On my 2000 750 I extened the swing-arm 4-6 inches. I lowered the rear with those three slot dogbones. Rides great , but when I have a passenger on the back I have a tendancy to bottom out. How do I stiffen the rear suspention? Is this easy enough to adjust that I could do it on-the-fly? Any special tools? Is there are better setting for when drag racing?