Yeah slinger, MOST replacement pipes will fall short on good performance for 4 stroke engines, but when you read the small print (not legal for street/ highway use) you are getting into the pipes that DO make a noticeable diff. I have a friend in L.I., N.Y. who has been racing Honda engines for 30+ years, and If he suggests something, I listen. Billy turned me on to Technigas almost three years ago, and everyone I know that has used their stuff has been satisfied. The tough part for me is getting a carb tuned right over the noise of an open exhaust. The People at Technigas will also give you BASELINE specs for your carb depending which pipe you want to run,and your cylinder,cam valve train set up. I think the link I posted for franx will also apply to your scoot. I found it's ALWAYS better to spend the money to call, and ask about your situation dirrect.
