Cylinder Works 77mm Std 12.6:1 Cylinder Kit – KX250F 2004-2005 / RM-Z250 2004-2006
Cylinder Works Cylinder Kit 77.00mm (Std) 12.6:1 – KX250F / RM-Z250
Stock look, race performance. This Cylinder Works standard-bore (77.00 mm) 12.6:1 kit refreshes your 250F with a plated stock-appearance cylinder, a matched Vertex piston kit, and top-end gaskets for a clean, reliable rebuild.
✅ What’s Included
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Nickel–silicon-carbide plated 77.00 mm cylinder (OEM-style casting)
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Vertex piston kit (piston, rings, wrist pin, circlips)
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Top-end gasket kit
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Replacement pistons, rings, and gaskets available separately
📦 Fitment
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Kawasaki KX250F: 2004, 2005
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Suzuki RM-Z250: 2004, 2005, 2006
🔑 Key Features
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Standard bore with 12.6:1 compression for crisp throttle response
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Cylinder looks just like stock; direct bolt-on fit
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Nickel–silicon-carbide (Nikasil) plating for durability and heat transfer
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Matched Vertex components to reduce noise and extend service life
⚠️ Compliance
Designed exclusively for closed-course competition use only. Use on public lands or highways (including in California) is illegal.
🛡️ Warranty
New product with manufacturer’s limited warranty against defects.
💲 Price & SKU
Retail Price: $635.95
SKU: 422-30001K / 30001-K01
Estimated Shipping Weight: 2.94 lb
Package Dimensions: 11.00 × 8.80 × 6.50 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.
