There are old posts that refer to an "ebay performance camshaft" for the 200x. I see a seller called bikerchicks that has one for around $60.00. Is this the one that earlier posts were referring to as a mid range performance cam? Would it be good with the Powroll $100 valve springs and retainers for some added performance? Currently running a 10.5 to 1 compression and stock carb, DG exhaust.