I think the MX4 Matchlessunit was margianlly the most powerful (42BHP@4,800 rpm)
Cheers
G
As far as I know, the LTOW JAP is also 42 BHP. Not that I think many engines are now standard. My JAP has modern pistons and a compression ratio that would spell disaster if the original cylinders were used
I like the look of the MAG engine, overhead inlet and side exhaust, just a very pretty engine.