Rato R160, Service Manual

Page: 22 / 78

16
Ring width
：
first/second
Oil
3.7-3.9 mm
2.95-3.15 mm
1.37mm
2.0mm
Connecting
rod
Small end I.D
Big end I.D
Big end oil clearance
Big 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 Crankshaft pin O.D 35.975-35.985 mm 35.92mm
Valves
Valve clearance
Stem O.D
Guide I.D
Stem clearance
Seat width
Spring free length
IN
EX
IN
EX
IN/EX
IN
EX
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
Journal O.D
IN
EX
6.59 mm
6.07 mm
15.966-15.984 mm
33.58mm
32.88mm
15.92mm
Crankcase
cover
Camshaft holder I.D 16-16.018 16.048mm
Carburetor
Main jet
Float height
Pilot screw opening
Φ 2
1-3
--
--
--
--
Spark plug Gap 0.7-0.8mm --
Spark plug
cap
Resistance 9.5-10.5k Ω --
Ignition coil
Resistance
Air gap
Primary coil
Secondary coil
0.6-0.9 Ω
5.6-6.9k Ω
0.3-0.5mm
--
--
--
1-3-10 R440
Parts Item Standard Service limit
Engine
Maximum speed (No load)
Cylinder compression
3750-3850rpm
≧
1.2Mpa
（
1400rpm
）
--
Cylinder Sleeve I.D 92-92.015mm 92.17mm