Yesterday I had to replace the 5" rear pully because torque from my 99cc Predator had sheared the 3/16" Key and innner hole of the pulley. After getting everything torn apart I was a little taken back at how the motor had done what it did. Think Im gonna have to look for pulleys that are made of something other than Zamak #3 material, preferably steel. Im sure its only a matter of time before it happens again. I have 100 hours on my Predator and if I conservatively consider it I have about 2000 miles on everything with a 9.6 to 1 final gear ratio. But its back to running today so I am happy.
