Rato R160, Service Manual

Page: 17 / 78

11
1-3-6 R280
Parts Item Standard Service limit
Engine
Maximum speed (No load)
Cylinder compression
3750-3850rpm
1.1Mpa
（
1400rpm
）
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Cylinder
head
Sleeve I.D. 78.0-78.015mm 78.17mm
Cylinder
head
Warpage -- 0.10mm
Piston
Skirt O.D.
Piston-to-cylinder clearance
Piston pin bore I.D.
Piston pin O.D.
Piston pin-to-piston pin bore clearance
77.96-76.98mm
0.015-0.055mm
18 .202-18.208mm
18.192-18.198mm
0.004-0.016mm
76.85mm
0.12mm
18.242mm
18.15mm
0.08mm
Piston rings
Ring side clearance: first/ second
Oil
Ring end gap: first/second
Oil
Ring width: first/second
Oil
0.02-0.06mm
--
0.20-0.40mm
0.2-0.7mm
3.4-3.6mm
2.75-3.15mm
0.15mm
--
1.0mm
1.0mm
1.37mm
2.0mm
Connecting Small end I.D 18.211-18.222mm 18.27mm
39.0mm
camshaft
Cam height
Journal O.D
IN
EX
32.9-33.1mm
32.50-32.70mm
15.966-15.984mm
32.88mm
32.48mm
15.92mm
Crankcase
cover
Camshaft holder I.D 16.0mm 16.048mm
Carburetor
Main jet
Float height
Pilot screw opening
0.88
13.2mm
2-7/8 turns
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Spark plug Gap 0.7-0.8mm --
Spark plug
cap
Resistance 7.5-12.5k Ω --
Ignition coil
Resistance
Air gap
Primary coil
Secondary coil
0.6-0.9 Ω
5.6-6.9k Ω
0.2-0.6mm
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