The service manual recommends periodic maintenance every or 120 days to ensure longevity. Component Gearbox Oil Every 1,500–2,000 km Drain and refill with 0.65L of 20W40 oil. Spark Plug Every 10,000 km Clean and adjust gap; replace if fouled. Air Filter Every 3,000 km Clean in petrol, dip in 2T oil, and squeeze out excess. Drive Chain Every 500 km Clean and lube; adjust slack to 20–30 mm. Carburetor Clean to remove waste materials for better mileage. ⚙️ Engine and Transmission Tuning
: Includes motorcycle identification (frame and engine serial numbers), safety norms, and basic control functions like switch operation. yamaha rx 135 service manual