Yamaha RST90GTZ, Service Manual

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SPEC
9-7
Item Description
Piston ring:
Top ring
Ring type Barrel
Dimensions (B
×
T) 1.00
×
2.80 mm (0.039
×
0.110 in)
End gap (installed) 0.33 ~ 0.45 mm (0.013 ~ 0.018 in)
Side clearance (installed) 0.030 ~ 0.070 mm (0.0012 ~ 0.0028 in)
Plating/coating Chrome plated/parkerizing
2nd ring
Top ring (same or no) No
Ring type Taper
Dimensions (B
×
T) 1.00
×
2.90 mm (0.039
×
0.114 in)
End gap (installed) 0.70 ~ 0.85 mm (0.028 ~ 0.033 in)
Side clearance (installed) 0.020 ~ 0.060 mm (0.0008 ~ 0.0024 in)
Plating/coating Parkerizing
Oil ring
Dimensions (B
×
T) 1.50
×
2.50 mm (0.059
×
0.098 in)
End gap (installed) 0.20 ~ 0.60 mm (0.008 ~ 0.024 in)
Side clearance (installed) 0.040 ~ 0.110 mm (0.0016 ~ 0.0043 in)
Crankshaft:
Measuring point 1 62.0 mm (2.44 in)
Measuring point 2 100.0 mm (3.94 in)
Width A 62.25 ~ 62.65 mm (2.45 ~ 2.47 in)
Width B 234.65 ~ 235.65 mm (9.24 ~ 9.28 in)
Crankshaft runout C 0.03 mm (0.0012 in)
Big end side clearance D 0.160 ~ 0.262 mm (0.0063 ~ 0.0103 in)
Crankshaft-journal-to-crankshaft-
journal-bearing clearance 0.027 ~ 0.045 mm (0.0011 ~ 0.0018 in)
Bearing color code 1 = Black, 2 = Brown, 3 = Green, 4 = Yellow, 5 = Pink,
6 = Red, 7 = White
Crank pin:
Crank pin outside diameter 37.976 ~ 38.000 mm (1.4951 ~ 1.4961 in)
Connecting rod:
Small end diameter 19.005 ~ 19.027 mm (0.7482 ~ 0.7491 in)
Big end diameter 41.000 ~ 41.018 mm (1.6142 ~ 1.6149 in)
Crankshaft-pin-to-big-end-bearing
clearance 0.033 ~ 0.050 mm (0.0013 ~ 0.0020 in)
Bearing color code 0 = White, 1 = Blue, 2 = Black, 3 = Brown, 4 = Green,
5 = Yellow
MAINTENANCE SPECIFICATIONS