Heres the arm for my next unit... Yamaha XT660R dirt leaner..
Its made from 32mm OD X 3mm stainless pipe..Has a 3:1 leaverage
ratio to the shock... " thats not the shock I will be useing"
The 17" wheel is from the rear of a Suzuki FXR150.. I replaced
the 17mm ID bearing with 3/4" ID.. biggest I could bore the wheel for...
The end of the shock conected to the frame will have a ride hight/leveling
adjuster of some type... not thought that far ahead yet... The arm
will pivit on bronze bushes...