Staintune Exhaust

[Scoobynut_imp]

Pretty. Look a lot like the stock pipe. I like that. What did you find about setting up the bike for the pipe, tuning wise? Did you weigh it?

Agreed, I liked that it suited the look and character of the bike, unlike some of the other slip-ons I've seen. As far as tuning, I can't imagine anything else will need to be done to the bike as the ECU will in short order learn new operating parameters for the exhaust. I don't know of any instances where adding a slip-on to a modern, fuel-injected bike requires any remapping of the ECU. A full exhaust may be another story.

Nope, haven't weighed it yet -- I don't own any kind of scale -- but it does feel lighter than appearances would suggest. I'm guessing around 8 lbs. It will be interesting to see how heavy the stock muffler is once I remove it.

Agreed, I liked that it suited the look and character of the bike, unlike some of the other slip-ons I've seen. As far as tuning, I can't imagine anything else will need to be done to the bike as the ECU will in short order learn new operating parameters for the exhaust. I don't know of any instances where adding a slip-on to a modern, fuel-injected bike requires any remapping of the ECU. A full exhaust may be another story.

Nope, haven't weighed it yet -- I don't own any kind of scale -- but it does feel lighter than appearances would suggest. I'm guessing around 8 lbs. It will be interesting to see how heavy the stock muffler is once I remove it.
I found this, about the PGM Fi adapting to different conditions..
http://powersports.honda.com/experience/...182ba.aspx

I found this, about the PGM Fi adapting to different conditions..
http://powersports.honda.com/experience/...182ba.aspx
Right, it adapts to atmospheric conditions but it does not adapt to changes in intake or exhaust flow.
It would take a real time fully closed loop system with wide band o2 sensors in every header for that.
I don't think the fueling is optimized as it is, even stock. That is why systems like bazazz and powercommander exist.

If the bike runs OK after the installation of an exhaust system its because the nature of a four cylinder runs fairly smooth under a wide variety of conditions.
Mapping would still maximize your engine's output and efficiency.

Flynbulldog, I did a little reading about PGM-FI for bikes and yes, you are correct -- and I was incorrect -- about the FI (not) adapting to changes in intake or exhaust flow.
The Staintune, in conjuction with leaving the catalyst and O2 sensor in place, is probably a minor enough change that it doesn't upset how the bike runs. I haven't noticed a single difference in how it runs from stock. So far I've put about equal miles on the bike with the stock muffler -vs.- the Staintune.

No doubt mapping would yield some nice benefits, but as far as a modern engine tuned for efficiency and low emissions, the CB's fueling is quite good stock, better than most in my opinion. It's good enough for me that I will probably not change the mapping.