Tail Lights

July 14, 2016

Tail lights: 1970’s and 1980’s USA moped models generally have different tail lights than European models. That is because of the 1972 and 1976 US DOT motor vehicle safety requirements for motor-driven cycles and motorized bicycles. The rear light must shine to the rear and the sides, and illuminate the license plate. The rear of the bike must have red side and rear reflectors. Putting the reflectors with the tail light eliminates the need for adding them on elsewhere. Also the bulbs are bigger, 15 not 9mm, because of higher watts required for the running light, 5 watts instead of 3, and for the brake light 10 watts instead of nothing.  

The most troublesome US DOT requirement was that the brake light operation cannot cause the head light to get dimmer. This meant that the brake light had to be powered by a separate source coil in the magneto-generator. There was no solid-state voltage regulation until the mid-1980’s. The AC voltage was crudely regulated by generator magnetism, rather than a external mechanical or electronic device.

Internal ignition ground family: Some US moped versions had an additional source coil to operate the brake light, such as Puch or Batavus (Bosch magnetos). On these the brake light wires never cause the engine to not run. The ignition source coil is grounded internally, inside the generator. So the ignition is never affected by any of the lights.

The brake light only needs to be matched with the generator source coil, usually 6 volt 10 watt. Unlike your house, a higher wattage bulb makes less light. If a 6V 18W bulb is used, it will be dim. If a 6V 5W bulb is used, it will be too bright and burn out.

External ignition ground family: Some US mopeds use the ignition source coil to operate the brake light, such as Garelli or Minarelli with (CEV magnetos). On these the brake light wires can cause the engine to loose spark and not run. If the connecters or wires are corroded or loose, on the brake light wires, the engine will stall when the brakes are applied. If the brake switch wires up at the handlebars are also loose, then the engine will not ever “have spark”. Removing the tail light assembly, or changing it, can cause these bikes to not run.

The brake light needs a 3.2 ohm (10 watt max) resistor in parallel with a 6 volt 10 watt bulb #81, or just a 6 volt 18 watt bulb #1129, or a 6V 21/5W #1154 dual filament bulb.

Modern family: After the 1980’s, thankfully, there were no more mopeds with external ignition grounds. They had internal ignition grounds. So the brake light wires never cause the engine to loose spark. Their solid state AC voltage regulators allowed all the lights to run off of the same generator wire, yet still stay the same brightness as additional lights (brake) were turned off or on. The modern family also uses 12 volt bulbs instead of 6 volt.

The brake light bulb does not need to be any particular wattage. Just like in your house, a higher wattage bulb would produce more light. You want the brake light to be brighter than the tail light, for safety, but it doesn’t need to be.

 

 


CEV Tail Lights

Many or most 1970’s European made mopeds, USA models, use CEV tail lights, made in Italy.

 

CEV 9350 chrome

CEV 9350 black

Peugeot 103 tail light assembly

 

 

 

 

 

 

CEV 9350: Many 1972 -1976 US mopeds had this “oval with flat sides” single bulb lamp. It was exclusively on mopeds with an external ignition ground. If the brake light burned out, the bike would loose spark when the brakes were applied. Internal ignition ground bikes did not use this lamp because it made the brake light too dim (because the 10 watt generator coil did not match the 20 watt bulb filament).

CEV 9400: In 1977 the 9400 “rectangular” series dual-bulb lamps came out, with two different bulb holders and three body styles. They could be for either family, internal or external, because the bulb holder could be either a “large glass” 18 or 21 watt brake light bulb, for external ignition ground types, or a “small glass” 10 watt brake light bulb version, for internal ignition ground types. At first the 9400,9401,9417 and 9400.1,9401.1,9417.1 were the versions. These were perfect for motorcycles with batteries.

To solve the problem of loosing spark if the brake light burned out, CEV made versions special for USA mopeds, with a power resistor hidden inside. If the brake light burned out, the resistor would allow the engine to stay running. The 9400.2, 9401.2 and 9417.2 soon superseded the 9400.1, 9401.1, and 9417.1. So the “1” versions are uncommon in the US, and the “2” versions are uncommon in Europe.

CEV 9400 grey
Piaggio 185026

CEV 9400.2 grey
Piaggio 185028

Peugeot 102 tail light assembly

 

 

 

 

 

 

 

CEV 9400

CEV 9400.1

CEV 9400.2

Of these, the 9400 and 9400.2 are common.

The 9400.2 is on 1978-89 Derbi.

The 9400 is on 1980-83 Piaggio Grande

 

 

 

 

CEV 9401

CEV 9401.1

CEV 9401.2

Of these, only the 9401.2 is common.

It is on 77-78 Garelli and others.

 

 

 

 

 

 

CEV 9417

CEV 9417.1

CEV 9417.2

Of these, 9417 and 9417.2 are common.

 The 9417.2 is on 1977-85 Tomos, and 1979-85 Garelli.

The 9417 is on 1987-2011 Tomos, and 1978-86 Puch. 

 

 

 

 

 

9350 xx N/A tail light oval with flat sides
9350 xx one dual filament bulb

03211 x N/A red lens for 9350

03212 x $40 lamp body chrome

03212.1 $45 lamp body black Peugeot

22253 x 0$1 lens screw M4 x 72 phillips

10630.3 0$2 bulb 6V 18/5W #1154, see bulbs

16590 x $10 mount with license plate bracket

02748 x N/A mount with license plate bracket


9400 xx N/A tail light with mount, two 15mm bulbs
black xxN/A top: 6V 10W, small glass, no resistor
grey xx $60 bottom: 6V 5W small glass

9400.1   N/A tail light with mount, two 15mm bulbs
black xxN/A top: 6V 18W, large glass, no resistor
grey xx $65 bottom: 6V 5W small glass

9400.2   N/A tail light with mount, two 15mm bulbs
black xxN/A top: 6V 10W, small glass, with resistor
grey xx $65 bottom: 6V 5W small glass

9401 xx$75 tail light with mount, two 15mm bulbs
9400 xx top: 6V 10W, small glass, no resistor
9400 xx bottom: 6V 5W small glass

9401.1  $80 tail light with mount, two 15mm bulbs
9400 xx top: 6V 18W, large glass, no resistor
9400 xx bottom: 6V 5W small glass

9401.2  $80 tail light with mount, two 15mm bulbs
9400 xx top: 6V 10W, small glass, with resistor
9400 xx bottom: 6V 5W small glass

9417 xx$65$40 tail light w/mount, 2 15mm bulbs
9400 xx top: 6V 10W, small glass, no resistor
9400 xx bottom: 6V 5W small glass

9417.1  $70$45 tail light w/ mount, 2 15mm bulbs
9400 xx top: 6V 18W, large glass, no resistor
9400 xx bottom: 6V 5W small glass

9417.2  $70$45 tail light w/ mount, 2 15mm bulbs
9400 xx top: 6V 10W, small glass, with resistor
9400 xx bottom: 6V 5W small glass

04818 x 0$8 bulb housing for 9400, 9401, 9417
04818 x says 19314, small glass BL, no resistor

04818.1 $15 bulb housing 9400.1,9401.1,9417.1
04818.1 says 19477, large glass BL, no resistor

04818.2 $15 bulb housing 9400.2,9401.2,9417.2
04818.2 says 19314 behind resistor

18596 x 0$1 lens screw for 9400 #6 x 1-1/2″

18596.1 0$2 lens screw longer #6 x 1-3/4″
04818.2 for when the screw posts break off

04818 x $15 red lens with clear bottom original
04818 x says CEV 210, original with side reflectors

213452  $15 red lens with clear bottom replica
04818 x says nothing, with no side reflectors

04814 x $50 tail lamp body for 9400, says 19317

04815 x $50 tail lamp body for 9401, says 19318

04927 x $45 tail lamp body for 9417, says 19845

19609 x 0$3 fender mount rubber for 9400 series

10628.2 0$2 bulb 6V 5W small glass, see bulbs

10628.3 0$2 bulb 6V 10W small glass, see bulbs

10629.2 N/A bulb 6V 15W large glass, see bulbs

Left CEV 04818, right 04818.1

19626 x 0$6 resistor 3.9 Ω 10W, original is 4Ω

19626.1 0$5 resistor 6.8 Ω 10W, for brighter BL

22222 xx $2 mount bolt for 9401 M6x40 all-thread

 

 

 

 


Replica CEV Tail Lights

9417 replica

9417 replica  $40  single bulb dual filament 12V 10/5W

 

 

 

 

 

 

 


ULO Tail Lights

Many European mopeds have ULO tail lights, made in Germany.

ULO “early” replica

ULO “late” original

Peugeot 103 SP tail light assembly

 

 

 

 

 

 

 

 

 

 

 

 

 

Under construction.