Valve And Valve Guide - Panterra Fusion Service Manual

80
7. Cylinder Head Valve

Valve and Valve Guide

1. Check if valve is beat, burnt or broken.
2. Check if valve and valve guide are blocked.
3. Measure every valve stem's outer diameter.
•Used limit: Change if below 4.9mm.
Remove carbon deposits from valve
guide using a reamer.
Rotate reamer in proper direction and
do not stop rotation to push in or pull
out.
4. Measure inner diameter of every valve
guide.
Used limit:
IN: Change if above 5.3mm.
EX: Change if above 5.3mm.
Valve guide replacement
1. Operate cylinder at the temperature of
about 100 C-15
˚
Heat cylinder head quickly and evenly
to prevent warping.
2. Press, cut or pry out the valve guide.
Be careful to not damage cylinder head
surface.
C 212 F.
˚ ˚
NIKOTA USA: PANTERRA SCOOTER SERVICE MANUAL
3
VALVE PIPE REAMER
2
7-10
1
VALVE GUIDE
SCREW DRIVER
TO PRY OUT
GUIDE
CHAPTER 7: CYLINDER HEAD VALVE