just fitted my ims tank and all you have to do is grind the reverse bracket of the frame and move it back just forward of the side panel and weld it in position. you still have to take a slice out of the left hand frame web to get it to fit.
I think I will try and make the Yamaha Raptor 660 Reverse Switch from Dubach Racing Development work. All I think I will have to due is shorten the cable end a little and it should work