I had a new motor built from a very reliable out of state engine builder with many performance parts. So I called a local performance shop to have it dynoed. I took the bike their and they dynoed it with the brand new knobby tire on it! Instead of changing the tire to a street tire, They didnt call me to ask if I wanted dyoned with the knobby. When I picked the bike up They said they didnt want to scratch my new wheels by changing the tire out. I looked over on their wall they had rim savers their. I guess they dont know how to use them! What moron runs a bike on the dyno with a knobby? They trashed my new tire and gave me very inadequate data. And the jetting was terrible. So I paid for this fool to trash my tire and not jet my bike properly and give me crap data that I wanted and paid for to be accurate. They gave me every stupid exuse in the book and blamed everybody but their self for the stupid mistake. I took the bike to a real performance shop afterward because I didnt want an idiot foolish enought to dyno a bike with a knobby to ever touch a motorcycle of mine again. The horespower the new dyno testing yielded was 14hp different from the real performance shop and the torque was 10ftpds diffrence and the rejetting made 2.8 hp diffrence and took the bog out of the bottom. The first shop wouldnt replace my tire and wanted me to bring the bike up to redo. I wouldnt return my bike to them after the made the choice to run the knobby with out calling and stupid enought to run it with a knobby I didnt have any confidence in them touching my bike at all.