Originally Posted by lukeinlondon
....but with the GSA it seems in terms of modifying the engine or 'un-corking' it their is not much to be done?
Do NOT change a thing, for two reasons. #1 doing so will likely make it run worse, decrease mpg, be less reliable, or any combination of the three. #2 You'll be wasting money. Keep in mind you're not buying a Harley!