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Discussion Starter · #1 · (Edited)
I have a 2007 R6s. It has a yoshimura pipe, and a power commander. I bought it brand new and I now have 10,500 miles on it. Since installing the yoshimura pipe a few months ago I noticed the sound difference. The sound is awesome when you get on it, but cruising it the pipe pops a lot and sounds almost like a boat exhaust under water. So I got a power commander and had a custom MAP installed. The map made it run a little better, but I was expecting much better out of it. The bike way dynotuned, but the pop of the pipe is still around. I was told yoshimura just has that sound, I was also told to get a spark arrestor to make it better, but what I started to think about was the spark plugs. I have never changed them yet and your suppose to change them at 8000 miles, I now have 10,500. Will changing my spark plugs make any difference at all, or should I just save my money and wait a little longer before changing the plugs? Also when I'm out riding I notice somedays my bike is running really good and idles so clean, and other days the idle jumps around a little bit and runs less responsive.
 

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Discussion Starter · #3 ·
Not sure. Where are those located? I have a California bike, so I know it's got a lot more smog crap on it than most states.
 

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T-1 is my Hero
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Every bike has them. You would have remembered if you took off the AIS
This is an install for an R6 not R6s as an example of where there located.
http://www.r6-forum.com/forums/showthread.php?t=61561&highlight=smog+block+plates


From the Graves website.......
"Graves Motorsports Smog Block Off Plates are designed to seal off the ports on the valve cover used by the air injection system (a.k.a smog pumps or AIS).

The air induction system (AIS) burns unburned exhaust gases by injecting fresh air (secondary air) into the exhaust port, reducing the emission of hydrocarbons."
http://www.gravesport.com/cgi-bin/shopper?preadd=action&key=AB__011

From what Iv read it fixes the pop some people get on decel and from what your saying I'm pretty sure this is the culprit.

Here's a link where people just talk about it, Just read what Paytheon says hes pretty much the man.:fact
http://www.r6-forum.com/forums/showthread.php?t=67774&highlight=smog+block+plates
 

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T-1 is my Hero
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I was also thinking about it and this came up with using the block off plates,

"To get an accurate Air:Fuel (A/F) ratio when dynoing the bike. The air injection system pumps fresh air directly into the exhaust stream in order to burn off any unused fuel. Unfortunately by doing this the A/F ratio is thrown off by the extra “fresh air” in the exhaust stream. By removing the air injection system you can achieve an accurate A/F ratio."


I hope this solves your problem.
 
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