2000 Yamaha YFM400FWA(M) Factory Service workshop Manual, Page 29Get this manual
MAINTENANCE SPECIFICATIONS Item 2nd ring
Standard
Type Dimensions (B T) End gap (installed) Side clearance Oil ring
Taper 1.2 3.6 mm (0.0472 0.1417 in) 0.40.6 mm (0.01570.0236 in) 0.030.07 mm (0.00120.0028 in)
0.95 mm (0.0374 in) 0.13 mm (0.0051 in)
Dimensions (B T) End gap (installed) Crankshaft:
2.8 2.8 mm (0.1102 0.1102 in) 0.20.7 mm (0.00790.0276 in)