Polybus, Grumpy & ODK members, firstly Grumpy you are correct with the year No's, it would be 37 or 57 (my guess 37), secondly Grumpy you give me too much credit of knowledge, Voljon is the man that knows more about the JAP, and as for your asumption with the magnito's go, the ones I have seen all have the Wipac maggies, but in all the manuals I have seen state the Wico as standard eqipment, so I cant figure that one out either, I will post a link to a site were you will find the manual Polybus for the 6 as it may breach copyright to post the manual, you do have to register but it is free and a clean site.
Internal Fire museum of power And Polybus the second set of numbers on my engine as far as I have been able to establish hold no meaning to the JAP company, my engine was ex Public works department so could have been just for thier records. Also the last digit in your number would indicate something specific about the engine, I was told by Voljon that the 6 in my No indicated it was fitted with a non standard part. My engine is also the only one I have seen that did not have the "LONDON" under the JAP on the crankcase, relavance?? I do know that JAP was later sold to Norton Villiers. I have seen a couple of 6 cowles for sale on Ebay but have not seen a 4/3 yet
, Keep looking!
