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They do manufacture replacement parts for the originals as well which seems to be what Cameron Racing does.The new Brough Superior has the flexibility of putting the JAP name on new designs.Any information on the history of these motors would be helpful, sorry I cant post images as the file is too big and I dont know how to reduce them in size regards Cosmo Could be 1951 too.This one is a lot better then the first link I posted. engines in a couple of my small engines service manuals but not the model in your pictures. The company doesn't show up in my eighth edition of small engines service manual printed in 1966 so assume it went out of business around that time. Bill Discovered an air shroud that sold on ebay a couple of weeks ago that looks like the one on your engine. seriel number are C/1/72405/S at the bottom: BA68955 over the bottom underneath of the bracket for ignition: HB2 the top of the block:14831F.
top other side: MC19054 I found this info at ebay.. I need some different parts before i can start it . maybe a new piston, gaskets and maybe some carburetor parts since the petrol seems to owerflow right trough. Anders Norway Bit of History: JAP goes back to the 1920s and 1930's, they made big motorcycle V-twins and small two stroke engines. Prestwich, not Prestwick) Peter Peter, Thanks for pointing out the incorrect spelling of the name. Another good book to get hold of is "The JAP Engine" by A. Fenner, published by Arthur Pearson Ltd in the 1950's. The 4/3 was 288cc, 3.5bhp @ 2400rpm, Wico Mag CJ936 The Model 5 was 412cc, 4.5bhp @ 2200rpm, Wico Mag CJ936 The Model 6 was 588cc, 5.5bhp @ 1800rpm, Wico Mag CJ936 The Model 55 was 824cc, 8bhp @ 2000rpm, Wico Mag. When JAP failed as a company, they were bought by Villiers, who are still around today. Then Wipac (Wico-Pacey Corpn) was formed and they started manufacture in the UK. The C series is an all-metal magneto but the A series is a direct replacement and later on they probably went over to the A as it would have been cheaper than the imported C series. although i might have an electronic download i put up for you... i'll email it it to you later today oops i see you did post the numbers. if you have the time search online for the history of villiers. The industrial engine side was started after WWII and they made quite a range of engines, the largest being the Model 55 which was essemtially 2 X Model 5 engines on a common crankcase and an extra small flywheel at the other end of the crank. Zenith24T2I have a JAP engine handbook which gives service information like tappet clearances and ignition timing etc etc if you need more information. This book covers the motorcycle and industrial engines, including the racing V-twins as used on dirt-track bikes etc. When Wico started up in the UK, magnetos were imported from the USA. BTw when you get it to run, they always start first time.