Vertex Engine Rebuild Kit WR101-211 — Yamaha Grizzly 660 / Rhino 660 2002-2008

Product Description

Get your Yamaha 660 back on the trail with the Vertex WR101-211 Engine Rebuild Kit. This comprehensive kit is designed specifically for engines that have undergone cylinder boring, featuring a +0.5 mm oversized piston to restore factory tolerances and performance. By bundling the crankshaft, piston, gaskets, and bearings into one convenient package, Vertex ensures you have everything required for a professional-grade bottom-end and top-end engine overhaul.

Built to meet or exceed OEM specifications, this kit provides the reliability required for high-hour UTV and ATV engines. In addition to the performance-matched piston and crankshaft, the kit includes a complete engine gasket set with high-quality oil seals, main bearings, a water pump rebuild kit, and transmission components. Whether you are correcting engine wear or rebuilding after a failure, this Vertex kit offers the precision and durability needed for consistent power delivery and long engine life.

Top Features: Vertex Engine Rebuild Kit

• Oversized Performance: Includes +0.5 mm piston ideal for bored cylinders
• Complete Engine Internals: Features high-durability crankshaft and piston kit
• Total Seal Solution: Full engine gasket set with all necessary oil seals
• Comprehensive Bearing Kit: Includes main, transmission, and counter balancer bearings
• Full Overhaul Package: Includes water pump rebuild kit, cam chain, and seals

Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: Why does this kit include a +0.5 mm piston?
A: This kit is intended for engines where the cylinder has been bored 0.5 mm over the stock diameter to remove scratches, scuffs, or taper, ensuring a perfect ring seal and restoring compression.

Q: Do I need a professional to install this kit?
A: While experienced enthusiasts can manage an engine rebuild, this involves critical bottom-end and transmission work. We recommend having your cylinder precision-bored by a machine shop to match the +0.5 mm piston clearance perfectly.

Expert Pro-Tip: Before installing your new crankshaft and bearings, double-check your oil pump's condition. A common cause of engine failure in these 660s is oil starvation; installing a fresh rebuild kit with a faulty or worn oil pump will lead to premature failure of your new components.

Recommended Pairings:
o Yamaha 4-Stroke Performance Parts
o All Quads/ATV Performance Parts
o High-Quality Engine Break-In Oils

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