Drivetrain› Belt and Chain Drive

Coleman Powersports

50-Tooth Rear Sprocket (#420 Chain, 40mm Bore)

$18.95

SKU: 1243-RS420-200

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In Stock
Ships by Aug 3
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INSTALL DIFFICULTY
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Easy — 1–2 hours

Description

The Coleman Powersports rear sprocket is a replacement component for various mini bikes and go-karts, designed to work with #420 chain. This sprocket has 50 teeth and a 40mm center hole diameter. Its mounting hole specifications include a side-by-side distance of 57mm and a straight-across distance of 80mm. The overall diameter of the sprocket is 20.9cm (8.25 inches). This part is specifically noted for use on Coleman Trail BT200X, CT200U, and CT200U-EX mini bikes. It is also compatible with Massimo and Baja MB165 and MB200 mini bikes. It is crucial to measure your existing chain or sprocket before ordering to ensure compatibility, as the #420 chain has a 1/2 inch pitch and a 5/16 inch roller diameter.

MIA's Description

The Coleman Powersports rear sprocket is a 50-tooth component designed for use with #420 chain. It features a 40mm center hole diameter and four mounting holes.

Fitment

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Specifications

BrandColeman Powersports
Part Number1243-RS420-200
CategoryDrivetrain

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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