Cylinder Works Big Bore Cylinder Kit 100mm 511cc - Honda CRF450R (2002-2008)
- Ships next business day
- 30-day hassle-free returns
- Call us: 541-668-7503
- Secure checkout — Pay in 4 available
Complete big bore cylinder kit takes your CRF450R from 450cc to 488cc, or 511cc when paired with Hot Rods stroker crankshaft (0921-0040). Includes Vertex piston, Nikasil plated cylinder, and full gasket kit. Made in the USA.
✓ Fits:
- Honda CRF450R: 2002-2008
✓ Features:
- 12100MEB670, 12100MEN670, 12100MEN671
- Nikasil plated cylinder for long life and excellent heat transfer
- Vertex piston ensures longevity and reduced engine noise
- No machine work required
- Looks virtually identical to OEM
- Direct bolt-on installation
✓ What's Included:
- Cylinder Works 100mm big bore cylinder
- Vertex matched piston
- Piston rings
- Wrist pin and clips
- Complete top end gasket kit
✓ Specs:
- Bore Size: 100mm (+4mm overbore)
- Displacement: 488cc (511cc with stroker crank)
- Compression Ratio: 12.1:1
- Engine Type: 4-Stroke
- Material: Aluminum / Cast with Nikasil plating
- Weight: 3.95 lbs
Note: Pair with Hot Rods stroker crankshaft (part# 0921-0040) to achieve 511cc displacement for maximum power gains.
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.
