Universal joint intallation tool. If you've ever struggled to hold the universal joint vertical while pressing it into the swingarm, you will know the function of this tool. Guzzi universal joints are an interference fit into their carrier bearings, which requires that the joint be pressed into the bearing for proper installation. This tool holds the universal joint vertical, preventing it from flopping around while you apply installation pressure. Never use a hammer to install a u-joint, it is easy to damage the needle bearings and drastically reduce the life of the joint.
This tool will only fit the best quality universal joint 30328031. It will not fit the other versions.