I'm still having a serious problem with my shock even after a revalve and lighter spring. The rear end will kick violently sideways -probably 30 -40 deg out - after encountering certain rocks. This happens 2-3 tiimes during a days ride and will eventually result in a get-off. I'm thinking it's the old "Yamahop" or hydraulic lock when the stock piston can't pass oil fast enough on a high speed hit. Has anyone else noticed this and did the Gold Valve with it's large oil ports cure it? They've certainly solved that problem in my front forks.