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Brake Caliper Piston Kit — Yamaha YZ125

Part # 18-9046
Item #138826
Fits 3 motorcycles
  • Yamaha
    • YZ125 · 1985–1988 (front)
    • YZ250 · 1985–1988 (front)
    • YZ490 · 1985–1990 (front)

⚠ Brake parts are caliper-specific. The same model can use different calipers by trim or year (base vs SP, ABS, Brembo vs stock), and catalog data isn't always exact. Confirm this fits your bike's actual caliper before ordering.

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All Balls Racing Brake Caliper Piston Kit — Yamaha YZ125 (1985-1988) + 2 more
Product Details

Caliper pistons stuck, sticky lever feel, or a creeping low fluid level with no visible leak — the rubber seals inside the caliper or master cylinder are toast. All Balls rebuild kits include every rubber part you need to make ONE caliper or master cylinder new again: piston seals, dust boots, bleeder caps, pad pins, copper crush washers. OEM-spec EPDM rubber, bike-specific fitment.

Kit fits the bikes listed below. Confirm whether you need front or rear (some bikes share a kit, most don't).

Fits:

  • Yamaha YZ125 (1985-1988)
  • Yamaha YZ250 (1985-1988)
  • Yamaha YZ490 (1985-1990)

Kit contents:

  • 2x Caliper Piston

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