Motul RBF660 Racing Brake Fluid - 500ml

Motul RBF660 is a 100% synthetic racing brake fluid engineered for V-twin motorcycles, delivering one of the highest dry boiling points available at 617°F. Mixes safely with DOT 3 and DOT 4 systems but is not compatible with DOT 5 fluids.

Features

• 100% synthetic formulation
• Dry boiling point: 617°F
• Wet boiling point: 399°F
• Compatible with DOT 3 and DOT 4 systems
• 500ml bottle

Specifications

• Brand: Motul
• Manufacturer Part #: 101667
• UPC: 3374650020501
• Bottle Size: 500ml
• Weight: 3.31 lbs
• Dimensions: 3.31 in L × 2.2 in W × 2.2 in H

Fitment

Fits V-twin motorcycles using DOT 3 or DOT 4 brake systems.

Frequently Asked Questions

Can I mix RBF660 with my existing DOT 4 fluid?

Yes — RBF660 is fully compatible with DOT 3 and DOT 4 systems. Do not mix with DOT 5 (silicone) fluids.

What makes this racing-grade?

The 617°F dry boiling point resists fade under hard braking and track use, where stock fluid can boil.

How much fluid does one 500ml bottle cover?

One bottle typically fills or tops off a single motorcycle brake system depending on your bike's reservoir capacity.

Is this street-legal?

Yes — RBF660 meets racing standards and is street-legal for Harley-Davidson and Indian Motorcycle use.