Modified Mini Bike 420 Chain with 40 Tooth Sprocket Kit 40mm Bore

About this item

This 420 chain conversion kit swaps in a 40-tooth sprocket with a 40mm center bore, offering both a 6-hole (49mm) and 4-hole (80mm) mounting pattern to match a wide range of mini bikes and go-karts. It works with Predator 212cc/196cc/200cc 6.5hp engines and models from Coleman, Baja, TrailMaster, Massimo, Hensim, Motovox, Monster Moto and more. The box includes everything needed for the swap: the 40T sprocket, a 16mm-bore 10T sprocket, keyway, chain breaker, master links, hardware, and two 420 chains (90-link and 42-link). The larger sprocket size improves torque and climbing power while keeping chain wear low.

• 40-tooth sprocket built for 420 chain, with a 40mm center bore and two bolt patterns: 6-hole at 49mm (1.93") and 4-hole at 80mm (3.15") center-to-center
• Fits Predator 212cc/196cc/200cc 6.5hp engines plus mini bikes and go-karts from Coleman, Baja, TrailMaster, Massimo, Hensim, Motovox, Monster Moto, and Axis M200
• Covers models like Coleman BT200X, CT200U, CT200U-EX, CT100U, CC100X, KT196, Baja/Hensim MB165 & MB200, TrailMaster MB200/MB200-1/MB200-2, and Doodlebug DB30
• Kit includes the 40T sprocket, a 10T sprocket (16mm bore), 3/16" keyway, chain breaker tool, 5 master links, 10 screws and 10 nuts
• Also comes with two 420 chain lengths: a 90-link and a 42-link chain, ready for installation
• Larger sprocket size boosts torque, acceleration and hill-climbing power while reducing chain wear over time

Specifications

ASIN

‎B0FD2N9F3L

Item Weight

‎4.49 pounds

Manufacturer

‎CILOYU

Best Sellers Rank

#34,360 in Automotive (See Top 100 in Automotive) #5 in Powersports Sprockets

Item model number

‎CO-40-SP04

Package Dimensions

‎8.7 x 7.09 x 1.5 inches

Date First Available

‎June 13, 2025