Thump ATV110CC - Engine Quits or Wont Start

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IF YOUR ENGINE QUITS OR WON’T START
If you have a problem starting the engine or experience poor engine
performance the following information may help you. If you can’t correct
the problem, see or talk to your umpstar Certied Motorcycle Mechan-
ic.
Taking care of the Unexpected
SYMPTOM Engine starts, but runs poorly.
POSSIBLE CAUSE WHAT TO DO
idles roughly, too fast, stalls Check engine idle adjustment. Check fuel hose is not
blocked. If the problem persists, see or talk to your
umpstar Certied Motorcycle Mechanic.
runs erratically, misres See or talk to your umpstar Certied Motorcycle
Mechanic.
blubbers (rich fuel mixture) See or talk to your umpstar Certied Motorcycle
Mechanic.
sooty exhaust (rich fuel
mixture)
See or talk to your umpstar Certied Motorcycle
Mechanic.
detonates or pings under
load
If applicable, switch to the recommended octane gasoline
or change your brand of gasoline. If the problem persists,
see your Certied Motorcycle Mechanic.
aerres (backres) See or talk to your umpstar Certied Motorcycle
Mechanic.
pre-ignition (runs on aer
ignition switched OFF)
See or talk to your umpstar Certied Motorcycle
Mechanic.
SYMPTOM Fuel leaks from carburetor overow
POSSIBLE CAUSE WHAT TO DO
oat not adjusted right Remove carburetor and adjust oat correctly
debris blocking fuel
shut-o valve
Remove caburetor and clean the jet
SYMPTOM Does not start
POSSIBLE CAUSE WHAT TO DO
faulty kill switch Disconnect kill switch
no fuel Check carburetors getting fuel by removing drain screw
no spark Remove spark plug and do a spark test