July 14, 2014

Contents:  1. a. Wedge bulbs (all glass, push on)
Contents:  1. b. Festoon bulbs (glass tube, push on)
Contents:  1. c. Screw base bulbs (screw on)
Contents:  2. Bayonet base bulbs (push and turn)
Contents:  3. Plate base headlight bulbs

Contents:  4. Bulb information



Most moped light bulbs are standard automotive bulbs. Most bulbs are made in 6 volt or 12 volt versions, But finding 6V bulbs is difficult since all cars are 12V since the 1970’s. In all of these magneto/generator powered head lights, a 12 volt bulb will replace a 6 volt one, but won’t be as bright.


wedge bulbs1a. Miniature All-Glass Wedge Bulbs:
044.687   6V 1.2w          5mm wedge Osram  $3.00 
for Tomos speedos (CEV) late 80’s

ELG74     12V 1.2w  74  5mm wedge Flüsser $3.00
for Tomos speedos (CEV black) 1990 to 2002

6V1.7W     6V 1.7w       10mm wedge    N/A

12-1080 12V 3w    194 10mm wedge  $1.00 or $5.00 for 10

1b. Festoon Bulbs – look like glass fuses 
festoon bulb 8 x 28 SV7-8 endsFor hi-beam indicator inside “bullet” headlight: 
20.0908    6V 0.6w 000  6 x 31    SV6 ends     $2.00
10626.5    6V 1.5w CEV  8 x 28    SV7-8 ends   N/A
For some Euro tail lamps:
14210.00   6V  3w  000  8 x 30   SV8.5-8 ends  $2.00

ELB6428  12V 3w  CEV   8 x 28    SV7-8 ends  $2.00
ELB6428  12V 3w  CEV   8 x 31    SV7-8 ends  $2.00
14100.0   12V 5w  000  11 x 39  SV8.5-8 ends $2.00
festoon bulb 11 x 36 #211
00000.00  6V  5w  000  11 x 39  SV8.5-8 ends  none
For some Euro head lamps:
000.000    6V 15w  000  15 x 44  SV8.5-8 ends $3.00
200019   12V 10w  000  11 x 44  SV8.5-8 ends $2.00
12V15W  12V 15w  000  11 x 44  SV8.5-8 ends $2.50


6V 0.6W E10 bulb1c. Bulbs with E10 screw base, single contact
6V0.6W    6V 0.6w            $1.50
for 76-80 Peugeot speedometer
14460      6V  6w  yellow   $2.00  
for early Solex 3800 head light

6V 6W E10 yellow bulb

2. Bayonet Base Bulbs

 These bulbs have little nubs on the base. You push in and rotate clockwise to install.

Bulbs 2aBA7s bulbBulbs with BA7s base, 7mm bayonet single  
10632.1     6V 0.6w  CEV   N/A   use 7V 0.7W
7V0.7W     7V 0.7w           $1.00
6V1.0W     6V 1.0w           $1.50
ELB1262    6V 1.5w           $1.50
ELB3898   12V  2w           $1.50
for 78-80 Motobecane/03-07 Tomos/other VDO

55 BA9s bulbBulbs with BA9s base, 9mm bayonet single
6V0.8W     6V 0.8w   47   $1.50  long glass
200002     6V 1.5w   51   $2.00  small glass
6V2.0W     6V  2w            $1.00  small glass
6V4.0W     6V  4w            $2.50  long glass
200003    12V  2w   53    $1.50  small glass
200004    12V  2w   53    $1.50  long glass
for 1987-on Tomos turn or hi beam indicator
12V3W    12V  3w   57      N/A     large glass
ELB3893 12V 4w Everglo  $2.50  long glass
1423000 12V 4w xxxxxx  $2.00  small glass

63 BA15s bulb

BA15s base, 15mm bayonet single, small glass
ELB5006   6V  5w    63     $2.00
for 77-later Puch, must have this to be bright
6V8W       6V  8w    00     $2.50 for Cateye turn sig.
ELB5001   6V 10w   81     $2.00
ELB57     12V  5w   67     $1.50
SAE97     12V  8w   97     $1.50
ELB89     12V 10w  89     $1.50

BA15s base, 15mm bayonet single, large glass
SAE87      6V 12w      87    N/A
H101C      6V 21w   1129   $2.00
6V24W     6V 24w   1133   $2.00 very large glass
12V12W  12V 12w  1003   $1.50
12V 21w  0000   $1.50
ELB1156  12V 26w  1156   $2.00 
12V32cp 12V 32cp  1073   $1.50  12V 20w approx.


1176 BA15d bulbBA15d base, 15mm bayonet two-contact, equal nubs
2-filament kinds conduct through the shell, like most bulbs.
6V15.15w   6V 15/15w        N/A  2-filaments 2-contacts
12V21.6c  12V 21/6cp 1176   $2 2-filaments 2-contacts
12V17.5w 12V 17/6w  1158   $3 2-filaments 2-contacts
for most 1950’s car’s turn/brake/tail light. Obsolete.
1-filament kinds do not conduct through the metal shell.  
12V4cp     12V 4cp     1178   N/A  1-filament, 2-contacts


BAY 15d base, 15 bayonet 2-contacts, unequal nubs
10630.1    6V 15/3w   CEV   $2.00
10630.3    6V 18/3w   CEV     N/A
for Vespa Ciao tail light
ELB1154   6V 21/5w  1154  $2.00
ELB1157  12V 27/8w 1157  $1.00      box of 10 $6.00
24V216c  24V 21/6cp           $1.50



12V 35-35w BA20d bulbBA20d base, 20 bayonet 2-contacts, unequal nubs
6V25.25   6V 25/25w          $12.00
for Derbi Variant Sport 1986-89
20-0018 12V 35/35w  Narva $5.00
for Tomos Revival/Streetmate
044.701 12V 25/25w           $5.00
for Tomos ’90-on, square HL, ’95-05 Kinetic TFR


 3. Plate Base Headlight Bulbs

These are all for head lights, for higher power and precise focus.

P15d (P15d-1) 15×30 “3-hole plate” double plate bulbs 212V 35-35 P15d bulb
6V25.25    6V 25/25w      P15d base  $12   
500310    12V 35/35w      P15d base  $12
12V5050  12V 50/50w      P15d base  $10



12V 45-45w P15d-3 bulbP15d-3 base, 15×25 “3-tab plate” double
12V35.35  12V 35/35w     P15d-3 base   N/A




12V 15w P26s bulbP26s base, 15×26  “stepped plate” single
C-1432      6V 15w       P26s base      $3.00
for 1984-86 Puch with square Niox headlight
and for many 60’s-70’s non-US-model mopeds
20-0023  12V 15w        P26s base     $8.50
for Tomos Arrow-R and Streetmate-R (dual HL)



PX15d base, 15×24 “plain plate” double
632729   6V 15/15w    PX15d base      N/A
632787  12V 15/15w    PX15d base     $7 
632843  12V 18/18w    PX15d base    N/A
633905  12V 25/25w    PX15d base    N/A





4. Bulb Info

Mopeds frequently burn out bulbs, from both vibration and surges of electricity. Because there’s no battery, the voltage varies a little. At idle the lights are very dim, but at full speed they’re bright. Hopefully they’re not bright white, as that means they might burn out soon. Yellow is good but orange is too dim.

Head light: For some reason, many old 6 volt mopeds need 12 volt bulbs, or else they burn out. Some might even need a 12V AC voltage regulator ($25) added on in addition to 12V bulbs, to help prevent bulb burn out. All 6 volt mopeds can use 12 volt headlight bulbs, but the headlight is dimmer. On most 6 volt mopeds (with head and tail powered by same wire) using 12 volt headlight bulbs, the tail light is brighter. On some 6 volt mopeds using 12 volt headlight bulbs, the tail light is dimmer.

Tail light: European mopeds with 4-coil Bosch 90mm magnetos, like 1977-86 Puch, or 1977-79 Batavus, need a 6V 21W headlight bulb instead of a 12V 26W #1156, in order for the tail lite to be bright.

Brake light: Some bikes have issues where the brake light is needed for the ignition to function. On those with a single 2-filament bulb, they might loose spark when the brakes are applied with a 12 volt #1157 bulb. Then they need a 6 volt #1154 light bulb. On those with two 1-filament bulbs and a secret hidden resistor inside (connected in parallel with the brake light), they normally do not loose spark when the brake light bulb is wrong, burned out, disconnected or missing. See tail lights. 

Battery power: Large motorcycles and cars have headlights powered by battery. With a battery the voltage is steady and limited. Those lights do not burn out often (except maybe from vibration). When several lights are powered by one battery wire, and one of them burns out, the others are normally not affected.

Generator power: Small motorcycles and mopeds have headlights powered by generator. With a generator the voltage rises and falls with engine speed, and can become too high at times. When several lights are powered by one generator wire, and one of them burns out, the others get more voltage and become brighter. Then soon they also burn out from that over-voltage. For example, you are riding along and you speedometer light suddenly gets brighter. That might mean your tail light just burned out, and soon the head and speedometer light will follow.

Watts matching: With generator power and without a solid-state voltage regulator, for each generator output wire, the total watts of all the bulbs powered by that wire must match the rated watts of that generator output. Generators (magnetos) usually have more than one lighting output. For example a 1977 Batavus has a 6-wire Bosch magneto with 3 lighting outputs 6V 5W (for 6V 5W bulb), 6V 10W (for 6V 10W bulb), and 6V 22W (for 6V 21W plus 6V 1.5W bulbs). When the correct bulbs are used, the watts match. Then the lights are not too bright going fast, and not too dim going slow. 

Voltage regulation: Bulb watts matching and multiple lighting outputs became obsolete in the 1980’s with the advent of low-cost efficient and reliable solid-state (electronic) voltage regulation. A regulator makes the generator behave like a battery, with a maximum voltage limit. Some makes had this earlier in the 1970’s, like Motobecane. Under the headlight was a 2 inch box with cooling fins. A thing that looks like a 80’s power transistor is screwed into it. It is actually a dual zener power diode, that regulates in both directions for AC, in this case 6 volt. It limits the voltage to below about 7 VAC. Almost all modern AC voltage regulators are 12 volt, since 6 volt equipment also became obsolete in the 1970’s and 80’s.