I'm surprised the YFZ is having problems, but I guess any factory frame will succomb to the stresses of motorcross. I was hoping the Honda is alot stronger then the KFX/LTZ, I cracked a frame tube on my KFX after only 7 months. I want to do more MXing, the Kawi needed full gusseting and some help with suspension, so I traded it for a TRX(after properly fixing it!). The Honda frame looks much more beefy than the KFX, especially around the front suspension, but only time will tell.
waiting for the R so I can test this theory myself! ^_^
If anyone finds weakspots, let us all know where.
-RR