1985-1986 Honda ATC250R Shop Manual, Page 19Get this manual
MAINTENANCE
PERIODIC REPLACEMENT PARTS
Machines subject to severe use, or ridden in unusually dusty, or muddy areas, require more frequent servicingThe following table serves as guide in replacing parts when machines are used for competition
Every 30 hours
Seizure, damage, wear Seizure, damage, wear Seizure, chipped end, wear Seizure, wear, damage Worn electrode, improper gap, cracked insulator, fouling Emulsion Wear, damage Amount of recess: 2.0 mm maxWear Wear Wear indicator Wear indicator
Piston pin Piston rings Connecting rod big end bearing Spark plug Transmission oil Drive sprocket Chain slider and roller Drive chain Chain master ink Front brake pads Rear brake pads Front brake fluid Rear brake fluid