This page is archived (with minor modification) from the original site by Martin Schenker
Identify a JAP engine
As an example: An engine with the letters KY/C on the crankcase is a 500 ccm sv, built in 1928|
Two-stroke JAP numbers include F2UH, a 3 speed unit-construction single with iron barrel and head.
This page was copied and converted to english from the Danmarks Veteran Motorcykleklub.
Another source of JAP serial numbers:
The original version of this page saved from http://web.archive.org/web/20041010132218/http://www.mpimg-berlin-dahlem.mpg.de/~schenker/jap.htm