05 March 2011
hacking the muffler
My stock muffler had a rattle at certain RPMs, and it was annoying. Also, going for a higher flow should make it run a little better. Looking online, I found performance mufflers for as little as $150, and up to $300.The single most expensive upgrade item! I could get a stock muffler for $60, but just to get rid of rattle? I found some other people who had modified their stock muffler to make it much more flow-through, but they had a different stock muffler than me.
Finally I took a little video to capture the new sound. To me it sounds like the 250cc motorcycles we used when taking the Idaho STAR course. A bit louder than before, and I can feel much more air coming out the tip. I took it for a short ride and believe I get smoother acceleration with slightly more pull. I really need to re-jet the carb to get more fuel, then lighter weights in the variator for more power. Next month!