PROX Rear Brake Caliper Rebuild Kit for YAMAHA YFM 660 2002-2008

On YAMAHA YFM 660 from 2002 to 2008, the PROX 37.63043 brake caliper rebuild kit fits in place of the original part. This kit rebuilds the brake caliper: pistons and seals, depending on the part number. Hardened seals or pitted pistons make the pads stick and the brake overheat; replacing them gives you clean, consistent braking again.

Specifications

• Brand: PROX
• Manufacturer part number: 37.63043

When to replace it?

• Brake that stays on or runs hot: the pistons don't retract properly.
• Fluid leaking at the caliper.
• Pistons pitted, scored or corroded.

Rebuild the caliper as soon as a piston sticks or leaks, and as preventive maintenance on a bike that often rides through water and mud.

Fitting tips

1. Drain the system, remove the caliper and push the pistons out with compressed air at low pressure, keeping your fingers out of the way.
2. Clean the seal grooves without scratching them, then fit the new seals lubricated with fresh brake fluid.
3. Push the pistons back in by hand, nice and straight, then refit the pads.
4. Fill and bleed the system with fresh fluid, then check that the lever or pedal is firm.

Why PROX?

ProX Racing Parts has been supplying engine and clutch parts to motocross riders since 1975, from its headquarters near Amsterdam. According to its catalogue, most of its parts are made in Japan, by manufacturers that also produce parts for the Japanese motorcycle makers.

Spare parts and items to plan

• Brake fluid : MOTUL 5 L · MOTUL 500 ml
• Brake pads : TECNIUM

Frequently asked questions

Which fluid should I use?
The one shown on the master cylinder cap, usually DOT 4: never mix it with mineral fluid.

Compatibility

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

Fits:
YAMAHA YFM 660 2008
YAMAHA YFM 660 2007
YAMAHA YFM 660 2006
YAMAHA YFM 660 2005
YAMAHA YFM 660 2004
YAMAHA YFM 660 2003
YAMAHA YFM 660 2002