Cylinder Works 80mm Big Bore Kit – KX250F 2004-2008 /RM-Z250 (269cc)
🛠️ Cylinder Works Big Bore Cylinder Kit 80.00mm (+3.0) 12.6:1 – KX250F / RM-Z250 (2004–2008)
Turn your 250F into a true holeshot hunter. This Cylinder Works 80.0mm big-bore kit bumps displacement to ≈269cc (from 249cc) with a high-compression 12.6:1 setup. Stock-look plated cylinder, a matched Vertex piston kit, and top-end gaskets deliver bolt-on power with OEM-style reliability—no machining required.
✅ What’s Included
-
80.00 mm nickel–silicon-carbide plated cylinder (stock-appearance casting)
-
Vertex piston kit (piston, rings, wrist pin, circlips) matched to the bore
-
Top-end gasket kit (valve stem seals not included)
📦 Fitment
Kawasaki KX250F — 2004, 2005, 2006, 2007, 2008
Suzuki RM-Z250 — 2004, 2005, 2006
🛡️ Warranty Info
All components are new and backed by the manufacturer’s limited warranty against defects in materials and workmanship.
🔑 Key Features
-
Big bore to ≈269cc for stronger mid-range and top-end pull
-
12.6:1 compression for crisp throttle response (pump premium recommended)
-
Nikasil (nickel–silicon-carbide) plating for durability and heat transfer
-
Matched Vertex piston reduces noise and enhances longevity
-
Cylinder looks just like stock; seamless OEM fit
-
No machine work needed; service parts (pistons, rings, gaskets) available
💲 Price & SKU
Retail Price: $731.95
SKU: 422-31001K / 31001-K01
Estimated Shipping Weight: 3.15 lb
Package Dimensions: 11.30 × 8.60 × 6.60 in
Handling: Ships next business day from U.S. warehouses.
📦 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.
