Nervor Motorcycle Engines

Manufactured by Établissements Chapolard - Goubet et Fils, based in Bourg-en-Bresse (Ain)

Nervor supplied engines to its parent company, Radior, and also to other motorcycles firms including Follis, Hirondelle, Hurtu, Lucer, Saarperle, Talbot, Tendil and Verlor.

Engine Models:

Type B 100 cc two-stroke single-speed
Type C 100 cc two-stroke single-speed
Type D 100 cc two-stroke single-speed
Type E1 125 cc two-stroke single-speed
Type E2 125 cc two-stroke single-speed
Type E3 125 cc two-stroke single-speed
Type G1 125 cc two-stroke four-speed
Type G2 125 cc two-stroke four-speed
Type G3 125 cc two-stroke four-speed
175cc two-stroke 62 x 75.5 mm
250cc two-stroke twin

See also Radior

Sources: OTTW, Cycle Memory

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Oct 9, 2025
davelloyd dot jones04 at gmail dot com
Nervor 175cc engine
Hi, I have a nervor 175 cc engine totally dismantled
The motor has a 62mm bore with a 57.5 mm stroke. The engine number is 4386. The unit is off a 1955 Magnat Debon
I need exploded view diagrams of this motor to allow me to rebuild it.
Hoping you can help
Regards Dave Jones The following PDF has diagrams of the Nervor 125 from 1952 - I imagine it will be very similar. Ed.
https://cyclememory.org/doc/B-1-0000000983/B-1-0000000983.pdf

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