GREHUA Mini Bike Chain Tensioner + 420 Chain (42 Links) – CT200U, MB165/MB200, Predator

Overview

Upgrade your mini bike’s drivetrain with the GREHUA Mini Bike Chain Tensioner & 420 Chain. This kit blends a robust tensioner with a 42-link 420 chain, designed to support broader compatibility across popular mini bikes. Expect smoother chain flow, better alignment, and a straightforward install that fits a range of small displacement models without sacrificing ride quality.

Fitment & Compatibility

This tensioner and chain setup is tailored for the 420 roller drive chain and is compatible with a variety of popular minibikes and engines. Target models include Coleman CT200U and CT200U-EX BT200X lines, Baja and TrailMaster mini bikes, Massimo/Majestic/Massimo MB165 and MB200 variants (Warrior, Heat, Mini Baja), Axis M200, Falcon 200, Hensim MB165 & MB200, Realtre RT200, Tomberlin Firehawk, and similar 6.5HP to 212cc engines. If your ride uses a 420 chain with a 42-link configuration, this kit aims to align well with your setup.

• 420 chain, 42-link length, designed to pair with clutch-to-drive transmission systems
• Wide compatibility across common mini bike brands and models

Quality & Durability

The GREHUA chain and tensioner are built to resist wear and provide dependable guidance for the chain. A high-strength substrate and wear-resistant surface work together to help maintain proper tension and reduce misalignment over time. The tensioner helps guide the chain and supports smoother operation of the swing arm as you ride.

• Heavy-duty construction for regular riding, with straightforward disassembly and cleaning
• Designed to help preserve chain life by maintaining proper tension and alignment

What’s Included

• 1 x chain tensioner
• 1 x spring
• 1 x nut
• 1 x 420 chain with 42 links
• 2 x master links

Usage Tips

Regular checks of chain tension and alignment can help prevent common drivetrain issues. When installing, follow standard safety practices, and ensure the tensioner is correctly positioned to guide the chain without excessive binding. The included master links simplify restoration and maintenance tasks.

Why Consider Replacing

Replacing worn or damaged tensioners and chains can help preserve drivetrain efficiency, reduce the chance of chain derailment, and support consistent power delivery across riding conditions. Use as part of routine maintenance to keep your mini bike running as smoothly as possible.