Manufacturer Part Number:
08-857
Cross-Reference OEM Part Numbers:
Yamaha: 5KM-2580V-01-00 (rear caliper assembly)
Yamaha: 5KM-2580V-00-00 (rear caliper assembly alternate)
Aftermarket Cross-References:
ProX: 37.63043
All Balls: 18-3042
Kit Contents:
• Caliper piston — stainless steel
• Pressure seal and dust boot
• Bleeder cap
• Brake pad retaining pins
• Copper crush washers
• Silicone grease
Position: Rear
Engine Specifications:
• Yamaha Grizzly 660: 660cc 4-Stroke SOHC Single Cylinder — Liquid Cooled
Notes:
• Rear brake caliper rebuild kit — NOT master cylinder
• Restores full rear braking performance
• Replace during brake pad change if piston shows corrosion or seals are leaking
Features:
• Direct OEM replacement — drop-in fit with no modifications required
• Stainless steel piston resists corrosion and pitting
• Premium seal compounds resist brake fluid degradation and heat
• Restores full braking power and eliminates dragging or sticking
When to Rebuild:
• Brake caliper dragging or sticking — uneven pad wear
• Visible brake fluid leakage at caliper body
• Piston seized or difficult to retract during pad replacement
• Pitted or corroded caliper piston
• Preventive maintenance during brake pad replacement
Installation Notes:
• Clean caliper bore thoroughly — remove all old seal material and corrosion
• Lubricate new seals with silicone grease before installation
• Do not use petroleum-based lubricants — they destroy rubber seals
• Bleed brake system after installation
• Torque banjo bolt to manufacturer specification
PRODUCT NOTICE:
As a parts distributor we mostly sell aftermarket parts (any OEM parts would be noted as such). Aftermarket parts are not sourced from the original vehicle or equipment manufacturer, but are designed to function the same as - if not better than - the original. All parts sold are new.
WARNING - This product may expose you to chemicals which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov
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