Forks and chain

• Fork oil: SAE 10W to 20W. 430 cc in each leg.
• Oil level from the top of the tube: Not published for the RS125.
• Measure any published level with the spring out and the leg fully extended. That method is stated for the quantity check as well.
• Fork tube runout service limit: 0.2 mm.
• Chain: 520. Slack 25–35 mm. Lubricant: gear oil, or a spray chain lubricant.
• Rider sag and spring rate: Not published.

Brakes and wheels

• Fluid: DOT 5.1, listed as compatible with DOT 4. Read the cap as well.
• Pad friction material, minimum: 1.5 mm, front and rear.
• Front and rear disc thickness service limit: 4.5 mm. Maximum disc runout: 0.3 mm.
• The manual describes the front caliper as four opposed pistons and the rear caliper as two opposed pistons.
• Rear brake pedal pushrod clearance: 0.5–1.0 mm.
• Rim size: front 17 × 3.00, rear 17 × 4.00.
• Wheel runout, maximum: 2.0 mm axial and 2.0 mm radial. Axle runout, front and rear: 0.25 mm maximum.
• Wheel bearing numbers: Not published.

Tyres

Approved brands are on the swingarm label or in the owner's handbook, not in this table.

The 1999-on row is a list of sizes, not a rule for which size left the factory in which year.To verify against the swingarm label on the bike.

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