I have a 2009 XR650L and want the larger Acrebis Fuel tank. Anymore, even a short ride for me is at least 80 miles and long rides can be several hundred. The small tank is getting on my nerves, so I am in the market for a larger fuel tank. However, I am told that the Acerbis tank will only fit newer models with major modifications. In this case what does "major" mean? What year do you have and did you end up needing specialty parts? Any advice is greatly appreciated. Be the Duck...