I am now MX racing out in the midwest and gone from nice soft New York loam tracks to hardpack Nebraska tracks and the rear suspention on my 450 is giving me fits. No matter how I set up rear I either bottom out or the rebound acts like a catipult and tries to throw me. Two races into the season now and I have almost ate it twice, big time. I am a runner, know how to go fast, but now have to change riding style in order to control bike on landings, and to just keep rear from dancing all over. Front gives me no problems, just the rear. I am just getting frustrated. I am 260lbs with gear and still stock on suspension, any thoughts or ideas. Springs, a total R set up, just need a direction to go. I thought about going with a true R model, but I have artificial knees and the electric start is a god send, I can not really bend knees to get a good kick position. I am 56 and still running, got a few more years in me, love the bike, engine has been modded, bike stripped of all excess weight other than battery and starter, and I usually finish top 5 in the 40+ class. Even with all the suspension problems still hanging in there.