Sym jet red devil?
Answers:
it could be one of several things. i'm not really familiar with your bike but here goes. did u check the reed valve? assuming it has one. float bowl level? are you running the correct 2 stroke oil? did u run a compression test? have you completely thrashed the poor little machine? are you running a too cold spark plug? is the gas worth a crap that you have been mixing with your oil? are you mixing it at the correct ratio? if you answered yes to all these questions then you probably already have the solution.
Always give year, make, engine size and model # when asking questions. If it's more then a couple of years old, it might need piston & rings. If the top end were worn out, the oil in the fuel mixture wouldn't completly burn. The spark plug would oil up and blow exess smoke out the exhaust. Oil pumps on 2 strokes made after 2000 usually aren't adjustable.
Sounds like the automatic choke has stuck on.A really common problem with alot of twist and go's.
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