KEEWAY ATV250 - Some Important Dimensions -Engine; Cylinder Head;Valve

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Some important dimensions –engine
Cylinder head /valve
Project Standard
The pressure of the cylinder
12±1kg/cm
2
Intake 0.03~0.05mm
The valve interval
Outtake 0.05~0.06mm
Intake 36.63
The height of cam of the camshaft
Outtake 31.6
Intake 5975~5990 mm
Valve poles
Outtake 5955~5.970 mm
Intake 6.000~.012mm
Valve pipes
Outtake 6.000~6.012mm
Intake 0.010~0.037mm
Valve
The interval between the
valve pole and valve pipe
Outtake 0.030~0.057mm
Interior spring
32.3±0.05mm
The natural length of springs
Outside spring
35.0±0.05mm
Cylinder/piston
Project Standard
A B
The internal diameter of cylinder 69.005~69.01mm 69.000~69.005mm
The diameter of piston 68.97~68.985mm 68.985~68.98 mm
Cylinder、Piston
The interval between piston and cylinder
0.025~0.035mm 0.025~0.035mm
The pin hole of piston 17.002~17.005mm 17.005~17.008mm
The pin of piston
The pin of piston 16.997~17.000mm 17.000~17.003mm
The first ring
0.013-0.045mm
The interval between
piston ring and trough
The second
ring
0.013-0.045mm
The first ring
0.1-0.2mm
The second
ring
0.1-0.2mm
The ring of piston
The opening interval
Oil ring 0.3-0.4mm