High Speed 12T Sprocket Kit With Five Eighth Inch Bore And Spacer For Twenty To Thirty CVT Mini Bike Go Kart Chains Forty Forty One And Four Twenty For Coleman KT196 CT200U BT200X CT200UEX Upgrade From Stock 10T To 12T For Faster Top End On Flat Terrain

High-Speed 12T Sprocket Kit for 5/8 bore CVT Mini Bikes
✔️ 12-tooth sprocket, 5/8 bore, fits #40/41/420 chains

This high-speed sprocket kit is designed for 20-30 CVT systems on mini bikes and go-karts using #40/41/420 chains. It’s a straightforward upgrade from the stock 10T to unlock faster top-end on flat terrain, making cruising and small-track sessions more exciting. The kit includes one 12-tooth sprocket and three spacers with zinc coating for anti-rust protection, ensuring a reliable upgrade path.

✅ 12-tooth sprocket for #40/41/420 chains
✅ 5/8 inch bore with a secure 3/16 inch shaft keyway
✅ Includes three spacers (3/4 inch ID) with zinc coating for anti-rust
✅ Height 0.63 inch (16 mm) and inner diameter 5/8 inch (16 mm) for compatibility

Dimension	Inches	Millimeters
Height	0.63"	16 mm
Inside Diameter	0.625"	16 mm

💡 What is a sprocket kit used for in CVT mini bikes and go-karts? This handy upgrade helps you get more top-end speed while keeping drive chain alignment.
- Improves gearing for flat-terrain speed gains
- Keeps compatibility with #40/41/420 chains and 5/8 bore
- Durable construction for high torque and heat resistance