CILOYU 60T Sprocket 420 Chain Kit (40mm Bore) for Mini Bikes | Compatible with Coleman BT200X, CT200U-EX, CT200U, CC100X, Baja MB200, Doodlebug DB30

Upgrade your mini bike performance with the CILOYU 60T Sprocket kit

Designed for riders who value steady power delivery and reliable control, this sprocket and chain kit pairs a 60-tooth rear sprocket (40 mm bore) with a 90-link rear chain and a 42-link front chain. The included jackshaft sprocket and 420 chain breaker help maintain a smooth drivetrain, making it easier to manage torque when you’re negotiating uneven terrain or starting from a standstill. This kit is a practical upgrade for a range of popular mini bikes and compatible engines, enabling more confident launches and steady traction without requiring excess engine rpm.

Key benefits you might notice

• Significant improvement in low-speed torque compared with the original setup, which can help with starts and pulling power on slopes or heavy loads.
• Smoother starting and low-speed handling, reducing the need to rev the engine excessively and improving throttle response on tricky surfaces like mud or sand.
• Broad compatibility with many models, including Coleman BT200X/CT200U-EX/CT200U, Baja MB165/MB200, Doodlebug DB30, Motovox MBX series, and more, giving you a flexible upgrade option.

What’s included and how it helps

• 60T rear sprocket with a 40 mm bore for stable power transfer at low RPMs
• 420 chain rear, 90 links and 42 links for balanced drivetrain timing
• Jackshaft sprocket and a 420 chain breaker to simplify maintenance
• Complete hardware: screws, nuts, master links, and a 10T sprocket plus a 3/16" keyway

Fitment and usage tips

Compatibility spans a wide range of popular mini bikes and Coleman-powered setups, so you can upgrade with confidence. For best results, pair this kit with proper alignment and periodic tension checks, especially after installation or terrain changes. The kit is designed to support more robust starts and improved traction without promising guaranteed outcomes, so you can evaluate the benefits based on your riding style and terrain.

Real-world scenarios

Imagine climbing a gentle hill after a long ride, or negotiating a muddy track where throttle control matters. With a higher-torque setup and improved low-RPM response, you may experience steadier starts and more secure traction, enabling you to handle unexpected elevations or load shifts with less wheel slip.