Jap engine dating
The whole bike and engine are a sort of updated technology version of the Brough Superior and the JAP engine.The engines are even made to mate up to Harley Davidson transmissions and can be supplied with fuel injection.ion=1&espv=2#q=dating JAP engines Cheers Scott PS: Is your engine a 2 cylinder cosmo?Hi Cosmo, TOMM ran a two part article on the JAP 2S in June/July and August/September 2004. Sorry, my scanner has died, so I can't send you a copy.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.
The new Brough Superior has the flexibility of putting the JAP name on new designs. 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. Prestwich Industries Ltd., Northumberland Park, Tottenam, London N17, England. Peter At the air case in front of the engine its a logo stamped in with the numbers 1945 ..maybe the date. The articles are very useful, with cutaway drawings etc. They also cover operating instructions and maintenance information like valve and points settings, and lots of other useful information. ) was still advertising copies of the handbook a few years ago when I got mine - I haven't bought a copy though, because the TOMM articles cover the engine very well.
The 2S, according to the article, is a vertical, side valved, air cooled four stroke petrol engine. 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.