Beefed-Up 12 Tooth 420 Chain Sprocket Kit With Five Eighths Inch Bore And Sixteenth Inch Keyway For Twenty To Thirty Series CVT Mini Bike Go Kart Sprockets 12T Fits 40 41 420 Chains Includes Sprocket Keys And Six Master Links Upgrade

12T 420 Chain Sprocket Kit with 5/8 bore for CVT mini bikes
✔️ Includes 1x 12T sprocket, 2 keys, 6 master links for 20-30 CVT

This 12 tooth 420 chain sprocket kit upgrades small CVT-powered mini bikes and go-karts by swapping the stock gear for a 12T with a 5/8 inch bore. It's ideal for flat-terrain cruising and lightweight performance builds.

✅ 12 tooth sprocket for 40/41/420 chain compatibility
✅ 5/8 inch bore to fit standard CVT shafts
✅ Includes 2 sprocket keys and 6 master links for quick install
✅ Dimensions: 54mm length (2.13"), 16mm width (0.63"), center bore diameter 16mm (0.63")
✅ Shaft key size 5mm

💡 What is a CVT chain sprocket upgrade used for on small power bikes?

This upgrade helps raise top end speed and drive efficiency on CVT systems. - Handy way to improve top end speed on flat terrain - Fits 40/41/420 chain profiles with a 5/8 bore - Includes 2 keys and 6 master links for easy installation - Durable metal construction for long-lasting performance ✝️