It sounds like a valve clearance problem to me (valves not closing until cylinder head temp increases due to expansion)
Check your valve clearances.
Tiny
Check your valve clearances.
Tiny
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Cheers for the reply mate, that was my thought too when i got the reading from the pulse generator. Have tried swapping the coil for one that does work, didn't make a difference, connected timing light to HT leads, so i wouldn't thought a spark plug would affect the light from flashing with the pulse through the HT lead.Try a different pulse generator, but if it was at fault I'd expect all four plugs to be misfiring. The only thing common between cylinders two and three is the coil, unless you've got two bad spark plugs. Try swapping your coils over and see what happens. Good hunting!
Have been thinking it may be the C.D.I unit, but the guys at work don't think so.
Do you know a way of checking a C.D.I unit?
Wait, I just re-read your original post, are you saying there's no spark as in the spark plugs aren't firing or no spark as in the cylinders aren't making combustion? Because that is two totally different problems. No spark, check plugs, work backwards from there. No combustion, could be (as generator said) check valve clearances are correct, check carbs are balanced properly and clean and tuned properly. Let us know. Thanks
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