Derbi GPR125 Workshop Manual page 21

1 - GENERAL INFORMATION
ENGINE
VALVE DIAMETERS (A)
Inlet
Exhaust
WIDTH OF VALVE SEATS (B)
Inlet
Exhaust
VALVE STEM DIAMETER
Inlet
Exhaust
VALVE GUIDE INTERNAL DIAMETER (A)
Inlet
Exhaust
VALVE STEM – GUIDE PLAY LIMIT
Inlet
Exhaust
VALVE WARP
Inlet
Exhaust
21
21,90 - 22,05 mm
18,70 - 18,85 mm
2,33 - 2,63 mm
2,82 - 3,12 mm
3,97 - 3,98 mm
3,96 - 3,97 mm
3,97 - 3,98 mm "A"
3,97 - 3,98 mm
0,015 - 0,042 mm
0,015 - 0,042 mm
0,01 mm
0,01 mm
"A"
"B"