Suzuki DF25/DF30 Four Stroke Service Manual, Page 172Get this manual
POWER UNIT 7-55 PISTON RING TO PISTON Oil ring Apply engine oil to piston rings Install spacer first, then side rails to piston When installing spacer, do not allow ends to overlap in groove
Incorrect
Correct
1st ring and 2nd ring Apply engine oil to piston ring Install 2nd ring and 1st ring to piston
"RN" "R" Mark
11st ring 22nd ring 3Oil ring
NOTE: 1st ring ditters from 2nd ring in shape and color of surface contacting cylinder wallDistinguish 1st ring from 2nd ring by referring to figure As indicated in figure, 1st and 2nd ring are marked, "RN" or "R" When installing these piston rings, the marked side of each ring must face towards top of piston