Wiseco High-Performance Forged Piston Kit with Gaskets - Yamaha YZ250F (2008-2011) - 77.00mm Bore - 14.0:1 HIGH COMPRESSION
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Wiseco High-Performance Forged Piston Kit with Gaskets - Yamaha YZ250F (2008-2011) - High Compression
Premium Wiseco forged piston kit with complete top-end gasket set for the 2008-2011 Yamaha YZ250F. This is the HIGH COMPRESSION version with 14.0:1 compression for maximum power! Features ArmorGlide® skirt coating for reduced friction and extended life.
⚠️ Important: Nikasil Cylinder
This piston kit fits Nikasil bore cylinders only. Verify your cylinder type before ordering.
⚡ High Compression: 14.0:1
This is a high compression piston (14.0:1) designed for riders who want maximum power. Requires premium fuel.
Kit Includes
- Wiseco Forged Piston (#4976M07700) - Premium 2618 aluminum alloy with ArmorGlide®
- Ring Set (#7700YC)
- Wrist Pin (#S742)
- Wrist Pin Retainer Set (#CW16)
- Top End Gasket Kit (#W5921)
Piston Specifications
- Bore Size: 77.00 mm (Standard)
- Piston Diameter: 76.95 mm
- Stroke Length: 53.60 mm
- Compression Ratio: 14.0:1 (HIGH COMPRESSION)
- Material: 2618 Aluminum Alloy
- Skirt Coating: ArmorGlide®
Fitment
- Yamaha YZ250F: 2008-2011
Standard vs High Compression
This is the HIGH COMPRESSION (14.0:1) kit. For stock compression, check out our standard kit (13.5:1, SKU 0903-0937).
📦 Shipping Information
In-stock items ship next business day. ModQuad parts dispatch Monday through Thursday.
Made-to-order and custom powder coat items show their lead time at the top of this page, right next to the truck icon. These are built fresh for you, so timing varies by brand and current backlog.
Need something by a specific date? Call us at 541-668-7503 before ordering and we will check stock and ETA on that exact part. We can often point you to an in-stock alternative from another distributor.
Questions? Contact us, we respond within 24 hours.
