I have a new first generation 4G kit which has a tapered crank shaft that has never worked. I replaced the pully bearing 3 times and all 3 failed. Since I bought this kit from Spooky Tooth when Roland owned it I'm pretty much **** out of luck and out some $430.00 for this piece of crap kit. I even wrote Don Grumbee himself and there does not seem to be much any one can do for me. Every one talks to me like maybe I don't know what I'm doing or I'm doing something wrong. I raced motorcycle ,worked at a motorcycle dealer and built a bike that factory KTM asked to borrow a pro to race super moto on . The fact is that Don Grumbee sent 150 replacement one way bearing to Spooky Tooth to try and cover all the problems the first 4G motors had with the motors. Is there any one else out there with the same problem and if so a Law Suit should be brought against these first motor that were inferior!