Hot Rods 97-00 Yamaha YZ 125 125cc Wrist Pin Bearing

This is a Hot Rods wrist pin bearing for your 1997-2000 Yamaha YZ 125. It's a small but crucial part that sits between the piston pin and the connecting rod, allowing the piston to pivot smoothly as the engine runs. Without a good bearing here, you'll get excessive wear and noise, and eventually, engine failure.

Hot Rods builds these bearings from hot-rolled ASTM 4115 steel, which is a strong material chosen for its durability. They then case-harden them to a hardness of 58-62 on the Rockwell C scale. This process makes the surface extremely tough, able to withstand the constant friction and impact it experiences during operation, while the core remains a bit more flexible to absorb shock. This combination helps ensure a long service life for your engine's top end.