Rato R80, Maintenance Manual, Page: 11 / 79

Part I Introduction
7
Camshaft
Cam height Intake
Exhaust
Outer diameter of journal
27.7mm
27.75mm
13.984mm
27.45mm
27.50mm
13.916mm
Crankcase
cover
Inner diameter of camshaft bore 14.0mm 14.048mm
Carburetor
Master nozzle
Float height
Turning circle of adjusting screw of
mixing ratio
0.85
13.7±1.5mm
2-1/8 circle
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--
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Spark plug Clearance 0.7-0.8mm --
Spark plug
cap
Resistance 7.5-12.5kΩ --
Ignition coil
Resistance
Ignition coil
clearance
Primary side
Secondary
side
0.8-1.0Ω
5.9-7.1kΩ
0.4-0.6mm
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1-3-3 R300-V
Part Item Standard Service limit
Gasoline
engine
Maximum no-load speed
Cylinder pressure
3750-3850rpm
≧
1.1Mpa
（
1400rpm
）
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Cylinder Cylinder bore diameter 80.0-80.015mm 80 .17mm
Cylinder
head cover
Warping -- 0.10mm
Piston
Outer diameter of piston skirt
Piston-cylinder clearance
Inner diameter of piston pinhole
Outer diameter of piston pin
79.975-79.985mm
0.015-0.04mm
15 .002-15.008mm
14.992-14.998mm
79.85mm
0.12mm
15.242mm
14.95mm