SHARP Performance Products Quick Change Kart Gear Set
Video depicts the 1.25" system the 40mm system is very similar but given the register diameter of the sprocket the 40mm uses a shaft collar instead of the clamp. I will make a video of the 40 and 50mm system soon.

https://sharpperformanceproducts.my...

SHARP QC Gears

These are custom machined sprocket halves not just a standard sprocket cut in half! Each sprocket half is precision machined out of 7075 Aircraft grade aluminum. We custom machine each half separate to eliminate the gap found in traditionally cut sprockets.

Single tool fast gear changes
200% Reduction in inertia
50% Reduction in mass
MADE IN USA
You can order as a complete set or individually.

Skip to 3:55 if you want to see it in action!