People are going to come and say "back pressure is evil". Let me tell you, my previous GSXR's with baffle out, it was louder, but it lacked some downlow oomph, put baffle in and it got it back. I recently did a few things to my motorcycle, I finally decatted, and muffler box deleted. I have been procrastinating for a year. I did it, had it refreshed by dano did the fueling adjustments and got it back.
Immediately after decat, I got the little lump idle noise I kept hearing rapido talk about. I sent it out to be reflash, he added the fuel and did the adjustments, I also deleted o2 sensor why I was at it. Received it, and it still does the lump. I am using the stock end can, and its basically a straight through design. No baffling.
I read about people using aftermarket exhaust and since they have baffles it toned the bike up! I don't have that option and I have been thinking. Here I am thinking about how to get the low end fixed up, it has that 1000-1000-1000-1150-1000-1000-1000-1150 idle and at any real speeds doesn't matter, but at like 5-10mph that is 10% of the rpms and I can slightly feel it, that's why I sent for the reflash.
Anyway!. when I was sitting at home, I was bored and thinking of ways to prove its back pressure, I got a sock, and shoved it up to the exhaust while idling, blocking some of the airflow, and wallah the bike stayed idling 1k purrrrring. I taped that **** sock to my muffler blocking some of the opening, and went around for like 5 minutes around the block and ****. it seriously fixed it. Now, im not going to ride around with a sock in my exhaust that's stupid but it proved a point. BACKPRESSURE IS NEEDED for me at least.
I ordered a stupid little dirt bike looking baffle, called and arrestor, it arrives tomorrow. It doesn't look like much, but I ran across it while searching for baffles on revzilla, it appears to be the exact same diameter as the stock end can opening. so, in theory. Im gonna put it in, and if it needs it, maybe a few drops of sealant to tac it in the hole. It looks like a wire mesh net thing, and to me that should reduce the free flowing tip somewhat. If it doesn't reduce it enough, I can put some sealant on some of the net and block holes, and if it is too much reduction, (doubt it) I can drill a few small holes in it.
I finally set my TPS, well I checked it. It was 1.099-1.100 so I left it, I guess I really did have perfect spec from factory. scored the oem Suzuki harness for 18 bucks so figured id check. I read that the multimeter (10 dollar DMM) could even be off a little and could be between the 1.10-1.14 more so. Decided not to mess with it.
oh. I don't know my login, and fetching password doesn't work. so im back. Do you think the little arrestor(baffle looking thing) is going to create any resistance exiting the exhaust? I didnt lose any $ with the little baffle, it was supposed to be here Thursday *gauranteed 2 day delivery*, called them and asked why it was pushed to Monday, their inventory was inaccurate and actually did not have it. So they gave me $20 bucks back, so I paid like 8 dollars for the piece.
Not too mad, just anxious for tomorrows tweaking/testing.
Last edited by PengWinnin; 09-22-2019 at 09:09 PM.