Brake pads are a wear item — check them every service and replace before they hit the wear indicators. On the Kawasaki Ninja 400, a front pad swap is a straightforward 30-minute job with basic tools.
Use pads matching the OEM compound type, and have fresh DOT 4 brake fluid on hand to top up the reservoir after pushing the pistons back.
Kawasaki Ninja 400 quick service specs
| Item | Specification |
|---|---|
| Engine oil | 10W-40 |
| Oil capacity | 2.0 liters |
| Oil change interval | 3800 miles |
| Chain slack | 20-30 mm |
| Spark plug | NGK LMAR9G |
| Tire pressure (F/R) | 28 PSI front / 32 PSI rear |
| Battery | 12V 8Ah (FTX9-BS, sealed) |
How to replace the front brake pads, step by step
- Support the bike upright. Remove the caliper mounting bolts and slide the caliper off the disc — don’t let it hang by the brake hose.
- Note the position of pad pins, clips, and shims, then remove the old pads.
- Push the caliper pistons back into their bores evenly. Watch the master-cylinder reservoir — remove excess fluid so it doesn’t overflow.
- Clean the caliper, pins, and pad contact points. Lightly grease sliding pins with brake-specific grease (never on pad or disc surfaces).
- Fit the new pads with all shims and clips in their original positions.
- Remount the caliper, torque bolts to spec, and pump the lever until it’s firm before riding.
- Bed the pads in with 10-15 moderate stops from 30-40 mph, allowing cooling between stops. Avoid hard braking for the first 100 miles.
Common mistakes to avoid
- Getting grease or fluid on the pads/disc — contamination ruins braking and usually means new pads.
- Forgetting to pump the lever — the first pull will go to the bar. Always pump before moving the bike.
- Skipping the bed-in — unbedded pads stop poorly and can glaze.
FAQ
How do I know the Kawasaki Ninja 400 pads need replacing?
Check the friction material against the wear grooves or indicators — replace when nearly flush, or if braking feels weak or noisy.
Sintered or organic pads?
Sintered last longer and bite harder, especially in wet; organic are gentler on discs and quieter. Match your riding.
Should I change brake fluid too?
Fluid absorbs moisture over time — flush with fresh DOT 4 every 2 years regardless of mileage.
Related guides
Dan Heiman
Writer at Helmet Today, covering helmet reviews, fit and riding safety.
