The 1972-1976 Yamaha YZ MX 100 250 400 Chain Tension Roller is a high-quality replacement part produced by HFM. This chain tension roller, with part number 01-3100, serves as a crucial component in ensuring proper chain tension and performance for your Yamaha motorcycle. Designed specifically for Yamaha models from 1972 to 1976, this roller provides durability and functionality to keep your bike running smoothly on the track or trails.