1985-1990 Suzuki LT50 Service Manual, Page 15Get this manual
PERIODIC MAINTENANCE AND TUNE -UP PROCEDURES
TRANSMISSION OIL
Change Initial month and
Every months
After long period of use, the transmission oil
Qualities will deteriorate and quicken the wear of sliding and interlocking surfacesReplace the transmission oil periodically following the procedure below Start the engine to warm up the oil, this will facilitate draining of oil Unscrew the oil filler cap and drain plug, and drain the oil completelyTighten the drain plug Supply good quality SAE 20W 40 multi grade motor oil500 ml (0.53 US qt)