A necessary piece to complete the drive train upgrade.  If you are looking at this, you probably already know the modifications that will be required.  If you are using this on a Razor with no tensioner you will most likely need to use a half link to get the proper tension. ***This is just one component part of a drive system upgrade.  Without the supporting components this product should not be purchased.*** If you have any questions regarding a drive system upgrade please feel free to email sales@midwestminimods.com and we will be happy to help you out.