Cylinder Works Big Bore Cylinder Kit 99mm 480cc - Honda CRF450R / CRF450RX (2017-2018)
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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.
✓ Fits:
- Honda CRF450R: 2017-2018
- Honda CRF450RX: 2017-2018
✓ 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
- Cylinder Works is a trusted name in powersports engine components
✓ What's Included:
- Cylinder Works 99mm big bore cylinder
- Vertex matched piston
- Piston rings
- Wrist pin and clips
- Complete top end gasket kit
✓ Specs:
- 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
Ships fast from DuneGoonShop!
📦 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.
