ATHENA R4856-267 Race Gasket Kit for Yamaha 250 YZ 1999-2018

Breathe new life into your race engine with Athena's Race Gasket Kit. Designed for racers and engine builders, this premium gasket kit provides the flexibility to precisely adjust cylinder height for optimized squish clearance, compression ratio, and valve timing. Manufactured with advanced sealing materials and backed by over 40 years of Athena engineering, these gaskets deliver exceptional durability, heat resistance, and leak-free performance under the extreme demands of motocross and enduro competition.

• Race-spec gasket kit designed for precision engine tuning and performance builds
• Includes multiple cylinder base gasket thicknesses for accurate squish and compression adjustment
• Premium gasket materials resist heat, oil, fuel, and extreme cylinder pressures
• Precision-manufactured to meet or exceed OEM sealing specifications
• Advanced sealing treatments help prevent leaks in critical engine areas
• No additional silicone sealants required for proper installation

Includes:

• Cylinder Head Gasket
• OEM Thickness Cylinder Base Gasket
• 0.10mm Thinner Cylinder Base Gasket

• Designed for high-performance 2-stroke motocross engines
• Allows adjustment of squish clearance, compression ratio, and valve timing
• Manufactured using premium gasket materials, including Athena's proprietary Motorgasket® technology where applicable
• Engineered for maximum sealing under extreme mechanical and thermal loads

The ATHENA R4856-267 Race Gasket Kit is designed for Yamaha 250 YZ models from 1999 through 2018. This kit provides gasket components for race-oriented engine service and is identified by part number R4856-267.

Manufactured under the ATHENA brand, the kit is supplied as one unit. Its listed product weight is 2.4 pounds, making it a practical replacement component for maintenance or rebuild work where the specified Yamaha 250 YZ application applies.

Verify the vehicle year and model against the stated 1999-2018 Yamaha 250 YZ application before ordering. The supplier identifies this product by the description “Race Gasket Kit” and unit of measure EA.

Features:

• Brand: ATHENA
• Part Number: R4856-267
• Product Type: Race gasket kit
• Application: Yamaha 250 YZ, model years 1999-2018
• Unit of Measure: Each
• Product Weight: 2.4 pounds