UTV500CC User’s Manual www.UTVsFactory.com
29
Engine
middle and
high rotate
speed is
uneven
Mechanical problem
①
The force of Valve spring is
weak.
②
Cam axle worn out
③
Plug is dirty.
④
Gap of plug is too small.
⑤
Air circulation is not right.
⑥
Ignition loop problem
⑦
Floater of carburetor is too
lower.
⑧
Air filter is dirty.
⑨
Block in fuel pipe cause
fuel supply problem
⑩
Fuel pipe problem
Change
Change
Clean or Change
Adjust or change
Adjust or change
Change
Adjust the height of
floater
Clean or change
Clean
Change
Exhaust blue
smoke
Mechanical fault
①
too many lube
②
Piston ring worn out
③
Valve pipe worn out
④
Cylinder wall scratched
⑤
Valve rod worn out
⑥
Seal of valve rod broken
Drain the extra lube
Change
Change
Change
Change
Change
