Speedometers

September 10, 2012

Welcome to Speedometers and speedo parts.

Speedo Basics:  Speedometers on mopeds are all mechanical type, not electronic. A “driver” or “sender” on the front wheel rotates the cable. The cable, with a spinning wire inside, goes up to the speedometer “gauge” or “head”. Inside the head a spinning magnet moves the needle. An “odometer” or mileage meter is also driven by the cable, with gears.  Either the speedometer or odometer can work without the other, but the both need the cable and driver to be working. So when both speed and miles don’t work, it’s usually caused by a broken cable, and sometimes the driver. If either the speedo or odo works, then the cable and driver must be good.

Speedo Families: There are several brands of moped speedometers: CEV (Italian), VDO (German), Huret (French), Veglia (Italian), plus other minor ones, Stewart Warner (USA), Tatung (Taiwan), Walker licensed by VDO (Spain), and maybe more. Each family has it’s own style of cable wire and cable end piece threads. So a CEV speedo requires a CEV speeedo cable, and a VDO speedo requires a VDO cable, pretty much. In the table below, all of the speedometer specifications and applications are listed. It is under construction…  

 

CEV Speedometers

CEV

CEV Speedometers

Italy Flag

 

 

 

 

 

These are the vintage CEV speedometers for sale. They have all been cleaned, checked, and lubed. 15 out of 17 were originally frozen from “the old grease turning into glue”. It takes days or weeks and dozens of repeated applications of penetrating oil and rotation on a drill, before all of the stickiness is gone. If any stickiness is left behind, it can re-freeze a year later. A frozen speedo will cause the speedo cable to break right away. That is the main reason why 35 year old mopeds often have broken speedo cables. The other reason is the cable gets kinked or tangled.

                   diam      color         max    tested   dev from      odometer            glass/face
  #  mileage  mm  back/text     speed    speed   23.8 avg      condition              condition                  price
==========================================================================
  1   03297   60  dk blue/wht  40mph   24.0      +0.2    works: now 03298    used, cracked             N/A
  2   00002   60  dk blue/wht  40mph   10.0     -13.8    works: now 00003    reads very low            $30
  3   00001   60  dk blue/wht  40mph   22.5       -1.3    works: now 00002    new, perfect glass     $80
  4   00009   60  dk blue/wht  40mph   21.0       -2.8    frozen                       only speedo works       $30
  5   01062   60  dk blue/wht  40mph   25.0      +1.2    works: now 01063    used, good “glass”     $80
  6   00001   60  dk blue/wht  40mph   25.0      +1.2    works: now 00002    new, tiny scratches     $70
  7   00847   60  dk blue/wht  40mph   24.0       -0.8    works: now 00848    used, scratched bad    N/A
    00001   60  dk blue/wht  40mph   23.0       -1.8    works: now 00002    new, tiny scratches     N/A
  9   03751   60  dk blue/wht  60mph   25.0      +1.2    works: now 03752    used, good glass        $100
10   00000   48  white/black   40mph   26.0      +2.2   works: now 00001    new, smaller size        N/A               
11   00000   60  dk blue/wht  40mph   24.0       -0.8    works: now 00001   new in original box      $80
12   00001   60  dk blue/wht  40mph   23.5       -0.3   works: now 00002    new in original box      $80
13   00001   60  dk blue/wht  40mph   24.0      +0.2   works: now 00002    new in original box      $80
14   00000   60  dk blue/wht  40mph   20.5       -3.3   works: now 00001    new in original box       $60
15   05182   60  black/white   40mph   25.0      +1.2   works: now 05183    has a small smudge     $70
16   00995   60  black/white   40mph   25.0      +1.2   works: now 00996    slightly cloudy              $70
17   00084   60  black/white   40mph   27.0      +3.2   works: now 00085    very good “glass”       $90
xx   00367   60  dk blue/wht  40mph    froze       —-   unknown                     for parts only              $20
xx   00000   60  dk blue/wht  40mph    froze       —-   unknown                     for parts only              $20

These CEV speedometers are all tested on the same drill, for comparison of speed accuracy. The odometer accuracy never varies – it either works or not. It takes up to 3 minutes at 20mph to click off one mile. Each speedometer is tested for at least 3 minutes, some over 10 minutes all together. Once all of the 17 tested speeds are retested and verified, an average speed can be calculated. First the highest and lowest are ignored. Then the remaining 15 test speeds are added up and the sum is divided by 15 to give 23.8 average. You can see that most of the speedos tested at 23, 24, or 25 mph. The accuracy is an important factor in determining the price. The condition of the glass, face, and needle are also important. 

 

CEV#  axle  ratio  mark   side  style     measured ratio      cable
7121    11   18:10    121
7296    11   17:10    296      left     left   1+8/12 = 1.67 (1.70)  2.0  long finger
7324    11   17:10    324       left    left    1+8/12 = 1.67 (1.70) 2.0  short bent finger
7402    11   13:10    402
7408    11   16:10    408       left    left   1+7/12 = 1.58 (1.60)  1.8
7416    12   16:10    416      right  right  1+7/12 = 1.58 (1.60)  2.0
7422    10   16:10    422
7428    11   17:10    428
7429    12   18:10    429

 

 

 

 

 

 

 

 

 

 

 

 

 

Derbi Speedometers

 

Derbi speedometers are made by Walker, under license by VDO. They are compatible with other VDO speedos on Puch, Sachs, Batavus, Sparta, Kreidler, and others. But they say “Derbi” on the face, so they are here in Derbi, rather than with the other VDO’s in Parts/By Type/Speedometers.

 

Part #  # ←pic#….Description Price      Applications
########### ### ################### #### #########################
all the same! Derbi Speedometers Derbi 1976-1985 all models
000.501.6010 1 10447 miles, new cond $60 test=16.5mph, worked good
        continued … flat rim original on TT
000.501.6010 2 01953 miles, new cond $70 test=16.0mph, worked good
        continued … flat rim original on TT
000.501.6010 3 05565 miles, fair cond $30 test=16.0mph, worked good
000.501.6010 4 03702 miles, fair cond. $30 test=17.0mph, worked good
000.501.6010 5 01944 miles, good cond N/A test=17.0mph, worked good
000.501.6010 6 00038 miles, new cond $80 test=16.5mph, worked good
000.501.6010 7 00001 miles, new cond $90 test=17.0mph, worked good
000.501.6010 8 00124 miles, new cond N/A test=16.5mph, worked good
000.501.6010 9 00933 miles, good cond $55 test=17.5mph, worked good
        continued … shown with rubber visor ring
000.501.6010 10 04376 miles, fair cond. $35 test=16.0mph, worked good
000.501.6010 11 16748 miles, bad needle $15 test=18.0mph, worked good
        continued … shown with rubber visor ring
000.821.6830 rubber visor ring $10 optional

Under construction …

Derbi SL, SLE, TT Speedometer Cables: Many Derbi speedometer cables have a kink below the speedometer that causes the inner wire to break repeatedly. The kink is from the back of the “pancake” headlight pushing the speedo cable back. There is no easy remedy. As with any speedometer cable, any kink or sudden change in direction will eventually cause the inner cable wire to break there, because as it rotates it is being bent back and forth.    

 

 

 

 

Huret Speedometers

These are on Garelli, Motobecane and others. They all freeze up solid from the grease inside turning into sticky tar. 

 

VDO Speedometers

These are all of Myrons VDO speedometer drivers. They are just listed here to help learn what the markings mean.

Style means what side of the bike would make the cable exit below the axle and towards the rear of the bike. This can be told from a distance. Left style looks like a letter “d”. Right style looks like a letter “b”.

Side means what side of the bike would make the cable rotate clockwise, viewed from above. This internal difference is from the direction the helical teeth wind around the worm gear. Other than by markings, this can only be determined by rotating the wheel prongs and observing the cable rotation.

Metal Drivers (made up to 4/1978)
od   xx      00/1   date   make       rim side    style              part number
21 LH        27/1  11/77  Columbia 17″ left    left   open with finger, 1/2″ hole
21 RV        23/1  05/77  Puch xxx 17″ right  left   shielded
21 RV        23/1  10/77  Puch xxx 17″ right  left   shielded
21 RV        23/1  07/77  Puch xxx 17″ right  left   shielded
21 RV        23/1  04/78  Puch xxx 17″ right  left   shielded
21 RV        23/1  12/78  Puch xxx 17″ right  left   shielded
23 LH        23/5  11/74  Sparta     16″ left    left   shielded  #06008
23 LH        23/5  12/76  Sparta     16″ left    left   shielded  #06008
23 LH        23/5  07/77  Sparta     16″ left    left   shielded  #06008
23 LH        23/5  04/78  Sparta     16″ left    left   shielded  #06008
21 LH        6/70  11/76  KTM xxx  17″ left    left   open xxx #1009-050-000
21 LH        6/61  01/77  unknown 17″ left    left   open
21 LH        6/61  02/71  unknown 17″ left    left   open
01 LV        6/63  04/77  unknown 11″ left    right open with finger, 11mm hole
21 LH/RH 17/17  02/77  unknown 17″ both  both
21 LH/RH 17/17  03/78  unknown 17″ both  both

Plastic Drivers (made from 4/1978 on)
01 LV       28/18  11/79  unknown ??” left    right  open with finger, 11mm hole
16 LH       29/26   6/78  unknown 16″ left    left    open with finger, 11mm hole
16 LH       32/1 0  4/78  Batavus   16″ both  both  open  #42.365 (Regency)
17 LH       29/24   4/80  unknown 17″ left    left    open
17 LH       31/17   4/78  unknown 17″ left    left    shielded
17 RV       31/5     7/78  Puch xxx 17″ right  left   shielded
17 RV       31/5     8/78  Puch xxx 17″ right  left   shielded

 

 

Veglia Speedometers

These are on Peugeot, Vespa, and some Italian mopeds. 

 

Tomos Speedometers

Tomos Speedometers on US model mopeds 1976 to 2013

 

  Tomos Speedometers      “Family Reunion Group Photo”      left to right

 Tomos#     Years      Models       Face Colors      Logos/Words     Speed               Bulb type            Cable/thread

1. 213233  1976-79  all models  blue  with white           CEV/MPH       40   9mm bayonet   6V 1.2W    CEV 11×0.75
2. 214838  1980-87  all models  black with white            CEV/MPH      40   5mm wedge     6V 1.2W    CEV 11×0.75
3. 222006  1987-91  all models  black with white     CEV/Tomos solid   40   5mm wedge   12V 1.2W   CEV 11×0.75
4. 227496  1992-02  all models  black w/white Facomsa/Tomos outline 40   5mm wedge   12V 1.2W   CEV 11×0.75
5. 232803  2002-05  all models  white with black     MMB/Tomos solid  40   7mm bayonet 12V 1.2W   VDO 10×1.00
6. 232803  2009-10  Revival      white with black F-logo/Tomos outline 40   5mm wedge   12V 1.2W   VDO 10×1.00
7. 232803  2005-08  all models  white with black          generic          40   7mm bayonet 12V 1.2W   VDO 10×1.00
8. 232803  2008-13  all models  white with black    Alpha/Tomos solid  40   7mm bayonet 12V 1.2W   VDO 10×1.00

These Tomos speedometers all read in mph. The odometers all read in miles, except #6 which reads in kilometers.

 Speedometer Cables

This is all so far. More material will be added later…

Part # # ←picture#………Description Price      Applications
  S P E E D O   C A B L E S
204200 speedo cable VDO Puch Maxi 25.7″ $18 Puch Maxi, Sparta, Batavus, Flandria
oldver speedo cable VDO Puch 29.5″ $20 Puch Maxi Sears FS red not silver
speedo cable VDO Puch 31.5″ $30 Puch Magnum Sears FS silver
217664 speedo cable VDO Tomos 30.7″=780mm $18 Tomos 04-later many others
213729 speedo cable CEV Tomos 29.5=750mm $18 Tomos 75-04 many others
speedo cable Huret Motobecane/Garelli N/A Motobecane and Garelli
speedo cable Veglia Peugeot N/A Peugeot