
Originally Posted by
manbearpig
I would advise you to keep the 155. It was likely installed by the previous owner who rode in sand. Your motor only has the fuel it burns and the air traveling over it to cool it. Sand will rob power, overheat, and melt down an air cooled 2 stroke motor in minutes if not jetted properly. Yes, 150 was the stock size, and you dont have any 'high flow' mods that would require a larger main, but for the dunes, fat is safe, and safe gets your bike through the entire weekend. youre not gonna win any drag races up test hill with that thing, so just getting it to live is your main goal. It will probably run just fine with the 150 at Corral Canyon or Pine Valley, but take it to Gordon's or Superstition and it will run hot. Jet for the long haul. Improper jetting gets expensive, real fast.