Cylinder Works Big Bore Cylinder Kit 100mm 511cc - Honda CRF450R (2002-2008)
Cylinder Works Big Bore Cylinder Kit 100mm - Honda CRF450R
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.
What's Included
- Cylinder Works 100mm big bore cylinder
- Vertex matched piston
- Piston rings
- Wrist pin and clips
- Complete top end gasket kit
Key Features
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.
Specifications
- 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
Fitment
Honda CRF450R: 2002-2008
Pro Tip
Pair with Hot Rods stroker crankshaft (part# 0921-0040) to achieve 511cc displacement for maximum power gains.
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.
OEM Reference Numbers
12100MEB670, 12100MEN670, 12100MEN671
📦 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.
