Pretty much the same engine as the CB125/185/200 XR/XL and everything else single cylinder ohc from 1971 on.
Biggest change was ignition system. Timing is is easier than falling off a log. Either you remove left engine cover to get to timing marks on generator rotor or it has two plugs, one to turn engine and one to look at timing mark. Set a 'F' , remove left cover on cylinder head (the one that says CDI
) and check the lines line up.( one on rotor and one on fixed coil) unless its full of condensation or been under water (possibly) the advancer could be stuck (unusual but possible, springs can break as well)
Lots of fun and silliness. They have about 12bhp stock but there is so much tuning stuff you can get double that (well, 23.4bhp on dyno, close enough
)
PJ
