i think a nutles monkey could change the jets. LOL, dude the jets are already in your carbs, losen the clamp connecting the carb to the boot, spin the either way so you can see the bottom of the carb, 4 philips head screws will be there, remove all of them, (righty tighty - lefty loosy) , pull the bowls off, and the main jet is the biggest one in there, change that out to the recommended jet, put bow back on and then screw the screws back in. rotate back, and tighten the clamp back down. Reallly wouldnt take to mechanic, do everything i just said and you will be completely done. Add a filter, then you might have to mess with the pilot, another easy task. Hope this helped!