PROX Brake Disc for YAMAHA YZ 80, YZ 85 1993-2026

The PROX 37.BD12193 brake disc is designed for YAMAHA YZ 80, YZ 85 from 1993 to 2026. The disc, bolted to the hub, is the surface the pads clamp onto. It has to stay flat and thick enough to get rid of the heat: a tired disc lengthens stopping distances and wears the pads.

Specifications

• Brand: PROX
• Manufacturer part number: 37.BD12193

When to replace it?

• Thickness below the minimum stamped on the disc or given in the manual.
• Warped disc: vibration through the lever or pedal, brake that “pulses”.
• Deep scoring, cracks or blueing after overheating.

Measure the thickness with a micrometer every time you change the pads, and replace the disc as soon as it reaches the minimum thickness, or if it's warped or cracked.

Fitting tips

1. Clean the hub mounting face: a single grain of sand under the disc is enough to throw it out of true.
2. Fit the disc the right way round (markings facing out, direction of rotation if indicated).
3. Tighten the bolts in a criss-cross pattern to the manufacturer's torque, with medium-strength threadlocker.
4. Degrease the disc and ideally fit new pads.
5. Bed in with a dozen progressive stops.

Why PROX?

Founded in 1975 and based near Amsterdam, ProX specialises in engine and clutch wear parts for off-road bikes. The brand has most of its range made in Japan, by OEM suppliers, for quality on a par with the original parts.

Spare parts and items to plan

• Brake pads : BREMBO · TECNIUM
• Brake fluid : MOTUL 1 L · LIQUI MOLY 500 ml

Frequently asked questions

Should the pads be changed along with the disc?
It's strongly recommended: worn pads have taken on the shape of the old disc and won't brake well on a new one.

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
YAMAHA YZ 80 2019
YAMAHA YZ 80 2018
YAMAHA YZ 80 2017
YAMAHA YZ 80 2010
YAMAHA YZ 80 2009
YAMAHA YZ 80 2008
YAMAHA YZ 80 2007
YAMAHA YZ 80 2006
YAMAHA YZ 80 2005
YAMAHA YZ 80 2004
YAMAHA YZ 80 2003
YAMAHA YZ 80 2002
YAMAHA YZ 80 2001
YAMAHA YZ 80 2000
YAMAHA YZ 80 1999
YAMAHA YZ 80 1998
YAMAHA YZ 80 1997
YAMAHA YZ 80 1996
YAMAHA YZ 80 1995
YAMAHA YZ 80 1994
YAMAHA YZ 80 1993
YAMAHA YZ 85 2026
YAMAHA YZ 85 2025
YAMAHA YZ 85 2024
YAMAHA YZ 85 2023
YAMAHA YZ 85 2022
YAMAHA YZ 85 2021
YAMAHA YZ 85 2020
YAMAHA YZ 85 2019
YAMAHA YZ 85 2018
YAMAHA YZ 85 2017
YAMAHA YZ 85 2016
YAMAHA YZ 85 2015
YAMAHA YZ 85 2014
YAMAHA YZ 85 2013
YAMAHA YZ 85 2012
YAMAHA YZ 85 2011
YAMAHA YZ 85 2010
YAMAHA YZ 85 2009
YAMAHA YZ 85 2008
YAMAHA YZ 85 2007
YAMAHA YZ 85 2006
YAMAHA YZ 85 2005
YAMAHA YZ 85 2004
YAMAHA YZ 85 2003
YAMAHA YZ 85 2002
YAMAHA YZ 85 2001
YAMAHA YZ 85 2000
YAMAHA YZ 85 1999
YAMAHA YZ 85 1998
YAMAHA YZ 85 1997
YAMAHA YZ 85 1996
YAMAHA YZ 85 1995