My experience with OEM blets is that they are harder rubber, more clutch slippage, and iv burned belts before when they shudnt have, like trying to get over a little ledge washout on a trail. On top of all that, the two OEM ones I had were well within spec, almost brand new, broken in the correct way (easy first 30kms) and eashed before use, and they both blew, leaving nice black marks in my belt guard and kinking my speedo cable. They both delaminated in the same way and wasnt riding overly fast or aggressive, just let go.
My clutches run exceptionally hot though, which may be the problem, and although this is ususally due to misalignment, the clutches dont perform badly and im not lacking any performance when im smoking L/C 500's. I should check the alignment however, just to make sure...
With that said, Iv been running Ultimax 3's for a few years now, and all they do is wear down, not have one blow on me yet. They will be my replacement belt.
