HardDrive Manual Primary Chain Adjusters

HardDrive manual primary chain adjusters make it possible for you to fine tune and lock settings for the best performance. Ideal for bikes equipped with big displacement engines, these replacements permit you to manually select tension and to lock in place preventing free play during severe shifting. They are made from anodized billet aluminum and are a direct replacement for the original equipment automatic version. You can tune many parts of your motorcycle for optimum performance, including your primary chain with HardDrive adjusters.