Rato R80, Maintenance Manual, Page: 13 / 79

Part I Introduction
9
Outer diameter of journal 16.166-16.184mm 16.12mm
Crankcase
cover
Inner diameter of camshaft bore 16.2-16.218mm 16.248mm
Carburetor
Master nozzle
Float height
Turning circle of adjusting screw of
mixing ratio
Φ2
1-3mm
2-7/8 circle
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Spark plug Clearance 0.7-0.8mm --
Spark plug
cap
Resistance 9.5-10.5kΩ --
Ignition coil
Resistance
Ignition coil
clearance
Primary
side
Secondary
side
0.6-0.9Ω
5.6-6.9kΩ
0.3-0.5mm
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1-3-4 R420-V
Part Item Standard Service limit
Gasoline
engine
Maximum no-load speed
Cylinder pressure
3750-3850rpm
≧
1.2 Mpa (1400 rpm)
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Cylinder Cylinder bore diameter 90-90.015mm 90.17mm
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
Piston pin-piston pinhole clearance
89.96-89.97 mm
0.03-0.055 mm
20.002-20.008 mm
19.992-19.998 mm
0.004-0.016 mm
89.85mm
0.27mm
20.042mm
19.95mm
0.08mm
Piston ring Piston ring side clearance: top 0.02-0.06 mm 0.15mm