60T Sprocket 420 Chain Rear Kit for Mini Bike - Stronger Torque

In this review the 60T sprocket 420 chain rear kit is evaluated for riders who need a straightforward replacement or upgrade for small mini bikes and go karts. The kit's biggest selling point is its complete nature: a 60 tooth rear sprocket with a 40mm center bore plus both a 90-link rear chain and a 42-link front chain, a jackshaft sprocket, master links and a chain breaker, so installations can be completed without hunting for parts. It is a practical review for DIY mechanics and owners of compatible Predator, Coleman, Baja and similar mini bike platforms.

Key Features

• Complete kit: Includes a 60T rear sprocket, 90-link rear chain, 42-link front chain, jackshaft sprocket, master links, fasteners and a chain breaker so users receive everything needed for drive train replacement.
• 40mm bore: The 1.57in center hole fits common mini bike rear hubs that use a 40mm bore, simplifying installation on many small engines and frames.
• Improved acceleration: The larger 60 tooth 420 sprocket is designed to raise torque and climbing power, helping low-speed acceleration on rough or hilly terrain.
• Precision tooth profile: Machined chain teeth smooth power transmission, which reduces premature chain wear and extends drivetrain life when installed and aligned correctly.
• Multiple hole pattern: Modified multi-hole mounting design increases compatibility across a range of models, reducing the need for custom adapters on many mini bikes.
• Includes tools and hardware: Supplied master links, screws, nuts and a 420 chain breaker let a mechanic assemble and size the chain without separate tools.

Who It's For

This kit is best for owners of small mini bikes, go karts and hobby vehicles powered by 196cc to 212cc engines who want a durable, complete replacement drive set. It suits DIY mechanics who prefer a single-purchase solution that includes chains, sprockets and the breaker so work can be completed in one session.

It is not ideal for machines that require a different bore size or an exact factory hole pattern without modification; riders whose frames or hubs use nonstandard spacings should verify the 40mm bore and the listed 49mm and 80mm bolt circles before ordering.

Pros & Cons

Pros

• Complete package eliminates the need to source separate chains, links and tools.
• 60 tooth sprocket boosts low-end torque and climbing ability on small engines.
• Precision tooth geometry helps reduce wear and improves chain life when aligned properly.
• Multiple mounting hole options increase fitment across common mini bike models.

Cons

• Requires checking hub bore and bolt circle compatibility; some bikes may need minor modification.
• Heavy-duty users should still inspect chain tension and alignment periodically to avoid accelerated wear.

Specifications

Brand	CILOYU
Rear sprocket teeth	60 tooth
Center hole diameter	1.57in (40mm)
Mounting hole circles	6-hole 1.93in (49mm) and 4-hole 3.15in (80mm)
Included chains	420 chain 90 links (rear) and 420 chain 42 links (front)
Included tools and hardware	5 master links, 10 screws, 10 nuts, 3/16in keyway, chain breaker

Our Verdict

The 60T sprocket 420 chain rear kit is a solid value for mini bike owners who want a single, ready-to-install drive train replacement that increases low-end torque and comes with the necessary installation hardware. Buy this if your hub matches the 40mm bore and common bolt circles; those with nonstandard hubs should confirm fitment or look for a sprocket that matches their exact mounting pattern.

Frequently Asked Questions

Will this fit a Predator 212 engine setup?
Yes, the kit lists compatibility with Predator 196cc and 212cc engine platforms commonly used in mini bikes and go karts, but confirm hub bore and bolt circle fitment first.

Is the chain length adjustable?
Yes, the package includes a chain breaker and master links so you can shorten the 90-link rear chain or trim the 42-link front chain to the required length.

Does the kit include a jackshaft sprocket?
Yes, a jackshaft sprocket is included along with fasteners and a keyway for installation.