TDRMOTO Piston Rings Set – 47mm Bore, 13mm Pin – For Chinese 70cc/90cc Dirt Bikes (Thumpstar, Atomik, Pit Pro)

Rebuilding a small Chinese dirt bike engine?

This TDRMOTO piston ring set is what you need.

It’s a 47mm bore size with a 13mm pin diameter.

These rings are designed to fit a bunch of common 70cc and 90cc engines found in bikes like Thumpstar, Atomik, and Pit Pro.

They’re brand new and ready to install.

If you’re doing a top-end rebuild, having fresh rings is crucial for good compression and performance.

Just match up your measurements to make sure they’re the right ones.

It’s a simple part, but an important one.

Get your little pit bike ripping again with these rings.