Vento Phantom R4i - Cylinder; Piston; Cylinder Head;Valve

VENTO MOTORCYCLES
Rev no.01/ page 47of 84
Cylinder head/valve
Cylinder / Piston
ITEM STANDARD
CYLINDER PRESSURE 12±1kg/cm
2
Inlet 0.03~0.05mm
Valve clearance
Exhaust 0.05~0.06mm
Inlet 26.72±0.05
Cam shaft cam lobe height
Exhaust 26.68±0.05
Inlet 4.970~4.980 mm
Stem OD
Exhaust 4.955~4.965 mm
Inlet 5.000~5.012mm
Stem ID
Exhaust 5.000~5.012mm
Inlet 0.020~0.042mm
Valve
The clearance
between valve stem
and valve guide.
Exhaust 0.035~0.057mm
Inner Spring
32.8mm
Spring free length
Outer Spring 35.55mm
A B
Inner diameter of cylinder(Bore) 52.400~52.405mm
52.405~52.410 mm
Diameter of piston 52.370~52.375mm
52.375~52.380mm
Cylinder, piston
Clearance between piston and
cylinder
0.025~0.035mm 0.025~0.035mm
Piston pin OD 15.002~15.005mm
15.005~15.008mm
Piston pin
Piston pin ID 14.997~15.000mm
15.000~15.003mm
The first ring 0.013-0.045mm Clearance between
piston ring and
groove
The second
ring
0.013-0.045mm
The first ring 0.1-0.2mm
The second
ring
0.1-0.2mm
Piston ring
Clearance between
piston ring and
hatch
Oil ring 0.3-0.4mm