PISTON KIT 08-11 YZF250 77 HC, WISECO 4976M07700 COMP. 14:1
4.1 Trustpilot 99.9% positive on eBay
Free UK delivery 2–4 business days
Spread the cost with 
18+, T&Cs apply
Wiseco 4976M07700 77.00mm 14:1 Compression 250cc Motorcycle Piston Kit. Race ready dome design for improved combustion flow. Armor glide skirt coating provides reduced friction. Piston kit includes piston, rings, wrist pin and circlips. Bore Size: 77.00mm.
- SKU
- 56-W4952.WI.HC
- Brand
- Wiseco
- Availability
- In Stock (2)
Fitments (9)
| Make | Model | Year |
|---|---|---|
| YAMAHA | YZ 250F | 2008 |
| YAMAHA | YZ 250F | 2009 |
| YAMAHA | YZ 250F | 2010 |
| YAMAHA | YZ 250F | 2011 |
| YAMAHA | YZF 250 | 2007 |
| YAMAHA | YZF 250 | 2008 |
| YAMAHA | YZF 250 | 2009 |
| YAMAHA | YZF 250 | 2010 |
| YAMAHA | YZF 250 | 2011 |
- General Product Group
- Engine
- General Product Type
- Pistons & Kits
- General Size
- 77mm
- Variant Id
- 256435
FULL DESCRIPTION
Wiseco High Compression Piston Kit - 77.00mm Bore, 14:1 Compression
This Wiseco high compression piston kit is designed for performance enthusiasts seeking maximum power from their motorcycle engine. Engineered with precision, this kit features a 77.00mm bore size and a 14:1 compression ratio, delivering a significant boost in performance.
Key Features:
- High Compression Ratio: 14:1 compression ratio for increased power output.
- Optimized Dome Design: Features a race-ready dome design engineered for improved combustion flow.
- Durable Construction: Built with a dedicated forging for exceptional lightweight strength.
- Friction Reduction: Includes ArmorGlide skirt coating for reduced friction in racing applications.
- Complete Kit: This piston kit includes the piston, rings, wrist pin, and circlips, providing everything needed for a comprehensive upgrade.
- Bore Size: Precisely machined to a 77.00mm bore size.
Upgrade your engine with this high-performance Wiseco piston kit for a noticeable improvement in speed and power.
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00.
Check the fitment table on this page against your make, model and year. Not sure? Call or email us and we will check it for you before you order.
UK delivery is £4.99, or free on orders over £60. Orders ship within 3 working days, then delivery takes 2–4 business days. Delivery details
Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy
By card, PayPal, Apple Pay or Google Pay, or spread the cost with Klarna. Payment is taken securely by Stripe, and the options for your order are shown at checkout.
More answers in our FAQ.
Trade pricing available
Buying parts for your business? Apply for a 2BrosParts trade account.