23
VALVE AND VALVE SEAT LAPPING
After finishing, the valve and seat should be lapped in order to make them seal properly.
Spread a thin layer of silicon carbide on the working bevel of
the vale, and use a valve suction cup tool. Then repeatedly
rotate the valve suction cup to lap the valve and valve seat
evenly, until they match tightly.
• Before lapping, clean the valve, valve seat and valve guide.
• When lapping do not use too much force.
• During lapping, do not drop any silicon carbide into the place
between the valve lever and the valve guide.
VALVE AND VALVE SEAT AIR IMPERMEABILITY INSPECTION
After lapping the valve and valve seat, the air impermeability of the joint surface should be in-
spected.
Method One:
same as the method of “valve seat contact position inspection”.
Method Two:
evenly draw several lines on the working surface of the valve with a pencil. Put the
valve into the valve seat, if the lines are all broken after turning 1/8 ~ 1/4 ring, then it shows the air
impermeability is good.
Method Three:
mount the valve on the cylinder head, and fill the inlet and
exhaust vent with non flammable solvent, and preserve for 5 minutes, if there
is no leakage, the valve is seated correctly.
Summary of Contents for Talon 150 DLX Series
Page 1: ...Talon 150 GX FX DLX Series Service Manual...
Page 4: ......
Page 8: ...4 LOCATION OF PARTS...
Page 76: ...72...
