
4 - ENGINE
106
VALVE GRINDING
1. Eliminate:
- Carbon sediments (of the surface of the valve seat).
2. Inspeccione:
- Valve seats.
Grooves/wear => Grind the valve.
- Apply blue mechanical dye (Prussian blue) to the valve
face.
- Fit the valve into the cylinder head.
- Press the valve against the guide and against the seat to
make a visible mark.
- Measure the width of the valve seat.
Where there is contact between the seat and the valve face,
the dye will indicate this.
- If the valve seat width is large or small, or if the seat is not
centred, it has to be redone
WIDTH OF VALVE SEATS (B)
Inlet:
2,33 - 2,63 mm
Exhaust:
2,82 - 3,12 mm
Outside that specified => Grind the valve.
3. Grind:
- Valve face.
- Valve seat (Cylinder head)
AFTER RECTIFYING THE VALVE
SEAT OR REPLACING THE VAL-
VE AND ITS GUIDE, THE SEAT
AND FACE MUST BE GROUND.
“B”
N.B.
Содержание GPR 125 Racing
Страница 1: ...WORKSHOP MANUAL GPR 125 4 stroke ...
Страница 30: ...2 PDI Pre delivery inspection 30 2 PDI Pre delivery inspection PDI Pre delivery inspection 31 2 1 ...
Страница 169: ...6 COOLING SYSTEM 169 6 1 DIAGRAM OF THE SYSTEM ...
Страница 170: ...6 COOLING SYSTEM 170 ...
Страница 179: ...7 LUBRICATION SYSTEM 179 7 1 DIAGRAM OF THE SYSTEM ...
Страница 180: ...7 LUBRICATION SYSTEM 180 ...
Страница 192: ...8 CHASSIS 192 FITTING FRONT SUSPENSION ...
Страница 202: ...9 BRAKING SYSTEM 202 9 BRAKING SYSTEM FRONT BRAKE REAR BRAKE 203 211 9 1 9 2 ...
Страница 247: ...Rev 0 2009 ...