This is a earlier edition to the 1933 J.A.P Engine Information Booklet previously published on Barnstormers. J.A.P.s popularity and demand was increasing and would do so even more with dirt track (or speedway) racing on the horizon. This booklet has a little more information than 1933, including a list of the range of engines, with bore and stroke and engine prefixes, Sports and Race engines included. There is a chart outlining valve and magneto timing, and additional diagram on oiling systems.
Click on the front cover below to see the complete 26 page manual.
It is a 5.3M PDF and you will need Adobe Acrobat Reader to view it.
Click here to see a copy of the 1927 J.A.P Sales Catalogue