Independent workshop record · Not affiliated with Aprilia or Piaggio

Suspension, brakes and tyres

  • Tyre sizes change in 1999. Read the swingarm label.
  • Workshop pad minimum is 1.5 mm. The MOT line is different.
  • Sag and spring rates are not published.

One idea at a time in focus mode

Suspension, brakes and tyres

The chassis figures that are already in the manual, and the upgrades left open.

Before you start

Suspension, brakes and tyres

  • Tyre sizes change in 1999. Read the swingarm label.
  • Workshop pad minimum is 1.5 mm. The MOT line is different.
  • Sag and spring rates are not published.

Your own risk. Wrong jetting or timing can seize the engine. This is information, not advice.

How many steps: 2

Tyres and pads that are already specified Verified

Haynes, 1993–1998: front 110/70-17, rear 150/60-17. From 1999 the manual lists more than one approved size, including a 100/80-17 or 110/70-17 front and a 130/70-17, 140/60-17 or 150/60-17 rear. The approved brand is the one on the swingarm label.

Friction material, workshop minimum: 1.5 mm. DVSA: a lining worn below 1.0 mm is a dangerous defect. The 1.5 mm figure is the stricter service figure. Neither number is an upgrade.

A tyre size that is not on the swingarm label, or a compound with no approval mark, is To verify against that label and the current MOT manual before anyone calls it legal.

Source: Haynes manual 4298, and the DVSA motorcycle brake manual

Forks, shock, sag To verify

Fork oil quantity is 430 cc a leg, SAE 10W to 20W, measured with the spring out and the leg extended. An RS125 oil level is not published. Rider sag and spring rates are To verify.

No sourced aftermarket shock, fork cartridge or brake upgrade was adopted for 1993–2006. A listing with the year and the part number would close that. The 2006 bike’s brake description, radial in the model notes and four opposed pistons in Haynes, stays on the chassis spec page as the existing conflict.

Source: Haynes manual 4298. Upgrade parts: none adopted.

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