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[vince]

Hi, a sticking exhaust valve feels just like a seizure lots of rattles from valve gear but without the zip noise. When it cools down the engine will start as normal. Also check if the fuel filter in carb banjo is blocked. Vince.

[Mark B]

Nobody's mentioned the coil yet. Your symptoms sound similar to mine when the coil was breaking down. It seemed like fuel starvation at the time; losing power, popping, engine feeling harsh etc. Ten minutes rest and all was well again, for the next ten miles...

[vince]

Hi, good point Mark B. When my coil started to go it gave symptoms similar to a blocked main jet. Engine would cut out if the tnrottle was opened up but would run at small openings. Once cooled down it would run ok. It was caused by a defective regulator overcharging. Vince

[PeteF]

Just a thought, condenser going bad? Cheap enough to change anyway. One symptom of a bad condenser is rough running when hot.

[Marko]

Hi Bandit12, re plugs an NGK B8ES is a cold-ish plug, B7ES warmer, B6es hotter and so forth. Champion spark plugs are the other way around i.e a N3 is cold and an N5 hot. I wouldn't say the plug youre using (an 8) is too hot. Hopefully by now you've fixed the bike & found the problem?