1957 D4 bicycle engine - the first generation
of the Krasnõi Oktjabr factory's "D" series
Photos: Jaan Kelner
[Refs: WDVID401, WDVID402]
2005 home-made cyclemotor with a D8m bicycle
engine produced in the mid-1980s in the Russian KO
(Krasnõi Oktjabr) factory.
Photo: Luke Booth
[Ref: PDVI0001]