1999-2025 Yamaha YZ250 Cylinder Works STD Bore 66.40mm Top End Rebuilt Kit 20009

Introduction

20009, 804M06640, 5CU-11631-00-A0, 5CU-11311-02-00, BR8ES, C3592,C7855,810670,P400485600267,8216DA,01.2321.B,01.2321.C

Get your dirt bike firing on all cylinders with the Yamaha YZ250 YZ 250 Top End Rebuild Kit. This complete top end overhaul breathes new life into your 2-stroke with upgraded performance parts ready to rip up the track.

Cylinder, Piston, Gaskets, Spark Plug

Fits Yamaha YZ250

1999-2025

• New Stock Bore 66.4mmNikasil-plated cylinder maintains compression and cooling (1 Year Warranty)
• Forged Wiseco piston increases horsepower (Includes Rings, Wristpin, & Circlips)
• Wiseco or Shindy Top End Wrist Pin Bearing (Both are Made in Japan)
• Cometic, Athena, or Vertexgasket kit ensures a reliable, leak-free seal
• NGK Spark Plug to make sure it fires right up

Give your YZ250 a new lease on life. This top-shelf rebuild kit includes a OEM-spec Nikasil-plated cylinder, Wiseco forged piston, rings, wristpin, circlips, and top endgaskets – everything you need for a complete top end rebuild. Factory-fresh power and performance is just a wrench turn away.

Rebuilding the top end restores compression and horsepower to keep your YZ250 ripping laps. This kit is made for the weekend warrior who wants their trusty steed to keep charging year after year. Breathe new life into your 2-stroke and save big over buying brand new OEM parts.

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5CU-11631-00-A0, 5CU-11631-00-B0, 5CU-11631-00-C0, 5CU-11631-00-D0, 5CU-11603-10-00, 5CU-11603-00-00, 5CU-11633-10-00, 5CU-11633-00-00, 93450-19052-00, 5CU-11311-02-00, 5CU-11311-00-00, 5CU-11351-10-00, 5CU-11351-00-00, 93211-02703-00, 93210-74316-00, 93210-15639-00