2006-2009 Suzuki LT-Z50 QuadSport ATV Factory Service Manual, Page 86Get this manual
ENGINE REASSEMBLY
Reassemble the engine in the reverse order of disassemblyPay special attention to the following points: NOTE: Apply engine oil to each running and sliding surface before reassemblingPISTON RING AND PISTON Install the piston rings in the order of oil ring, 2nd ring and 1st ring The first member to go into the oil ring groove is spacer 1After placing the spacer, fit the two side rails 2NOTE: Side designations, top and bottom, are not applied to the spacer and side rails: Those can be positioned each either way
INCORRECT
When installing the spacer, be careful not to allow its two ends to overlap in the grooveCORRECT
Install the 2nd ring and 1st ring 1st ring has letter "O" marked on the sideBe sure to bring the marked side to the top when fitting it to the piston 2nd ring has letter "R" marked on the sideBe sure to bring the marked side to the top when fitting it to the piston