Motion Pro Chain Breaker Kit

Press Riveting Tool

Posted by Brad

Motion Pro Chain Breaker Press Riveting This link will lead you to the back end of your motorcycle -- to the chain, that is; and this is all about breaking one. The typical time of use for a chain-breaking tool is when installing a new chain, and rarely otherwise, except when changing sprocket sizes to alter your gear ratio. If your chain has somehow become too long and you can no longer adjust the slack out of it, this means it's worn out, not that you need to remove more links.

Motion Pro sells a breaker kit for chains from #35 to #630. The hand-sized tool has a cast body to give it enough rigidity to withstand the pressure of pushing a pressed-in pin through a link. Even so, grinding the rivet head down first is a good idea in order to be able to push that hardened metal through. For #520 and larger chains, grinding down the rivet head is imperative, and in fact recommended by Motion Pro.

Three pin sizes (2mm, 3mm, and 4mm) to fit most chains are included. Also in the kit are press plates for riveting hollow-nose master links.

This is billed as a light-to-medium duty tool. But most chains these days are in the upper realm of sizes, so if you use this chain breaker it's probably best to prepare well (thoroughly grind down the rivet head) and carefully align the pin to the center of the rivet before applying pressure. I think the best chain-breaker would be a massive, bench-mounted machine; yet a hand-held tool that works is still a lot better than a punch and a hammer, and lots easier to store when not in use.