CILOYU 420 Mini Bike Chain Kit — Red, 42 & 90-Link Set with 10-Tooth Sprocket and Tools

CILOYU Red 420 Chain Kit is a durable, alloy-steel replacement chain bundle with 42 and 90-link options, a 10-tooth sprocket, master link, chain breaker and tensioner for mini bikes like CT200U, MB200 and BT200X.

Replace worn drivetrain parts quickly with a ready-to-install chain kit tuned for popular small-engine mini bikes and go-karts. Built from wear-resistant alloy steel and finished in a red protective coating, this 420 chain assembly is sized and supplied to fit a range of Coleman, Baja, Hensim and Massimo mini bike models. The kit's included tools and hardware make installation and future maintenance straightforward, while the surface treatment helps extend service life in outdoor riding conditions.

Will this 420 chain fit my mini bike model?

Compatibility covers many common mini bikes that use a 420-series chain and 10-tooth drive sprocket. Check your bike’s engine and rear sprocket specs against the kit details to confirm match before ordering.

• Compatible with Coleman CT200U and CT200U-EX models
• Fits Baja Motorsports MB165, MB200 series (Heat, Mini Baja, Warrior)
• Works with Hensim MB165 & MB200, Massimo MB200 and TrailMaster MB200
• Designed for Predator 212cc, 196cc and other 6.5hp small engines

How durable is the chain and what materials are used?

The chain is manufactured from alloy steel with a specialized wear-resistant surface finish to improve corrosion resistance and longevity. That combination reduces rapid wear under normal trail and yard use but regular inspection and lubrication remain important.

• Alloy-steel links for strength and fatigue resistance
• Wear-resistant surface treatment to slow corrosion and abrasion
• Firm riveted connection to minimize breakage risk
• Made for routine riding loads typical of mini bikes and go-karts

What tools and extra parts come with the kit?

The kit includes a chain breaker, an additional master link and a chain tensioner so you can remove or size the chain and set correct tension without hunting for separate tools. These extras reduce installation time and help you return to riding faster.

• Chain breaker for cutting or shortening the chain to length
• Spare master link for rejoining the chain securely
• Adjustable chain tensioner to maintain proper alignment and tension
• 10-tooth drive sprocket compatible with 40/41/420 chain sizes

How should I install and care for the chain to prevent problems?

Proper alignment and tension are critical; misalignment accelerates wear and can cause failure. After fitting, verify sprocket and chain run in a straight line, set correct tension, and keep the chain clean and lubricated according to normal small-vehicle maintenance practices.

• Ensure sprocket and chain are aligned in a straight line after installation
• Use the included tensioner to achieve manufacturer-recommended slack
• Lubricate the chain periodically and remove debris after off-road rides
• Inspect links and master link for wear before each ride

Who is this for: Riders and home mechanics who maintain Coleman, Baja, Hensim, Massimo or TrailMaster mini bikes and need a complete, high-quality replacement chain kit. It’s aimed at owners who want a robust alloy-steel 420 chain with installation tools and a visible red finish for quick identification, whether performing routine replacement or outfitting a restoration project.