Linhai Mini 80 User Manual

CHAPTER 3A ENGINE 260/ 300 / 400 cc ATV SERVICE MANUAL09.0
CHAPTER 3 ENGINE PAGE. 3A- 32
3. Measure:
zValve seat width ○
a
Out of specification → Reface the valve seat.
Valve seat width:
Intake:
0.9-1.1mm
<Limit:1.6mm>
Exhaust:
0.9-1.1mm
<Limit:1.6mm>
Measurement step:
zApply Mechanic’s blueing dye (Dykem)c to
the valve face.
zInstall the valve into the cylinder head.
Press the valve through the valve guide and
onto the valve seat to make a clear pattern.
zMeasure the valve seat width. Where the valve
seat and valve face made contact, blueing will
have been removed.
zIf the valve seat is too wide, too narrow, or the
seat is not centered, the valve seat must be
replaced.
4. Lap:
zValve face
zValve seat
NOTE:
After replacing the valve seat, valve and valve
guide, the valve seat and valve face should be
lapped.
Lapping steps:
zApply a coarse lapping com pound ○
a
to the
valve face.
CAUTION:
Do not let compound enter the gap between the
valve stem and the guide.
zApply molybdenum disulfide oil to the valve
stem.
zInstall the valve into the cylinder head.
zTurn the valve until the valve face and valve
seat are evenly polished, then clean off al com
pound.

Linhai Mini 80 Specifications

General

Brand	Linhai
Model	Mini 80
Category	Offroad Vehicle
Language	English