Cylinder Works 31001-K01 Big Bore 80.00 mm Cylinder Kit 2004-2006 Suzuki RM-Z250

Stop settling for the limitations of a tired stock top end. The Cylinder Works 31001-K01 Big Bore Cylinder Kit is the definitive solution for riders looking to breathe new life into their 2004-2006 Suzuki RM-Z250. Designed for Racing Performance, this kit provides a significant increase in displacement, delivering the immediate throttle response and low-end grunt needed to clear triples and pull holeshots. When you source your performance parts from Moto-House MX, you’re getting race-proven hardware backed by enthusiasts who live for the track.

Engineered for maximum longevity, this kit features a high-grade cylinder plated with Nickel Silicon Carbide (NSC). This specialized plating is incredibly hard and wear-resistant, ensuring your engine maintains peak compression even under extreme heat and high-RPM racing conditions. Paired with a precision-forged Vertex piston, this setup reduces internal friction and engine noise while significantly extending service intervals compared to inferior cast alternatives. Best of all, this is a true bolt-on upgrade—no expensive machining or case splitting required.

Top Features: Cylinder Works Big Bore Cylinder Kit

• Big Bore Displacement: Engineered to increase total CCs for a massive boost in horsepower and torque across the entire powerband.  (80.00 mm)
• Vertex Forged Piston: Includes a premium, high-compression Vertex piston kit matched specifically to the cylinder for optimal skirt-to-wall clearance.
• Nickel Silicon Carbide (NSC) Plating: A durable, low-friction coating that offers superior oil retention and heat dissipation for a longer engine lifespan.
• Complete Bolt-On Kit: Comes ready to install with the cylinder, piston, rings, wrist pin, circlips, and a top-end gasket set.
• OEM Aesthetics: Designed to look identical to a stock Suzuki cylinder, keeping your performance gains looking clean and professional.
• Made in the USA: Proudly manufactured and plated in the United States to ensure the highest quality control standards.

Fitment List

Year Range	Vehicle Brand	Vehicle Model & Size
2004-2006	Suzuki	RM-Z250
2004-2005	Kawasaki	KX250F

Frequently Asked Questions

Q: Does this kit require any permanent engine modifications or machining?
A: No. The Cylinder Works 31001-K01 is a direct bolt-on replacement. It is designed to fit your stock engine cases without any drilling or machining required.

Q: Do I need to re-jet my carburetor after installing this big bore kit?
A: Yes. Because you are increasing displacement and airflow, you will likely need to adjust your jetting to ensure the proper air-fuel mixture for maximum performance and engine safety.

Q: What kind of fuel should I run with this high-performance kit?
A: We recommend using high-quality 91+ octane pump gas or race fuel to prevent detonation and ensure the Vertex piston performs at its peak.

Upgrade Your Ride and dominate the competition with the ultimate power upgrade from Moto-House MX.

Moto-House MX – Choice of Champions – is located in Clermont/Montverde, FL. The best motocross shop in Central Florida.

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Suzuki RM-Z250 Performance Parts and Accessories