Winderosa Branded Top End Gasket Kit for Yamaha YFM450 Grizzly (2007–2014) is designed as an aftermarket replacement quality rebuild solution. This kit restores proper sealing to the top end, helping maintain compression and engine reliability during maintenance or a cylinder refresh. Built to meet or exceed Yamaha's gasket tolerances, it provides a complete set of gaskets and seals to ensure a proper seal and long-lasting performance.

Comprehensive Vehicle Fitment

*Compatible with Yamaha YFM450 Grizzly 2007-2014. Always cross-reference with your service manual and OEM schematics to confirm exact fitment for your machine.*

Product Specifications

 

OEM & Aftermarket Cross-Reference Information

OEM and aftermarket cross-reference numbers are provided for reference purposes only. These part numbers are commonly referenced for Yamaha top-end gasket sets and may appear across multiple aftermarket suppliers. Always verify fitment using your machine's exact model, year, and original part number before ordering.

What's Included

Based on standard top-end gasket kits for the YFM450 engine, this Winderosa kit typically includes:

• Cylinder head gasket 

• Cylinder base gasket

• Valve cover gasket

• Exhaust gasket

• Intake gaskets

• Timing cover gaskets

• Related O-rings and seals as required for complete top-end sealing

Why Choose This Winderosa Top End Gasket Kit?

• Direct-Fit Compatibility: Precision-engineered for Yamaha YFM450 Grizzly models (2007–2014) across all variants including 4x4 Auto, EPS, IRS, and Hunter Editions .

• OEM Cross-Reference: Cross-references genuine Yamaha part numbers 5GH-11181-00-00  and 5GH-15451-00-00  for confident replacement.

• Proven Aftermarket Support: Multiple respected aftermarket brands manufacture compatible gasket kits:

  • Wiseco delivers OEM+ quality with gaskets inspected for quality and accuracy, ensuring reliable rebuild jobs 

  • Namura carefully develops gaskets from materials specifically chosen for each application, tested using ASTM standards to meet or exceed OE performance 

  • Athena brings over 40 years of experience with gaskets manufactured using latest generation lasers for high precision cutting, completely eliminating production burrs 

• Complete Top-End Coverage: Includes all essential gaskets for cylinder head, base, valve cover, exhaust, intake, and timing covers.

• Restores Compression: New head and base gaskets ensure proper cylinder sealing for optimal engine performance.

• Prevents Leaks: Complete sealing kit prevents oil seepage and maintains clean engine operation.

• Cost-Effective: Aftermarket replacement provides reliable quality at a practical price point.

Installation Notes:

• Ensure all mating surfaces are clean and free from old gasket material before installation.

• Follow manufacturer torque specifications and tightening sequences for cylinder head bolts.

• Use new gaskets only—do not reuse old gaskets once removed.

• Check valve clearance after head installation and adjust if necessary.

• Verify all components are properly seated before reassembling the top end.

• After installation, run the engine and check for any signs of leaks.

Why Upgrade?
Worn or damaged gaskets can cause compression loss, oil leaks, and contamination—leading to poor performance and potential engine damage. Restore your Yamaha YFM450 Grizzly engine's sealing integrity with this quality Winderosa aftermarket top end gasket set, designed to keep you riding with confidence.

Order your top end gasket kit today and get back on the trail with confidence.