my front wheel had a wobble the 2nd week after I got a 400ex. I stepped up from a 250ex that I outgrew and figured hey bigger shocks fast quad lets try some new stuff. Bad idea when its a 10ft up sloped then does into a 90 degree cliff for 4-5ft jump thing. It wasnt supposed to be a jump :/ I did it 4 times then landed wrong and flew off the side of my 400 down about a 8-10ft drop. Well after I fell here came my new 400ex dropping that far down onto my legs haha that bent my wheel and basically made me paralyzed for 2 days until I could move my toes again haha at least I could limp after the 1st week