1988-1992 Suzuki LT250R Service Manual, Page 20Get this manual
2-7 PERIODIC MJ;INTENJNCE AND TUNE-UP PROCEDURES
TRANSMISSION OIL
Replace TMTMTMTMTMTMTMTMTMTMat month and Every monthsAfter long pJ1iOd of use, the transmission oil will deteriorate and quicken the wear of sliding and interlocking sur acesF:eplace the transmission oil periodically fol16wing the procedure belowG Place the vehible on the level ground Start the endine to warm up the oil, this will facilitate drailTl ing of oilShut off the engineRemove the il fillel' cap CD and drain TMTMTMTMTMTM, and drain theoil completely Tighten the drain plugI
Tightening tJque
Pour the specified amount of oil, which is good qUality] SAE 20W-40 multi-grade oil, into the transmission case