was the beginning of standardized format model names, where the first two or more digits are letters that mean what model type, followed by two or more digits with numbers that mean what size engine. 

1973 Yamaha RD60 wirh “Torque Induction”

1973 Yamaha
0060  RD60 (Street)    (reed valve 5-speed)
0080  GT1 Enduro 80  (reed valve 5-speed)
0080  GTMX 80 (MX) (reed valve 5-speed)
0100  LT3 Enduro 100 (reed valve 5-speed)
0100  LTMX 100 (MX) (reed valve 5-speed)
0125  AT3 Enduro 125  (reed valve 5-speed)
0175  CT3 Enduro 175  (reed valve 5-speed)
0250  DT3 Enduro 250 (reed valve 5-speed)
0250  RD250 (Street)  (reed valve twin 5-sp)
0250  MX250 (MX)     (reed valve 5-speed)
0250  TZ250 (Road Racer)
0350  RD350 (Street) (reed valve twin 5-sp)
0360  MX360 (MX)     (reed valve 5-speed)
0360  RT3 Enduro 360 (reed valve 5-speed)
0500  SC500 YZ (MX)  (reed valve 5-speed)
0500  TX500 (Street) (SOHC twin 5-speed)
0650  TX650 (Street) (SOHC twin 5-speed)
0750  TX750 (Street) (SOHC twin 5-speed)

1974 was the “end of confusion” when all models names were standardized. RD means Street, GT means Enduro, DT means Dual Purpose, TY means Trials, IT means Off Road, MX means Motocross, YZ means Motocross Racer, TZ means Road Racer, TX or XS means Street 4-stroke. The last 1 or 2 digits are the year and version. For the year, 1974 is A, 75 is B, 76 is C, and so on. Letters that might be confusing are skipped. For 49-state and 50-state models, the version digit is blank. For California models it is C.

In this manner, the bike type, size and year are easy to see from the model name. 

1974 Yamaha RD60

1974 Yamaha (suffix A)
0060  RD60A (2-stroke Street)
0080  GT80A  (Enduro)
0080  GTMXA  (Motocross)
0080  TY80A   (Trials)
0080  YZ80A   (MX Racer)
0100  MX100A (Motocross)
0125  MX125A (Motocross)
0125  YZ125A (MX Racer)
0175  MX175A (Motocross)
0200  RD200A (2-stroke Street)
0250  RD250A (2-stroke Street)
0250  TY250A (Trials)
0250  MX250A (Motocross)
0250  YZ250A (MX Racer)

1975 Yamaha GT80

0350  RD350A (2-stroke Street)
0350  TZ350A (Road Racer)
0360  MX360A (Motocross)
0360  YZ360A (MX Racer)
0500  SC500A (Motocross)
0500  TX500A (Street)
0650  TX650A (Street)
0750  TX750A (Street)
0750  TZ750A (Road Racer)

1975 Yamaha (suffix B)
0060  RD60B (2-stroke Street)
0080  GT80C  (Enduro)
0080  GTMXB  (Motocross)
0080  TY80B   (Trials)
0080  YZ80B   (MX Racer)
0100  DT100B (Dual Purpose)
0100  MX100B (Motocross)
0125  DT125B (Trail)

Yamaha Chappy ad

0125  TA125  (Road Racer)
0125  RD125B (2-stroke Street)
0125  MX125B (Motocross)
0125  YZ125B (MX Racer)
0175  DT175B (Trail)
0175  MX175B (Motocross)
0200  RD200B (2-stroke Street)
0250  RD250B (2-stroke Street)
0175  TY175B (Trials)
0250  MX250B (Motocross)
0250  YZ250B (MX Racer)
0350  RD350B (2-stroke Street)
0400  MX400B (Motocross)
0360  YZ360B (MX Racer)
0500  XS500B (Street)
0650  XS650B (Street)

01976 Yamaha (suffix C)
0080  GT80C (Dual Purpose)
0080  GTMXC (Motocross)
0080  YZ80C  (MX Racer)
0080  LB80-2AC Chappy

0080  LB80-2HC Chappy
0100  DT100C (Dual Purpose)
0100  YZ100C (MX Racer)
0100  RS100C (2-stroke Street)

1976 Yamaha LB80-2 Chappy

0125  DT125C (Dual Purpose)
0125  RD125C (2-stroke Street)
0125  MX125C (Motocross)
0125  YZ125C (MX Racer)
0175  DT175C (Dual Purpose)
0175  TY175C (Trials)
0200  RD200C (2-stroke Street)
0250  DT250C (Dual Purpose)
0250  TY250C (Trials)
0250  TZ250C (Road Racer)
0350  TZ350C (Road Racer)

0360  XS360C (Street)
0400  RD400C (2-stroke Street)
0400  DT400C (Dual Purpose)
0400  IT400C (Off Road)
0400  YZ400C (MX Racer)
0500  XT500C (Street)
0500  XS500C (Street)
0650  XS650C (Street)

1977 Yamaha LB80-3 Champ

1977 Yamaha (suffix D)
0080  GTMXD (Motocross)
0080  YZ80D  (MX Racer)
0080  LB80-2AD Chappy

0080  LB80-3D Champ
0100  DT100D (Dual Purpose)
0100  YZ100D (MX Racer)
0125  YZ125D (MX Racer)
0175  IT175D (Off Road)
0250  DT250D (Dual Purpose)
0250  TY250D (Trials)
0250  TZ250D (Road Racer)
0350  TZ350D (Road Racer)

0360  XS360D (Street)
0400
  XS400D (Street)
0400  RD400D (2-stroke Street)
0400  DT400D (Dual Purpose)
0400  YZ400D (MX Racer)
0500  XT500D (Street)
0500  XS500D (Street)
0650  XS650D (Street)
0750
  XS750D (Street)
0750  TZ750D (Road Racer)

1978 Yamaha LB50-P Chappy

1978 Yamaha (suffix E)
0050  LB50-PE Chappy (2-stroke Street)

0080  GT80E (Dual Purpose)
0080  GTMXE (Motocross)
0080  YZ80E  (MX Racer)
0080  LB80-2AE Chappy
0100  DT100E (Dual Purpose)
0100  YZ100E (MX Racer)
0125  YZ125E (MX Racer)
0125
  DT125E (Dual Purpose)
0175  IT175E (Off Road)
0250  DT250E (Dual Purpose)
0250  TZ250E (Road Racer)
0350  TZ350E (Road Racer)

0400  RD400E (Street)
0400  DT400E (Dual Purpose)

1979 Yamaha QT50 Yamahopper

0400  YZ400E (MX Racer)
0400  XS400E, XS400-2E
0500  XT500E (Dual Purpose)

0500  SR500E (Street)
0500  XS500E (Street)
0650  XS650E, XS650SE
0750
  XS750E, XS750SE
1100  XS1100E (Street)

 

In 1979 the Yamahopper QT50 was introduced. Here is a excellent article about the cutie on mopedarmy.comHere is the QT50 Service Manual at QT50.net. That is where “all” QT50 info, love and links are kept.

The Yamaha QT50 is the same design as Honda NC50 and Suzuki FA50. All three ultralights are similar, zippy, well made, and easy to ride.

1979 Yamaha QT50 Yamahopper

1979 Yamaha (suffix F)
0050  QT50F Yamahopper (2-stroke Street)

0050  LB50-PF Chappy (2-stroke Street)

0080  GT80F (Dual Purpose)
0080  GTMXF (Motocross)
0080  YZ80F  (MX Racer)
0100 DT100F (Dual Purpose)
0100  YZ100F (MX Racer)
0100
  MX100F (Motocross)
0125  YZ125F (MX Racer)
0125
  DT125F (Dual Purpose)
0175  IT175F(Off Road)
0175  MX175F (Motocross)

0250 DT250F (Dual Purpose)
0250 YZ250F (MX Racer)
0250  IT250F (Off Road)
0250  TZ250F (Road Racer)

0400
  XS400F , XS400-2F
0400  RD400F (Street)

1980 Yamaha LC50 Champ

0400  IT400F (Off Road)
0
400  YZ400F (MX Racer)
0500  TT500F (Off Road)

0500  SR500F (Street)
0650  XS650F, XS650SF, XS650-2F
0750
  XS750F, XS750SF
1100  XS1100F (Street)

In 1980 only, Yamaha sold the LC50 Champ. It was like a QT50 with fat tires. Here is more about the Yamaha LC50

1980 Yamaha (suffix G)
0050
  QT50G Yamahopper (2-stroke Street)
0050
  QT50-2G Yamahopper (2-stroke Street)
0050
  LB50-PG Chappy (2-stroke Street)
0050
  LC50G  Champ (2-stroke Street)
0
080  GT80G (Dual Purpose)
0080  YZ80G  (MX Racer)
0080  MX80G (Motocross)

1980 Yamaha QT50 Yamahopper

0100  DT100G (Dual Purpose)
0
100
  YZ100G (MX Racer)
0100  MX100G (Motocross)
0125
  IT125G (Off Road)
0125  YZ125G (MX Racer)
0125
  DT125G (Dual Purpose)
0125  TZ125G (Road Racer)

0175  IT175G (Off Road)
0175  MX175G (Motocross)

0175  DT175G (Dual Purpose)
0250  YZ250G (MX Racer)
0250
  IT250G (Off Road)
0250  SR250G (Street)
0250  TT250G (Off Road)
0250
  XT250G (Dual Purpose)
0250  TZ250G (Road Racer)

0400
  XS400G, XS400SG
0425
  IT425G (Off Road)
0400  YZ465G (MX Racer)
0500  TT500G (Off Road)

1981 Yamaha PW50 Y-Zinger

0500  XT500G (Dual Purpose)
0500  SR500G (Street)
0650  XJ650G Maxim (Street)
0650  XS650G, XS650SG
0850
  XS850G, XS850SG
1100  XS1100G, XS1100SG, XS1100LG

 

New for 1981 is the little kids Yamaha. The PW50 Y-Zinger has the same engine and shaft-drive as QT50. That’s right, shaft drive! These are the only (common) 50cc motorcycles with shaft drive. 

1981 Yamaha (suffix H)
0050
  QT50H Yamahopper (2-stroke Street)
0050
  LB50PH Chappy (2-stroke Street)

0050
  PW50H Y-Zinger
0
060  YZ60H (MX Racer)
0080  YZ80H  (MX Racer)

1981 Yamaha QT50 Yamahopper

0080  MX80H (Motocross)
0180  DT80H (Dual Purpose)
0100  DT100H (Dual Purpose)
0
100
  YZ100H (MX Racer)
0100  MX100H (Motocross)
0125
  IT125H (Off Road)
0125  YZ125H (MX Racer)
0125
  DT125H (Dual Purpose)
0175  IT175H (Off Road)
0175  MX175H (Motocross)

0175  DT175H (Dual Purpose)
0185  SR185H (Street)
0250  YZ250H (MX Racer)
0250
  IT250H (Off Road)
0250  SR250H (Street)
0250  TT250H (Off Road)
0250
  XT250H (Dual Purpose)
0400
  XS400H, XS400SH
0465
  IT465H (Off Road)
0400  YZ465H (MX Racer)
0500  TT500H (Off Road)
0
500  XT500H (Dual Purpose)
0500  SR500H (Street)
0550  XJ550H (Street)
0650  XS650H, XS650SH

0650  XJ650H Maxim (Street)
0750  XJ750H Maxim (Street)
0750  XV750H Virago (Cruiser)

0850
  XS850H, XS850SH
0920  XV920H Virago (Cruiser)

1982 Yamaha MJ50 Towny

1982 Yamaha (suffix J)
0050
  QT50J Yamahopper (2-stroke Street)
0050
  LB50PJ Chappy (2-stroke Street)
0050
  MJ50J Towny (2-stroke Street)

0050
  PW50J Y-Zinger
005
0  MX50J (Off Road)
0
060  YZ60J (MX Racer)
0080  YZ80J Motocross (MX Racer)
0
080  MX80J (Off Road)
0180  DT80J (Dual Purpose)
0100  DT100J (Dual Purpose)
0
100
  YZ100J Motocross (MX Racer)
0125
  XT125J (Dual Purpose)
0125  YZ125J (MX Racer)
0175  IT175J (Off Road)

0185
  SR185J (Street)
0200  XT200J (Dual Purpose)
0250  YZ250J Motocross (MX Racer)
0250  IT250J (Off Road)

1982 Yamaha LB50P Chappy

0250  TZ250J (Road Racer)
0250
  SR250J (Street)
0250
  TT250J (Off Road)
0250
  XT250J (Dual Purpose)
0400
  XS400J, XS400RJ (Street)
0465
  IT465J (Off Road)
0490  YZ490J Motocross (MX Racer)

0550  XT550J (Dual Purpose)
0550  XZ550RJ Vision (Street)
0550
  XJ550J Maxim (Street)
0550
  XJ550RJ Seca (Street)
0650 
 XS650SJ Special (Street)
0650  XJ650J Maxim (Street)
0650  XJ650RJ Seca (Street)
0750  XJ750J Maxim (Street)
0750  XJ750RJ Seca (Street)

0750  XV750J Virago (Cruiser)
0920
  XV920J Virago (Cruiser)
0920  XV920RJ (Street)

1983 Yamaha QT50 Yamahopper

1983 Yamaha (suffix K, California version KC)
0050
  QT50K Yamahopper (2-stroke Street)

0050
  PW50K Y-Zinger (Off Road)
0050
  RX50K Special (2-stroke Street)
0050  CA50K Riva 50 (Scooter)

0
060  YZ60K Motocross (MX Racer)
0080  PW80K Y-Zinger (Off Road)
0080  CV80K Riva 80 (Scooter)

0080  YZ80K Motocross (MX Racer)

0100  DT100K (Dual Purpose)
0
100
  YZ100K Motocross (MX Racer)
0125
  XT125K, XT125KC (Dual Purpose)
0125  YZ125K
Motocross (MX Racer)
0175  IT175K (Off Road)
0180  XC180K,   XC180KC   Riva 180 (Scooter)
0180  XC180ZK, XC180ZKC Riva 180 (Scooter)

0200  XT200K, XT200KC (Dual Purpose)
0250
  YZ250K Motocross (MX Racer)
0250
  IT250K (Off Road)
0250
  XT250K, XT250KC (Dual Purpose)
0400
  XS400K, XS400RK (Street)
0490
  IT490K (Off Road)
0490  YZ490K Motocross (MX Racer)

0500  XV500K Virago (Cruiser)
0550  XT550K (Dual Purpose)
0550  XZ550RK Vision (Street)
0550
  XJ550RK Seca (Street)
0600  TT600K (Off Road)
0650 
 XS650K Special (Street)
0650  XJ650K Maxim (Street)
0650  XJ650RK Seca (Street)
0750  XJ750K Maxim (Street)
0750  XJ750RK Seca (Street)

0750  XJ750MK Midnight Maxim (Street)
0750  XV750MK Midnight Virago (Cruiser)
0900  XJ900RK Seca (Street)

0920  XV920K Virago (Cruiser)
0920  XV920MK Midnight Virago (Cruiser)
1200  XVZ12TK Venture (Touring)
1200  XVZ12TDK Venture Royale (Touring)

1984 Yamaha RX50 Special

1984 Yamaha (suffix L, California version LC)
0050
  QT50L Yamahopper (2-stroke Street)

0050
  RX50L Special (2-stroke Street)
0050  CA50L Riva 50 (Scooter)
0080  CV80L Riva 80 (Scooter)

0080  YZ80L Motocross (MX Racer)

0125  YZ125L Motocross (MX Racer)
0180  XC180L, XC180LC Riva 180 (Scooter)
0180  XC180ZL, XC180ZLC Riva 180 (Scooter)

0200  IT200L (Off Road)

0250
  YZ250L Motocross (MX Racer)
0250
  XT250L, XT250LC (Dual Purpose)
0350  RZ350L (2-stroke Street)

0490
  IT490L (Off Road)
0490  YZ490L Motocross (MX Racer)

0600  XT600L, XT600LC (Dual Purpose)
0600  FJ600L, FJ600LC (Sport Street)

0600  TT600L (Off Road)

0700  XV700L, XV700LC Virago (Cruiser)

1000  XV1000L, XV1000LC Virago (Cruiser)
1100  FJ1100L, FJ1100LC (Sport Street)

1200  XVZ12L, XVZ12LC Venture (Touring)
1200  XVZ12DL, XVZ12DLC Venture Royale (Touring)

1985 Yamaha CA50 Riva

1985 Yamaha (suffix N, California version NC)
0050
  QT50N Yamahopper (2-stroke Street)
0050  PW50N Y-Zinger (Off Road)
0050  CA50N Riva 50 (Scooter)
0080  CV80N Riva 80 (Scooter)
0080  PW80N Y-Zinger (Off Road)

0080
  YZ80N Motocross (MX Racer)
0125  YZ125N Motocross (MX Racer)
0125  XC125N,   XC125NC   Riva 125 (Scooter)
0180  XC180N,   XC180NC   Riva 180 (Scooter)
0180  XC180ZN, XC180ZNC Riva 180 Midnight
0180  XC180DN, XC180DNC Riva 180 Deluxe 

0200  IT200N (Off Road)
0200  BW200N Big Wheel (Off Road)

0250
  YZ250N Motocross (MX Racer)
0350
  XT350N, XT350NC (Dual Purpose)
0350  RZ350N (2-stroke Street)
0350  TY350N Trials (Trials)

0350  RZ350NC, RZ350NCII (2-stroke Street)

0490  YZ490N Motocross (MX Racer)

0600 
XT600N, XT600NC (Dual Purpose)
0600 
FJ600N, FJ600NC (Sport Street)
0600 
TT600N (Off Road)
0700 
XV700N, XV700NC Virago (Cruiser)
0700
  XJ700N, XJ700NC Maxim (Street)
0700
  XJ700XN, XJ700XNC Maxim X (Street)
0750  
FZ750N (Sport Street)
1000 
XV1000N, XV1000NC Virago (Cruiser)
1100 
FJ1100N, FJ1100NC (Sport Street)
1200  VMX12N, VMX12NC V-Max (Street)
1200  XVZ12DN, XVZ12DNC Venture Royale (Touring)

1986 Yamaha BW80

1986 Yamaha (suffix S, California version SC)
0050
  QT50S Yamahopper (2-stroke Street)
0050 
PW50S Y-Zinger (Off Road)
0050  CA50S Riva 50 (Scooter)
0050  CE50ES Jog (Scooter)
0080  CV80S Riva 80 (Scooter)

0080
  YZ80S Motocross (MX Racer)
0080
  BW80S Big Wheel (Off Road)
0125  YZ125S Motocross (MX Racer)
0125  XC125S,   XC125SC   Riva 125 (Scooter)
0125  XC125ZS, XC125ZSC Riva 125 Midnight

0200  IT200S (Off Road)
0200 
BW200S, BW200ES Big Wheel (Off Road)
0225  TT225S (Off Road)

0250
  YZ250S Motocross (MX Racer)
0350
  XT350S, XT350SC (Dual Purpose)
0350  TT350S (Off Road)
0350  TY350S Trials (Trials)

0490  YZ490S Motocross (MX Racer)

0600 
XT600S, XT600SC (Dual Purpose)
0600 
FZ600S, FZ600SC (Sport Street)
0600  YX600S, YX600SC Radian (Street)
0600  SRX600S, SRX600SC (Street)

0600 
TT600S (Off Road)
0700 
XV700CS, XV700CSC Virago (Cruiser)
0700  XV700SS, XV700SSC Virago (Cruiser)
0700
  XJ700S, XJ700SC Maxim (Street)
0700
  XJ700XS, XJ700XSC Maxim X (Street)
0700  FZX700S, FZX700SC Fazer (Sport Street)
0750  
FZ750S, FZ750SC (Sport Street)
1100 
XV1100S, XV1100SC Virago (Cruiser)
1200 
FJ1200S, FJ1200SC (Sport Street)
1200  VMX12S, VMX12SC V-Max (Street)
1300  XVZ13DS, XVZ13DSC Venture Royale (Touring)

1987 Yamaha YSR50

1987 Yamaha (suffix T, California version TC)
0050
  QT50T Yamahopper (2-stroke Street)
0050 
PW50T Y-Zinger (Off Road)
0050 
YSR50T (2-stroke Street)
0050  SH50T, SH50ET Razz (Scooter)
0050  SH50EMT Razz Midnight (Scooter)
0050  CE50ET Jog (Scooter)
0080  CV80T Riva 80 (Scooter)

0080
  YZ80T Motocross (MX Racer)
0080
  BW80T Big Wheel (Off Road)
0125  YZ125T Motocross (MX Racer)
0125  XC125T,   XC125TC   Riva 125 (Scooter)
0125  XC125ZT, XC125ZTC Riva 125 Midnight
0200  XC200T,   XC200TC   Riva 200 (Scooter)
0200  XC200ZT, XC200ZTC Riva 200 Midnight

0200 
 BW200ET Big Wheel (Off Road)

1987 Yamaha CE50 Jog

0200  TW200T, TW200TC Trailway (Dual Purpose)
0225  TT225T (Off Road)

0250
  YZ250T Motocross (MX Racer)
0350
  XT350T, XT350TC (Dual Purpose)
0350  SRX350T, SRX350TC (Street)

0350  BW350T Big Wheel (Off Road)
0350  TT350T (Off Road)

0490  YZ490T Motocross (MX Racer)
0535  XV535T, XV535TC Virago (Cruiser)

0600 
XT600T, XT600TC (Dual Purpose)
0600 
FZ600T, FZ600TC (Sport Street)
0600  YX600T, YX600TC Radian (Street)

0700 
XV700CT, XV700CTC Virago (Cruiser)
0700  FZX700T, FZX700TC Fazer (Sport Street)
0700  FZ700T, FZ700TC (Sport Street)
0750  
FZR750RT (Sport Street)
1000  FZR1000T, FZR1000TC (Sport Street)

1200 
FJ1200T, FJ1200TC (Sport Street)
1300  XVZ13T, XVZ13TC Venture (Touring)
1300  XVZ13DT, XVZ13DTC Venture Royale (Touring)

1988 Yamaha DT50

1988 Yamaha (suffix U, California version UC)
0050
  DT50U (2-stroke Street)

0050 
YSR50U (2-stroke Street)
0050  SH50U Razz (Scooter)
0050  SH50MU Razz Midnight (Scooter)
0050  CG50EU Jog (Scooter)
0080  CV80U Riva 80 (Scooter)

0080
  YZ80U Motocross (MX Racer)
0080
  BW80U Big Wheel (Off Road)
0125  YZ125U Motocross (MX Racer)
0125  XC125U Riva 125 (Scooter)
0125  XC125ZU Riva 125 Midnight
0200  XC200U  Riva 200 (Scooter)
0200  XC200ZU Riva 200 Midnight

0200 
 BW200EU Big Wheel (Off Road)
0250
  YZ250U Motocross (MX Racer)
0350  XT350U, XT350UC (Dual Purpose)
0350  BW350U Big Wheel (Off Road)
0400  FZR400U, FZR400UC (Sport Street)

1988 Yamaha CG50 Jog

0490  YZ490U Motocross (MX Racer)
0535  XV535U XV535UC Virago (Cruiser)

0600 
XT600U, XT600UC (Dual Purpose)
0600 
FZ600U, FZ600UC (Sport Street)
0600  YX600U, YX600UC Radian (Street)

0700 
XV700U, XV700UC Virago (Cruiser)
0750  FZ750U, FZ750UC (Sport Street)
0750  
FZR750RU (Sport Street)
1000  FZR1000U, FZR1000UC (Sport Street)

1300  XVZ13U, XVZ13UC Venture (Touring)

1989 Yamaha (suffix W, California version WC)
0050
  DT50W (2-stroke Street)

0050 
YSR50W (2-stroke Street)
0050  SH50W Razz (Scooter)
0050  SH50MW Razz Midnight (Scooter)
0050  CG50W Jog (Scooter)
0050  CW50W Zuma (Scooter)

0080
  YZ80W Motocross (MX Racer)
0125  YZ125W Motocross (MX Racer)
0125  XC125W Riva 125 (Scooter)
0125  XC125ZW Riva 125 Midnight
0200  XC200W  Riva 200 (Scooter)
0200  XC200ZW Riva 200 Midnight

0250
  YZ250W, YZ250WRW (MX Racer)
0250  XV250W, XV250WC Route 66 (Cruiser)

0350  
XT350W, XT350WC (Dual Purpose)
0400  
FZR400W, FZR400WC (Sport Street)
0490  YZ490W Motocross (MX Racer)

0600 
XT600W, XT600WC (Dual Purpose)
0600 
FZR600W, FZR600WC (Sport Street)
0600 
YX600W, YX600WC Radian (Street)
0750 
XV750W, XV750WC Virago (Cruiser)
1000  
FZR1000W, FZR1000WC (Sport Street)
1000  XV1100W, XV1100WC Virago (Cruiser)
1200
  FJ1200W, FJ1200WC (Sport Street)
1200  VMX1200W, VMX1200WC V-Max (Street)

1300 
XVZ13DW, XVZ13DWC Venture Royale (Touring)

1990 Yamaha (suffix A, California version AC)
0050
  DT50A (2-stroke Street)

0050 
YSR50A (2-stroke Street)
0050  PW50A Y-Zinger (Off Road)
0050  SH50A Razz (Scooter)
0050  SH50MA Razz Midnight (Scooter)
0050  CG50A Jog (Scooter)
0050  CW50TA Zuma (Scooter)

0080
  YZ80A Motocross (MX Racer)
0080 
BW80A Big Wheel (Off Road)
0100  RT100A Off Road (Off Road)

0125  YZ125A Motocross (MX Racer)
0125  XC125ZA Riva 125 Midnight
0180  RT180A Off Road (Off Road)
0200  XC200ZA Riva 200 Midnight
0200  TW200A, TW200AC Trailway (Dual Purpose)

0250
  YZ250A, YZ250WRW (MX Racer)
0250  XV250A, XV250AC Route 66 (Cruiser)

0350  
XT350A, XT350AC (Dual Purpose)
0400  
FZR400A, FZR400AC (Sport Street)
0490  YZ490A Motocross (MX Racer)
0535  XV535A, XV535AC Virago (Cruiser)

0600 
XT600A, XT600AC (Dual Purpose)
0600 
FZR600RA, FZR600AC (Sport Street)
0600 
YX600A, YX600AC Radian (Street)
0750 
XV750A, XV750AC Virago (Cruiser)
1000  
FZR1000A, FZR1000AC (Sport Street)
1000  XV1100A, XV1100AC Virago (Cruiser)
1200
  FJ1200A, FJ1200AC (Sport Street)
1200  VMX1200A, VMX1200AC V-Max (Street)

1300 
XVZ13DA, XVZ13DAC Venture Royale (Touring)

1991 Yamaha YSR50

1991 Yamaha (suffix B, California version BC)
0050 
YSR50B (2-stroke Street)
0050  PW50B Y-Zinger (Off Road)
0050  SH50B Razz (Scooter)
0050  CG50B Jog (Scooter)
0080  PW80B Y-Zinger (Off Road)

0080
  YZ80B Motocross (MX Racer)
0125  YZ125B Motocross (MX Racer)
0125  XC125B Riva 125 (Scooter)
0180  RT180B Off Road (Off Road)
0200  XC200B Riva 200 (Scooter)
0200  TW200B, TW200BC Trailway (Dual Purpose)

0250
  YZ250B Motocross (MX Racer)
0250  WR250ZB (Dual Purpose)

0350  
XT350B, XT350BC (Dual Purpose)
0600 
XT600EB, XT600EBC (Dual Purpose)
0600 
FZR600RB, FZR600RBC (Sport Street)
0750 
XV750B, XV750BC Virago (Cruiser)
1000  
FZR1000B, FZR1000BC (Sport Street)
1000  XV1100B, XV1100BC Virago (Cruiser)
1200
  FJ1200B, FJ1200BC (Sport Street)
1200  VMX1200B, VMX1200BC V-Max (Street)

1300 
XVZ13DB, XVZ13DBC Venture Royale (Touring)

1992 Yamaha CY50 Jog

1992 Yamaha (suffix D, California version DC)
0050 
YSR50D (2-stroke Street)
0050  PW50D Y-Zinger (Off Road)
0050  SH50D Razz (Scooter)
0050  SH50MD Razz Midnight (Scooter)
0050  CY50D Jog (Scooter)
0080  PW80D Y-Zinger (Off Road)

0080
  YZ80D Motocross (MX Racer)
0100  RT100D Off Road (Off Road)

0125  YZ125D1 Motocross (MX Racer)
0125  XC125D Riva 125 (Scooter)
0180  RT180D Off Road (Off Road)
0200  
TW200D, TW200DC Trailway (Dual Purpose)
0225  XT225D, XT225DC Serow (Dual Purpose)

0250
  YZ250D1 Motocross (MX Racer)
0250  WR200RD (Dual Purpose)
0250  WR250ZD (Dual Purpose)

0350  
XT350D, XT350DC (Dual Purpose)
0500  WR500ZD (Dual Purpose)

0600 
XT600ED, XT600EDC (Dual Purpose)
0600  XJ600SD, XJ600SDC Seca II (Street)
0600 
FZR600RD, FZR600RDC (Sport Street)
0750 
XV750D, XV750DC Virago (Cruiser)
0850  TDM850D, TDM850DC (Street)

1000  
FZR1000D, FZR1000DC (Sport Street)
1000  XV1100D, XV1100DC Virago (Cruiser)
1200
  FJ1200D, FJ1200DC (Sport Street)
1200  FJ1200AD, FJ1200ADC (Sport Street)
1200  VMX1200D, VMX1200DC V-Max (Street)

1300 
XVZ13DD, XVZ13DDC Venture Royale (Touring)

1993 Yamaha (suffix E, California version EC)
0050  
PW50E Y-Zinger (Off Road)
0050  SH50E Razz (Scooter)
0050  CY50E Jog (Scooter)
0080  
PW80E Y-Zinger (Off Road)
0080
  YZ80E1 Motocross (MX Racer)
0100  RT100E Off Road (Off Road)

0125  YZ125E1 Motocross (MX Racer)
0125  XC125E Riva 125 (Scooter)
0180  RT180E Off Road (Off Road)
0200  
TW200E, TW200EC Trailway (Dual Purpose)
0225  XT225E, XT225EC Serow (Dual Purpose)

0250
  YZ250E, YZ250E1 Motocross (MX Racer)
0250  WR250ZE (Dual Purpose)

0350  
XT350E, XT350EC (Dual Purpose)
0500  WR500ZE (Dual Purpose)
0535  XV535E, XV535EC Virago (Cruiser)

0600 
XT600EE, XT600EEC (Dual Purpose)
0600  XJ600SE, XJ600SEC Seca II (Street)
0600 
FZR600RE, FZR600REC (Sport Street)
0750 
XV750E, XV750EC Virago (Cruiser)
0850  TDM850E, TDM850EC (Street)

1000  
FZR1000E, FZR1000EC (Sport Street)
1000  XV1100E, XV1100EC Virago (Cruiser)

1200  FJ1200AE, FJ1200AEC (Sport Street)
1200  VMX1200E, VMX1200EC V-Max (Street)

1300 
XVZ13DE, XVZ13DEC Venture Royale (Touring)

Sources:

1. Partzilla (Albany GA or Reno NV USA) https://www.partzilla.com/catalog/yamaha/motorcycle
They show and list every part for every US model Yamaha. 

2. Consolidated Motor Spares (Netherlands) https://www.cmsnl.com/yamaha-motorcycle_model16707/ 
They show and list every part for every Yamaha world wide.

3. Jacks Scooter Shop http://www.jacksscootershop.com/scooter_models.html
They list US model Yamaha scooters. Provided some scooter model name corrections to Partzilla.

4. Google Images
Some images can contain original bikes with correct make model and year in the title. Provided visual verification and some nick names. 

5. Intertec’s Vintage Collection Series (Two Stroke Motorcycles) 1990 ISBN 0-87288-386-8
Service manual for 23 brands of vintage two stroke. Provided specifications, model names, porting, tuning. 

All of these sources were used to cross-check each model and year, and occasionally to make corrections. When one source disagreed with all of the others, it was was assumed to be wrong. So the info above is as correct as possible, but there still could be some errors or omissions.