April 29, 200818 yr Hi, Be great if anybody could help - I have the opportunity to acquire B40GB engine no. 4640 with different frame number, I can't make head nor tail of which year this machine would be etc on the bsa owners website list can anyone help? Thanks Manzi
April 30, 200818 yr Hi Guy's Hi Yes I think Big "J" is right. The "F" engine was 1965-66 and the "G" from 66-7 this is the engine with the oil fed from the end of the crank. The "B" signifies it was one of the engines built for the British army,there were others that had different letters IE "D" for Danish army. The G"B" engine also has wide ratio gears so should make it fine for trials without modification. You can also fit a Victor ally barrel if shortened slightly. Hope this helps. Regards Charlie. PS Good luck to all you boys (and Girls) in the two Scottish trials. and to first timer OTF.
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