KEEWAY ARN150 - Important Standard Engine Dimensions

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I ．
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． S o m e i m p o r ta n t s ta r da r d d ime nsi o n s （
（（
（ E N G I N E ）
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Cylinder head/valve
ITEM STANDARD
Air pressure in cylinder 13±1kg/cm
2
Inlet 0.12~0.16mm
Valve clearance
Exhaust 0.12~0.16mm
Inlet 29.625±0.05
Camshaft cam impeller height
Exhaust 29.038±0.05
Inlet 4.975~4.990 mm
Valve tappet
Exhaust 4.955~4.970 mm
Inlet 5.000~5.012mm
Valve pipe
Exhaust 5.000~5.012mm
Inlet 0.010~0.037mm
Valve
Valve shaft-valve pipe
clearance
Exhaust 0.030~0.057mm
Inner spring 32.3±0.05mm
Natural distance of spring
Outer spring 35.0±0.05mm
Cylinder/piston
Item Standard
A B
Cylinder inner diameter 52.400~52.405mm
52.405~52.410 mm
Piston diameter 52.370~52.375mm
52.375~52.380mm
Cylinder and piston
Clearance of piston and cylinder 0.025~0.035mm 0.025~0.035mm
Piston pin hole 15.002~15.005mm
15.005~15.008mm
Piston pin
Piston pin 14.997~15.000mm
15.000~15.003mm
第一道环
0.013-0.045mm
Clearance of piston
ring and groove
第二道环
0.013-0.045mm
第一道环
0.1-0.2mm
第二道环
0.1-0.2mm
Piston ring
活塞环开口间隙
油 环 0.3-0.4mm