MotoGP God
Posts: 18,275
Join Date: Apr 2002
Location: Oxford
Mood: Its ONLY a Bike Club
Andy what have you changed I take it you have changed the coil, the CDI unit, spark plugs, I know you say its sparking but a break in a HT wire or plug itself would still give a spark but may cause problems under load.
As suggested a compression check is needed in case valves aren't seating
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