how do i fix my honda cb 400 suprer four?

suck squeeze bang blow when u test the spark plug try testing the compression at the same time what is the spark like ? lightning blue ? or a dull spark ? what is coming out of the exhaust while it is turning over ? smoke rings blue ? more info needed to diagnose exactly as it it could be anything from a worn valve seat / blown head gasket / timing anything

Mr P Allen 22years in the trade :)
December 2004

well if you have fuel and a spark, the timing could be way way out, or the fuel mix way way too lean/rich, or you dont have any compression

matt
December 2004