HELP!! 247 aircooled mono goes well but despite new OEM Dellorto with std jetting still 'knocks' on overrun as returns to tickover- tried an OKO but ran far too weak- (reccomended 28mm OKO too big for 212 motor?)

Now trying a 24mm Keihin - bit better but now wondering if ageing reeds may be problem? any ideas, or where to get reeds for this model?

Cheers, Paul

i run a 28mm oko on a 245 no problems at all bill pye or bob wright are the fantic gurus stocking most parts

Crank seals ?

Thanks for prompt replies guys - should'nt be crank seals as sympton has existed scince full rebuild which included new crank seals. .P.H

Vacuum leak ? worn reed vales ? (not seating ?)

Glenn

Edited July 22, 201214 yr by axulsuv