Rato R80, Maintenance Manual, Page: 14 / 79

Part I Introduction
10
ring/ring 2
Oil ring
Piston ring closing clearance: top
ring/ring 2
Oil ring
Piston ring width: top ring/ring 2/oil
ring
--
0.2-0.4 mm
0.2-0.7 mm
3.7-3.9 mm
2.95-3.15 mm
--
1.0mm
1.0mm
1.37mm
2.0mm
Connecting
rod
Inner diameter of small end
Inner diameter of big end
Big end oil film clearance
Small end side clearance
20.011-20.022 mm
36.025-30.039 mm
0.25-0.65 mm
0.013-0.03 mm
20.07mm
36.07mm
0.12mm
1.0mm
Crankshaft Outer diameter of main journal 35.975-35.985 mm 35.92mm
Valve
Valve clearance
Outer diameter of
valve stem
Conduit inner
diameter
Lifter clearance
Valve seat contact
width
Free length of
spring
Intake
Exhaust
Intake
Exhaust
Intake/exhaust
Intake
Exhaust
0.013-0.017 mm
0.018-0.022 mm
6.565-6.580 mm
6.545-6.560 mm
6.6-6.615 mm
0015-0.055mm
0.015-0.055mm
0.65-0.95
38.8-39.2mm
--
--
6.44mm
6.4mm
6.66mm
0.11mm
0.13mm
2.0mm
37.5mm
Camshaft
Cam height Intake
Exhaust
Outer diameter of journal
6.59 mm
6.07 mm
15.966-15.984 mm
33.58mm
32.88mm
15.92mm
Crankcase Inner diameter of camshaft bore 16-16.018 16.048mm