Hey everyone- Last week I posted a thread about the walker speed-up kit, and I was responded with "don't do it." Well, all the horror stories that were written made me switch back to the stock pulley until I could contact my dealer about it. I called them yesterday and I was told that the new walkers already have a speed up kit in them, on the engine pulley. But I was told that the speed up kit I ordered was the correct one for a new walker, and It would not burn out my pumps, and would still be covered by warrenty. So I put the pulley back on and off I go. Hope this gives a little help to walker owners! P.s. I don't want any replys to this thread about how the walker is still too slow and to just buy a mid mount z, I love my walker and am very happy with it, thank you very much.