A bike that was left parked for years with gas in the tank might need the carbs cleaned
but first get a pint of SeaFoam from Walmart and run an ounce per gallon (4 ounces per tank) thru the bike, maybe for 400 miles, and see if it clears up.
If the bike has old gas in the tank and it could be more than 6 months old, drain that out first. I dont know what to do with old gas, maybe put it in your car, one gallon per tank of fresh gas, to get rid of it.
Last edited by KCW; 05-14-2018 at 01:51 PM.