1994-1995 Yamaha FX700 (FX1) Service Manual, Page 76Get this manual
REED VALVE, CYLINDER HEAD, CYLINDER AND PISTON
2; Install: Piston ring (Into the cylinder) Push the ring with the piston crown
3Measure: End gap Out of setUse thickness gauge
End gap Top 2nd
rings as a
0.2-0.4 mm (0.008-0.016 in)