Replace annually. The Ninja 150RR is liquid-cooled, and neglecting this can lead to overheating. 4. Drivechain and Brakes Chain: Lubricate every 500 km and check slack.

If you are working on your bike immediately, keep these core factory specifications in mind: 0.87 Liters (Transmission) Spark Plug: NGK BR9ES or BR9ECM Idle Speed: 1,300 RPM ± 50 RPM Front Fork Oil: 235ml per leg (10W weight)

Replacement is suggested every 10,000–15,000 km, depending on riding style.

If you're unable to find a free service manual, you can consider purchasing one from:

If you're looking for DIY repair resources, you can try:

, noting their precise mechanical alignment.