Yamaha 2X5-11637-00-00, 2X5-11637-00 Piston

Description:

The Yamaha 2X5-11637-00-00 piston is used in two-stroke motorcycle engine systems. Commonly installed in Yamaha YZ400 engines and similar vintage motocross machines requiring oversize piston replacement. Maintenance teams, engine rebuilders, and motorcycle technicians use this part for engine repair, compression restoration, and performance rebuilding.

Applications:

The Yamaha 2X5-11637-00-00 is used in motorcycle engine systems to replace worn or damaged pistons, restoring proper combustion, compression, and engine efficiency. It is widely applied in vintage motocross bikes, restoration projects, and high-performance two-stroke engines where reliable engine operation and power output are critical.

Technical Specifications:

• Compatible with Yamaha YZ400 (1979 models and similar configurations)
• Product type: Piston (3rd oversize)
• Oversize: +0.75 mm (3rd oversize configuration)
• Function: Converts combustion energy into mechanical motion
• Engine type: Two-stroke gasoline engine
• Material: Aluminum alloy piston construction
• Application: Engine rebuild and repair
• Fitment: Requires matched cylinder bore for oversize piston
• Condition: OEM part, often discontinued or limited availability
• Origin: Genuine Yamaha component (Japan)

Common Replacements:

• Yamaha 2X5-11635-00-00
• Yamaha 2X5-11636-00-00
• Yamaha 2X5-11638-00-00