GM1

While there are several parts under test that may be included in the Extreme at a later date, the only "updates" I know of have already been placed in the Extreme. All Furys with constant drive have the set screws(in the gold bottom bearing holder) in the constant drive to prevent slippage. It's easy to see if they are there as they are clearly visible. The rear channel bearing is red loctited and screw retained in the channel but that has been standard also in later Expert and all Extreme kits. The one update that is now available is the new 90 degree fuel fitting that works on all Furys. There are also different durometer O rings ( 2 grades of harder dampers) available for guys that want to try them in the metal head block. I am trying them now to see if I can get a better "feel" with a different O Ring/Shim combination.