Building Up Of Cylinder Head - Panterra Fusion Service Manual

NIKOTA USA: PANTERRA SCOOTER SERVICE MANUAL
7. Cylinder Head Valve
5. Trim valve seat to assigned
seat width and valve seat width
with 45 degree chamfered cutting
tool.
Standard valve: 1.0 mm (.393 in.)
Check contact place of valve
seat.
6. Polish with 30-degree
chamfered cutting tool if he
contact place is too high. Trim to
assigned width with 45-degree
chamfered cutting tool. Polish
valve contact surface with emery
and polishing bar after correcting
bar.
7. Wash and clean cylinder and
valve after polishing and grinding.
Rotate and press softly
when polishing. Don't put
emery into valve and valve
guide pipe when polishing.
8. Spread red ink on 45-degree
seat surface and confirm if the
center of the contact surface of
the valve is even after correction.

Building Up of Cylinder Head

1. Build Up Spring Seat
Use new oil seals when
reassembling.
2. Spread engine oil on valve
stem and put into valve guide.
3. Build up inner and outer valve
spring and put in valve collar
using spring compressor.
CHAPTER 7: CYLINDER HEAD VALVE
CONTACT PLACE
TOO HIGH
6a
CONTACT PLACE
TOO LOW
6b
7-13
5
3
83
1.2mm
(.047 in.)
45˚
VALVE SEAT
SURFACE WIDTH
32˚
VALVE SEAT
SURFACE WIDTH
60˚
SPRING
VALVE
COMPRESSOR