Cylinder Works 860cc Big Bore Cylinder Kit
Cylinder Works 860cc Big Bore Cylinder Kit
Hurry up, only 1 item left in stock.
About this product
About this product
Upgrade your engine's performance with the Cylinder Works 860cc Big Bore Cylinder Kit. This kit provides a significant power boost while maintaining reliability and longevity. Designed for enthusiasts and professionals alike, this kit offers increased displacement and improved engine efficiency.
Description
The Cylinder Works Big Bore Cylinder Kit delivers a substantial increase in power and torque, transforming your engine's capabilities. The kit includes Vertex pistons, engineered to match the cylinder for optimal performance and reduced engine noise. Featuring a nickel silicon carbide cylinder sleeve, this kit ensures durability and efficient heat dissipation. The cylinder's design closely replicates OEM specifications, ensuring a seamless fit and factory-like appearance. This kit enhances your engine's overall performance, providing a noticeable improvement in acceleration and power delivery. Made in the USA, this kit reflects superior craftsmanship and quality. Installation is straightforward, with no machining required in most applications, simplifying the upgrade process.
Features & highlights
- Increases engine displacement to 860cc for enhanced power and torque.
- Includes matched Vertex pistons for optimal performance and longevity.
- Nickel silicon carbide cylinder sleeve ensures durability and efficient heat transfer.
- Designed to closely resemble OEM cylinders for a seamless fit and factory look.
- Made in the USA, guaranteeing high-quality materials and construction.
- No machining required for installation in most cases, simplifying the upgrade process.
- Kit includes all necessary components: cylinder, piston, rings, pin, clips, and gaskets.
Technical specifications
- Brand: Cylinder Works
- Part Number: 09310613 (Vendor Part Number: 31007-K02)
- Color/Finish: Gray
- Displacement: 860cc
- Cylinder Diameter: 91.00 mm
- Overbore: +6.00 mm
- Compression Ratio: 9.2:1
- Engine Type: 4-Cycle
- Material: Aluminum, Cast
- Units: Kit
Important to know
Cylinder does not require machine work (unless noted).
Shipping & Return
Shipping & Return
Free shipping to GLS parcel shop parcel box for purchases over DKK 1,000.
GLS home delivery costs DKK 59.
We do our best to ship your order as quickly as possible. All orders are generally packed within 24 hours on weekdays.
There is a 14-day return policy. Read more
Parts Denmark Info
Parts Denmark Info
Parts Denmark is a new webshop based in Denmark. We have a physical location you can visit (No showroom yet), and we have both email and phone support in our opening hours.
Our company info is:
Parts Denmark ApS
VAT: DK45974758
Dam Holme 11
3660 Stenløse, Denmark
hello@partsdenmark.com
+45 222 333 29
Best regards,
William Svendsen & Martin Høyer (Owners)
Specifications
CYLINDER WORKS
31007-K02
Cylinder Kit
9.2:1
860 cc
91.00 mm
+6.00 mm
4-Cycle
Aluminum, Cast
Kit
Reviews


Who is behind Parts Denmark
Martin and William are the duo behind Parts Denmark — an unlikely but awesome combo of a tech-savvy young IT wizard and a seasoned motorcycle guru who’s seen (and fixed) it all. Together, we’ve built a team with big ambitions, plenty of passion, and a shared mission to create great things — side-by-side with you.
Based in Denmark
Fast customer support
Over 100.000 Products
2-Year Full Warranty
Your peace of mind is our priority. Every product in our shop comes with a comprehensive 2-year warranty, so you can hit the road with full confidence.
Support in Danish, Swedish, German & English
Whether you are upgrading your exhaust or choosing a new helmet, our team of seasoned riders is ready to provide professional guidance for your specific bike.
Free Shipping Over 200€ (EU)
Shop your favorite gear without worrying about extra costs. We offer free shipping on all orders over 200€ (EU), ensuring your parts reach you safely and affordably.
Authorized Parts Europe Dealer
As a certified Parts Europe supplier, we guarantee 100% authentic, high-quality motorcycle parts and accessories directly from the world's leading manufacturers.

