Starts ok,appears to be missing,took me 20 mile run before it cleared itself.Bike stood overnight same problem persists

ckeck the plugs and wires

Try replacing or cleaning your spark plugs.

the carb jets might need to be cleaned along with the air filter

your spark plugs need to be replaced.

Hi
Check/replace inline fuel filter. Put a fuel injector/carb cleaner fluid in the tank and run it through, this will clean any build up that may be in carbs/injectors.
If problem is still persisting then you'll need to get carbs/injectors removed for cleaning and resetting. Hope this helps, let me know how you get on.

Jason

If the bike was stored the fuel could be stale, use some fuel stabilizer or drain and refill. Check the spark plugs to see if they have fueled up because of the stale fuel.

ok buddy change plugs as they break dwn and when they cool they work again get back to me with results also new fuel maybe??

DRAIN CARBS FROM PETCOCK AT BOTTOM OF EACH CARB MAKE SURE FUEL DRAINS COMPLETELY THEN TURN FUEL BACK ON, IF THIS IS AN INJECTED MODEL DRAIN TANK AND FLUSH THEN RUN IT HARD FOR 20 MILES OR SO, MAKE SURE YOUR OIL LEVEL IS OK

If you need further help, I’m available over the phone at https://www.6ya.com/expert/michael_00678fd4800d19c5

Because the problem you describe is intermittent, it is almost certainly fuel related, either the fuel itself or the carbs on your bike.

Before taking it to a dealer or mechanic (or trying to fix it yourself), get a can of Seafoam (I know Autozone has it) and add it to the fuel. It seems to do an excellent job of cleaming out whatever bad stuff accumulates in fuel systems over time, especially carburetors.

There's an interesting review of it at: http://www.webbikeworld.com/sea-foam/

try some Berrymans B12 fuel additive in the tank. if your bike has been in storage it could be gummed up a bit. put in a little more than stated dose, no more than double, run it let it get hot and then let it stand overnight. it worked for me on my v star