MAINTENANCE
9
Valve clearance adjustment 2-7
气门间隙调整
There always be clearance between valve end and its transmitted parts, in case of contraction
which would affect engine work. If the clearance is in excess, it would result in higher
back-pressure and higher noise (abnormal noise from valve) and decrease engine
performance. If the clearance is insufficient, it would make the valve can’t be sealed totally,
which might result in abnormal performance or burning the working surface of relevant parts
of valve.
Generally, after 100h or 1 year using, you have to check the valve clearance and adjust it.
! Disassemble these parts in turn: spark plug cap, spark plug, cylinder head cover and
gasket.
!
! Pull the starter coil to make the piston on the top dead center.
! Measure the clearance of valve.
! If the clearance is beyond the standard, please adjust it.
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