2002 Yamaha YFM660 Grizzly factory service and repair manual, Page 44Get this manual
MAINTENANCE SPECIFICATIONS Item 2nd ring
Standard
Type Dimensions (B T) End gap (installed) Side clearance Oil ring
Taper 1.2 4.0 mm (0.0472 0.1575 in) 0.300.45 mm (0.01180.0177 in) 0.030.07 mm (0.00120.0028 in)
0.80 mm (0.0315 in) 0.13 mm (0.0051 in)
Dimensions (B T) End gap (installed) Side clearance Crankshaft:
2.5 3.4 mm (0.0984 0.1339 in) 0.20.7 mm (0.00790.0276 in) 0.060.15 mm (0.00240.0059 in)