Robbie used to run a 300 tire in his bike but now he wanted to upgrade to 360, this created a few small problems because the swingarm was not wide enough and not long enough, and the Prowler RSD gearbox with an offset sprocket did not line up with the rear sprocket anymore. Robbie wanted to use a Tolle sprocketbrake but the swingarm he had did not leave enough room for the caliper and the chainadjuster bolts interfered with the brake caliper. Because the swingarm had already been modified before in a way that was not good enough in our opinion, we decided to make a new swingarm using only the front part of the old swingarm.