Great post. So basically a straight through pipe is better than having any kind of baffle on the bike. For some reason I thought you wanted some small amount of pressure in the exhaust, but by your description I wouldn't.Maybe I will reopen that hole where the baffle meets the header pipe. My neighbors wont like it, but their teenagers used to wake us up too.-Rick
Ace, thanks once again for a fascinating (and for me), timely treatise. Timely because I am in the midst of a stage 2 head conversion with 32mm Mikuni and K&N filter. I already have the freeflow exhaust, albeit with baffle. So if I understand you correctly, the peashooter muffler shape is enough of a restriction to create the correct backpressure without the baffle, and is not what is referred to when we say "open pipe". I guess what I'm asking is , does it make sense to go the whole hog and remove the baffles and just tune the carb accordingly? Thanks again. Chuck.
I don't think noise will be an issue. You should hear some of the bikes around here. Not to mention the sirens, garbage trucks, construction crews, car stereos... you get the picture.
Quote from: Chuck D on March 31, 2009, 08:03:56 PMI don't think noise will be an issue. You should hear some of the bikes around here. Not to mention the sirens, garbage trucks, construction crews, car stereos... you get the picture. Well, if you want max power, then use an unrestricted header pipe with an open tapered megaphone that has a 3.5" opening at the end, and make the entire length of the exhaust from the exhaust valve head to the end of the megaphone about 48" total length.
with 32mm Mikuni and K&N filter.
Quote from: Chuck D on March 31, 2009, 06:36:52 PMwith 32mm Mikuni and K&N filter.Chuck, is that a flat slide, and if so what are you using for jets and needle?Thanks,-Rick