CILOYU 35 Chain Mini Bike Rear Sprocket 40T – Compatible with Coleman CT100U, MBX10/MBX11 & More
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Description
xMeet the CILOYU 35 Chain Mini Bike Rear Sprocket 40T, a compact drivetrain upgrade designed for small bikes and go-karts. The 40 tooth rear sprocket works with a 35 chain to create a streamlined, efficient transmission that can sharpen throttle response without adding bulk to the ride. Built to endure the bumps of outdoor use, this sprocket blends a lightweight profile with sturdy construction for daily reliability on your favorite back roads.
Engineered for rugged use, the sprocket and chain are machined from a durable metal alloy, delivering dependable performance through the jolts of off-road trails and neighborhood commutes. The finish and precise geometry promote smooth engagement with the chain, helping keep lubrication and wear under control during long sessions.
Wide compatibility
- Fits a broad range of popular mini bike models and entry-level powersports, including Coleman CT100U family and RB100/Trail 100 variants
- Also compatible with Baja Motorsports Doodle B models, DB30 variants, Motovox MBX10/MBX11, Mega Moto MM-B80, and related 105cc class machines
Durable construction
- 40T rear sprocket and 35 chain are machined from a resilient alloy, designed for longevity under real-world riding conditions
- Six mounting holes and refined spacing support easier alignment and installation, reducing setup time
Efficient power transmission
- The 40T rear sprocket can help increase speed on flat surfaces, while the engine may run at lower RPM to potentially extend range
- Compact drivetrain geometry helps reduce energy waste during cruising and acceleration, contributing to a cleaner overall ride
Size and fit details
- Mounting hole distance: 49 mm (1.92 in); centre hole diameter: 37 mm (1.45 in)
- Tooth count: 40t; chain size: 35 chain
- Note: This sprocket is 40 teeth, smaller than many original 75T setups; the chain can be shortened as needed
In practical use, riders may notice easier installation thanks to the six-hole mounting pattern and a compact footprint that reduces chain tension adjustments. The combination is designed for enthusiasts upgrading a mismatched drivetrain, offering a cleaner look and predictable engagement. Results vary with bike setup and riding conditions, but this sprocket represents a thoughtful upgrade for compatible mini bikes and go-karts seeking a lighter, more efficient rear drive.
FAQ
Q: Is the CILOYU 40T sprocket compatible with my mini bike?
A: This sprocket supports many popular models, including Coleman CT100U and Motovox MBX series; check mounting holes and tooth count for a proper fit.
Q: What should I know about installing and adjusting the chain?
A: The sprocket is 40 teeth and the chain is 35, with a 49 mm mounting distance and 37 mm center bore; you may need to shorten the chain.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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