YFZ-R1 High Comp Forged Piston Kit 09-14 - 77.97mm – K8812DB-4
4.4 Trustpilot 99.9% positive on eBay
Free UK delivery 2–4 business days
Spread the cost with 
18+, T&Cs apply
- SKU
- WOSS_K8812DB-4
- Brand
- Wossner
- Availability
- In Stock (1)
- Bore Size
- 77.97mm
- Clip Part Number
- CW17
- Compression Height
- 22.8mm
- Kit Part Number
- K8812
Show more +14Show less
- Oem Comp Ratio
- 12.3:1
- Original Sku
- K8812DB-4
- Over Size
- 0.01mm
- Pin Part Number
- WP111-SP
- Pin Size
- 17mm
- Piston Number
- 77.97mm – K8812DB-4
- Piston Size
- 77.97mm
- Product Type
- Forged Piston Kit
- Ring Part Number
- RIK78.00
- Stroke
- 52.2mm
- Vehicle Make
- Yamaha
- Wossner Comp Ratio
- 13.5:1
- Yom From
- 2009
- Yom To
- 2014
FULL DESCRIPTION
Pro Series High Compression Forged Piston Kit, 77.97mm Bore
A Pro Series high compression forged piston kit for street bikes with a 77.97mm bore, 0.01mm oversize, a 13.5:1 compression ratio and a 17mm pin.
Key Features
- Pro Series forged piston
- Slipper style design
- Riken rings
- Gas porting
- Three ring design
- High compression
Specifications
- Bore size: 77.97mm
- Piston size: 77.97mm
- Oversize: 0.01mm
- Compression height: 22.8mm
- Pin size: 17mm
- Stroke: 52.2mm
- Compression ratio: 13.5:1
- Ring part number: RIK78.00
- Pin part number: WP111-SP
- Clip part number: CW17
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00.
Call or email us with your make, model and year 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.
RELATED PARTS
Trade pricing available
Buying parts for your business? Apply for a 2BrosParts trade account.