Yamaha Rhino Grizzly 660 Cylinder Head Assembly YXR660 YFM660 Valves Springs

📖 Product Description

Upgrade or replace your worn top end with this brand new aftermarket cylinder head assembly designed for the Yamaha Rhino 660 and Grizzly 660 platforms. This fully assembled head comes complete with valves, valve springs, retainers, seats, keepers, and seals, providing a ready-to-install solution for engine rebuilds and performance restoration.

Engineered for durability and reliability, this complete cylinder head assembly restores compression, improves airflow, and helps bring your engine back to peak performance. Ideal for rebuilds, repairs, or replacing damaged OEM heads, this unit is designed to work with both new and existing valve covers (machining required for proper fitment).

🔥 Key Features & Benefits

• Fully assembled cylinder head for faster installation and reduced downtime
• Includes complete valve train components – valves, springs, retainers, keepers, seals, and seats
• Restores engine compression and performance for worn or damaged engines
• Direct replacement for Yamaha OEM part # 5KM-11101-01-00
• Compatible with new or used valve covers (machining required)
• Ideal for rebuilds and performance maintenance on 660 Yamaha engines

📦 Product Contents

• Complete cylinder head casting
• Intake and exhaust valves
• Valve springs
• Valve retainers
• Valve keepers (locks)
• Valve seats
• Valve stem seals

✅ Compatibility

• Yamaha Grizzly 660 4x4 (2002–2008)
• Yamaha Rhino 660 (2004–2007)
• Replaces OEM Part #: 5KM-11101-01-00
• Not compatible with Yamaha Raptor 660

Important Fitment Note: The cylinder head and valve cover must be machined to match each other to ensure proper sealing and performance. This is a standard process and can be completed by any qualified local machine shop.

❓ FAQ

• Q: Is this cylinder head fully assembled?

  A: Yes, it comes fully assembled with valves, springs, retainers, keepers, seats, and seals installed.

• Q: Does this include the valve cover?

  A: No, the valve cover is not included. It is designed to work with your existing or new cover.

• Q: Is machining required?

  A: Yes, the head and valve cover must be machined to match each other for proper sealing and fitment.

• Q: Will this fit a Yamaha Raptor 660?

  A: No, this cylinder head is not compatible with the Yamaha Raptor 660.

🌟 Why Buy from BPRATV

At BPRATV, our promise is unwavering: The Best Parts. The Best Performance. The Best Price. We specialize in high-performance powersports components trusted by riders and builders who demand reliability and results. Every part is carefully selected for precision, durability, and real-world performance. Trust BPRATV to keep your Yamaha Rhino and Grizzly 660 ATV/UTV running at its best, every single time.

Restore your Yamaha 660 engine performance with this complete cylinder head assembly—order today!

BPRATV - The Best Parts. The Best Performance. The Best Price.

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© BPRATV LLC

Due to the nature of high performance and racing applications, BPRATV LLC components are sold without express warranty or any implied warranty of merchantability or fitness for a specific purpose. BPRATV LLC shall not, under any circumstances, be liable for any specific, incidental or consequential damages, including, but not limited to, damage, or loss of property or equipment, loss of profits or revenue(s), cost of purchased or replacement goods, or claims of customers of the purpose, which may arise and/or shall result from sale, installation or use of these parts. Installation of these parts may void vehicle manufacturers warranty coverage and/or may cause the vehicle to be illegal in some locations.

This product is exempt from the emission standards and related requirements of 40 C.F.R. §1051 as provided by 40 C.F.R. §1051.620, and California law. This product is sold only for use in connection with EPA-certified, purpose-built, nonroad vehicles used solely for closed-course, nonroad competition/racing.