If you're building or repairing a go-kart, mini bike, or other small vehicle with a torque converter (like a Comet TAV2), you might need this sprocket.

It's the drive sprocket that attaches to the output of the torque converter.

The key specs: it has a 5/8-inch bore (the hole in the center that fits onto the shaft), 10 teeth, and it's made to work with either #40 or #420 roller chain (they're very similar and often interchangeable).

This is a common size for many hobbyist and entry-level machines.

It's made of steel, so it's durable.

Before you buy, make sure this matches the chain size you're using and that the bore size fits your torque converter's output shaft.

It's a simple, critical component that transfers power from your engine to your wheel.

Keep a spare on hand, or upgrade a worn-out one for smoother operation.

A straightforward part for small engine enthusiasts.