Derbi GPR 125 Racing, Workshop Manual

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1 - GENERAL INFORMATION
20
ENGINE
CYLINDER DIAMETER
CAT M
CAT N
CAT O
CAT P
CYLINDER WARP
CYLINDER-PISTON ASSEMBLY
CYLINDER HEAD WARP SET
ENGINE COMPRESSION VALUE
Standard
Minimum
VALVE ADJUSTMENT VALUE
Inlet (engine cold below 35ºC)
Exhaust (engine cold below 35ºC)
MAXIMUM CAMSHAFT WARP
Inlet
Exhaust
MAXIMUM CAMSHAFT AXIAL PLAY
Inlet
Exhaust
CAM SIZE
Inlet “A”
Inlet “B”
Inlet (lifted) “C”
Exhaust “A”
Exhaust “B”
Exhaust (lifted) “C”
TIMING CHAIN
Type
Timing chain tensioner
58,010-58,017 mm
58,017-58,024 mm
58,024-58,031 mm
58,031-58,038 mm
0,05 mm
0,050-0,064 mm
0,05 mm
more than 15 kg/cm
2
13 Kg/cm
2
0,012 - 0,015 mm
0,015 - 0,020 mm
0,008 mm
0,008 mm
0,4 mm
0,4 mm
31,44-31,54 mm
23,95-24,05 mm
7,49 mm
30,81-30,91 mm
23,95-24,05 mm
6,86 mm
92RH2005 114 links
Automatic (ratchet)
B
A
C