Operation Manual

13
ENGINE SPECIFICATIONS
ENGINE
SPECIFICATIONS
CYLINDER HEAD
<Distortion limit>
<0,03 mm>
* The lines indicate measurement at a right angle
CYLINDER
Diameter
56,00 ~ 56,02 mm
MODEL
GPR 125 Racing
Conicity limit
Ovality limit
0,05 mm
0,01 mm
PISTON
Cylinder-piston play
<Limit>
Diameter of piston “D”
Measurement point “H”
Piston off-set
0.045 ÷ 0.050 mm
<0.10 mm>
55.950 ÷ 55.955 mm
10 mm
0,5 mm
PISTON RINGS
Top ring:
Type
Dimensions (BxT)
Top ring (ignition)
Bottom ring
Gap between points (fitted)
Top ring
Bottom ring
Side play (fitted)
Top ring
Bottom ring
Keystone
1.2 x 2.4 mm
1.2 x 1.89 mm
0.300 ÷ 0.450 mm
0.300 ÷ 0.450 mm
0.020 ÷ 0.060 mm
0.035 ÷ 0.070 mm
T
B
CRANKSHAFT
Width “A”
<Warp limit “C”>
Connecting rod bottom play “D”
< Connecting rod top play limit “F”>
57.90 ÷ 57.95 mm
<0.03 mm>
0.2 ÷ 0.7 mm
<0.026 ÷ 0.040 mm>