CQSPMOTO 40T High Speed Rear Chain 6 Hole Sprocket # 40 41

The CQSPMOTO 40T high-speed rear sprocket is a 6-hole, 37mm-bore replacement sprocket engineered for #40/#41/420 chains to restore reliable power transfer and improved low-end torque on minibikes and small ATVs.

This precision-machined sprocket is built to replace worn rear sprockets on a broad range of minibikes and small-engine machines, including Coleman CT100U, CC100X, Baja Doodle Bug DB30, Mega Moto MMB80/MMB105, Motovox MBX10 and many similar models. Supplied with six mounting screws and finished with a corrosion-resistant galvanized coating, the CQSPMOTO 40T unit is designed to offer a dependable fit and durable service under normal riding conditions.

Will this sprocket fit my minibike or small engine?

The sprocket has a center bore of 37mm and six mounting holes; it’s intended for rear-wheel setups that use #40, #41, or 420 chain sizes. Always compare the bore diameter, mounting-hole pattern, and tooth count to your current part before ordering to ensure compatibility.

• Center bore: 37mm (measure your hub to confirm)
• Mounting pattern: 6 holes — matches common minibike hubs
• Chain compatibility: #40 / #41 / 420 chains
• Included hardware: 6 mounting screws for installation

How does the 40T sprocket affect performance on hills and starts?

With 40 teeth, this sprocket increases the rear-wheel leverage compared with larger sprockets or higher tooth counts, boosting low-end torque and improving initial acceleration. That translates to better hill-climbing ability and more responsive takeoffs without changing the engine or front sprocket.

• 40T tooth count optimized for torque and acceleration
• Improved low-speed control for inclines and rough terrain
• Works with existing front sprockets and chains sized for 420-series

What materials and finishes protect the sprocket from wear and weather?

The sprocket is fabricated from high-strength steel to endure the stresses of chain-driven power delivery, and it receives a galvanized coating to resist rust and surface corrosion. The result is a component that maintains structural integrity and appearance with routine maintenance.

• High-strength steel construction for load resistance
• Galvanized finish for corrosion protection
• Durable tooth profile to minimize premature wear

How easy is installation and what comes in the package?

Installation is straightforward for anyone familiar with rear-sprocket swaps: remove the wheel, unbolt the old sprocket, align the 37mm bore and 6-hole pattern, then secure with the supplied mounting screws. The package includes one 40T sprocket and six matching fasteners so you won’t need extra hardware in most cases.

• Package contains: 1 x 40T sprocket and 6 mounting screws
• Simple bolt-on replacement for compatible hubs
• Verify hub spacing and chain alignment during installation

Who is this for? The CQSPMOTO 40T 6-hole rear sprocket is ideal for riders, mechanics, and minibike owners seeking a robust, torque-focused replacement part for small-engine recreational vehicles. It suits users who need a reliable, weather-resistant sprocket for #40/#41/420 chains and who can confirm a 37mm hub bore and 6-hole mounting pattern before purchase. If you want stronger low-end pull, dependable chain engagement, and a drop-in replacement that includes mounting screws, this sprocket is a practical choice.