We developed the most versatile swingarm upgrade available for the Razor MX500, MX650, and SX500 on the market today. We didn't stop at the swingarm though, we've put together a collection of upgrades that completely change the ride of these little bikes and make them an absolute blast to rip around on. We've done the leg work spending tons of time and money trying different set ups to figure out what works and what doesn't. Our goal is to help you save time and money so reach out if you have any questions.