Forks look like 38mm RM units to me because of the pinched axle clamp, probably shortened/restricted a bit too. I have got an article somewhere that says beyond a certain shock length with stock swingarm, you need to cut off the brake cable lug on the frame or else the swingarm hits it. Protec were one of the very first to hit the market with their version of an alloy swingarm for the 370 and each side was parallel, but some months later when White Bros gave their design to Profab they went one better and put a bend/kink in the right side which enables the swingarm to clear the frame so you dont have to mod the frame, plus they had the mount for the brake cable guide and the Protec does not. .Totally bare WB arm weighs 2339g and Protec is 2657g with bronze bushes still fitted. FMF/Al Baker supposedly offered a banana option too but i have never seen one.
