YOXUFA 420 Chain Kit for Mini Bike — 42-link Jackshaft + 90-link Rear, Includes Master Links, Breaker & Tensioners

YOXUFA's 420 chain kit replaces both the jackshaft 42-link and rear 90-link chains, supplying master links, tensioners and a breaker for a ready-to-install mini bike drivetrain upgrade.

Designed for popular 200cc–212cc mini bikes and small engines, this comprehensive chain pack provides the correct lengths and tools to swap worn chains quickly. The kit targets Coleman CT200U series, BT200X, Baja/Warrior/MB200 models and many Predator and Hensim-powered bikes, combining durable materials with included hardware so you can adjust, secure and maintain the new chains without extra parts.

Which mini bikes and engines will this chain set fit?

This kit is meant for a wide range of small-frame off-road and recreational mini bikes that use 420 chain sizes. It fits Coleman Powersports CT200U, CT200U-EX, BT200X, several Baja Motorsports mini bikes, Hensim MB165/MB200, Massimo and TrailMaster MB200 models as well as bikes powered by Predator 196cc/212cc 6.5hp engines.

• Includes both 42-link (jackshaft) and 90-link (rear drive) chains for direct replacement.
• Compatible with popular Coleman CT200U family and BT200X models.
• Works with Predator 196cc/212cc and similar 200cc class powerplants.
• Also fits MB165/MB200 variants from multiple manufacturers.

How durable is the chain and how was it made?

The chains combine a robust base alloy with a hardened surface layer for extended wear resistance and longer service life. Manufacturing involves repeated forging and strict material controls to maintain tensile strength and consistent link quality under drive loads.

• High-strength base material with hardened surface treatment for wear reduction.
• Forged links and controlled production for predictable durability.
• Designed to resist stretching and premature failure in typical mini bike use.

What installation and adjustment parts are included?

YOXUFA supplies the essential installation hardware so you can install and tension the chains without searching for extra tools. The kit contains a chain breaker, two adjustable tensioner bolts, and four master links to fasten and fine-tune chain length and fitment.

• 1 x 42-link jackshaft chain and 1 x 90-link rear drive chain ready to mount.
• 4 master links for securing chain ends; easy to assemble and remove.
• Chain breaker for link removal and trimming to exact length on-site.
• Two 15mm tensioner adjusters to set proper slack and prevent derailing.

How will this kit affect maintenance and ride reliability?

Replacing worn chains with a matched pair reduces noise, improves power transfer and helps avoid sudden failures that could strand you. Proper use of the supplied tensioners keeps slack within safe range to prevent rapid wear of sprockets and driveshaft components.

• Correct chain length and solid master links reduce risk of derailment.
• Tensioners let you maintain recommended slack, extending component life.
• Included breaker lets you trim to exact fit without extra trips to the shop.

Who is this for: This YOXUFA 420 chain replacement kit is aimed at owners and mechanics of small off-road and recreational mini bikes who need a complete, ready-to-install drivetrain refresh. If you maintain Coleman CT200U series machines, BT200X, MB165/MB200 variants, or mini bikes using Predator 196cc–212cc engines and want a durable matched pair of chains plus the tuning hardware to fit them properly, this kit provides the parts and tools to get the job done efficiently.