I have a 2009 Joyner Trooper 1100. I found that the Joyner Trooper ball joints were very poor quality, so I simply bought a similar size ball joint and the angle reamer, and they are much more robust. I find that with my trooper, a few things are just not made well and can use a few design changes. By in Large, the trooper is a very hardy machine and can be run trouble free if you don't treat it like a 1100 lb dune buggy and take it out jumping , etc.