2007 CRF450R 170 pounds Fast B Rider Bike originally had 5.7 rear and .47 fork springs, valved for a mix of mx and woods. I purchased the bike from the owner of a suspension company, so when I bought it he changed the rear to a 5.5 and left the fork springs the same. I was bottoming out everywhere and literally almost killed myself a few times as a result. Brought it back to him and he stiffened up the midvalve. It made the bike much better, but i still thought it dived too much and couldn't handle big hits. Went off race tech's new spring rate calc. (much more advanced then before), and ordered a 5.6 rear and .48 fork springs and installed them myself with a 365cc outer chamber oil level. Spring rates felt better, especially on landings, but bike still felt really harsh. I think the valving is just completely out of whack, it never seemed to work right regardless of spring rate. Bike also has FC oil lock collars and outdoor spring seats. Im pretty confident with doing my own suspension now, just not really sure what to do as far as valving goes. Only god knows whats currently in there. I was thinking of just dropping the money on the racetech gold valves just so I could have a kit layed out for me. I've been doing more and more research and it seems a stiffer spring rate with slightly softer valving is the way to go. Does anyone have any shim stack recommendations for me? Im sick of paying someone to screw my suspension up, I'd rather do it myself. EDIT: I was also considering changing the fork pressure springs to the FC 1.76kg, I heard that makes a big difference in the chop.