1988-1991 Yamaha Sno Scoot SV 80/E Snowmobile Service Manual, Page 61Get this manual
_ PISTON RINGS 1Measure: Side clearance of specification Replace piston and or ringsUse Feeler Gauge CD
, Standard Top ring 2nd ring 2Install: 0.020.06 mm (0.00080.0024 in) 0.030.07 mm (0.00120.0027 in)
Limit 0.10 mm (0.004 in) 0.10mm (0.004 in)
Piston ring (Into the cylinder) Push the ring with the piston crown
3Measure: End gap Out of specification Replace rings as setUse Feeler Gauge CD