Cylinder Works Big Bore Cylinder Kit 99mm 480cc - Honda CRF450R / CRF450RX (2017-2018)
Cylinder Works Big Bore Cylinder Kit 99mm - Honda CRF450R / CRF450RX
Take your CRF450R or CRF450RX from 450cc to 480cc with this complete big bore cylinder kit. The +3mm overbore delivers noticeable power gains throughout the RPM range. Includes Vertex matched piston, Nikasil plated cylinder, and full gasket kit. Direct bolt-on with no machine work required. Made in the USA.
What's Included
- Cylinder Works 99mm big bore cylinder
- Vertex matched piston
- Piston rings
- Wrist pin and clips
- Complete top end gasket kit
Key Features
Big bore design increases displacement from 450cc to 480cc. Nikasil plated cylinder for long life and excellent heat transfer. Vertex piston ensures longevity and reduced engine noise. Looks virtually identical to OEM. Direct bolt-on installation with no machine work required.
Specifications
- Bore Size: 99mm (+3mm overbore)
- Displacement: 480cc
- Compression Ratio: 13.5:1
- Engine Type: 4-Stroke
- Material: Cast Aluminum with Nikasil plating
- Weight: 4.25 lbs
Fitment
Honda CRF450R: 2017-2018
Honda CRF450RX: 2017-2018
Why Cylinder Works?
Cylinder Works is a trusted name in powersports engine components. Their cylinders and kits are manufactured in the USA to strict tolerances. Used by professional racers and weekend riders who demand reliability.
📦 Shipping Information
In-Stock Items:
- Most parts ship next business day
- Modquad parts: Monday–Thursday dispatch
Made-to-Order Items:
- Custom swingarms & A-arms: 2–4 weeks
- EVP exhaust systems: 2–4 weeks
- Sneakers: 1–2 weeks
Stock Guarantee: Items marked "In Stock" ship immediately. Made-to-order items are built fresh for you.
Questions? Contact us—we respond within 24 hours.
