Hesitation on over run?

[crashrepairman]

I'm guessing its carb related? but my 1000 runs fine except on over run and now poor idle. Any suggestions please.

[alexmcguffie]

Can you describe what it does on over run?

[bmcecosse]

Welcome to the forum! And - I agree with Alex - how can it be poor on 'over run'...more detail please..... For 'idle' - check if the air cleaner is soaked with oil/muck - are the breather tubes from the rocker cover clear and clean ? Is there a little oil in the carb damper chamber? And - is the vacuum advance working correctly on the dizzy - suck it and see if the base plate moves......

[crashrepairman]

Hi, thanks, Only on over run it feels like hesitating, jerking. Ok at constant speed or acceleration. Must be the carb??? sticky needle??

[crashrepairman]

air filter is new, vacuum advance is working.

[bmcecosse]

Easy check - does the carb piston rise easily with finger pressure - and fall back down with a nice 'clunk' ? And -what colour are the spark plugs after a run?