when we bought the machine a couple years ago the man we bought it from told us the bars had just been turned,they looked to have plenty of tooth height but we got to noticing that it wasn't handling tough crop conditions as well as it once did,pull one of the bars and got a couple of the neighbors to look at them both said they weren't completely worn out but were getting flat on top,so we bought a set from Oakley combine that had been rebuilt and every other tooth cut out, the salesman said we would be able to tell a big difference especially in tough crop conditions,installed them and found the adjustment scales to be off enough one had to have the slots lengthened, got the cylinder clearance set right, tried it in 140 bu.corn it was handling all the corn the head could handle and the engine didn't pull hard at all,ran it the other day in some 50 bu beans and there was a lot of difference in how well it was performing ,after the sun set they were starting to get damp and I was trying to finish the field, man what a difference those bars make couple of times I let the reel get a little out of adjustment letting some pile up on the head before the auger would grab it and run it through ,the motor would barely grunt when it went through the cylinder where as with the old bars you could hear it cry when a wad of damp bushes would go through