The CB1100 Community Forum

Note that Arrow has posted a dyno chart for the CB1100 stock, with slip-on and with baffle removed. With the baffle in, horsepower is very close to stock. With baffle removed, you get a small gain right at the top.

I am happy with the Arrow, because I was looking to save weight and make just a little more noise.

I don't want to add PCV if I do not have to. They require blocking the O2 sensor, which defeats the stock ECU ability to adjust air/fuel ratio. I like my 56mpg on the highway.

If you want to make a lot more power, you have to remove the cat. Arrow does make a nice looking header with no cat.

I installed a Yoshimure RS3 slipon on my 2014 standard. No need for a PC V unless I'm changing out the head pipe without a cat and changing to a K&N or more free flowing air filter. The stock ecu is more than capable for compensating the air fuel ratio on today's fuel injected bikes with just a slip on installed.

Those torque numbers are very good! your tuner did a good job maximizing low end and midrange on the power band.

(03-20-2015, 06:58 AM)uscgmac_imp Wrote: [ -> ]I installed a Yoshimure RS3 slipon on my 2014 standard. No need for a PC V unless I'm changing out the head pipe without a cat and changing to a K&N or more free flowing air filter. The stock ecu is more than capable for compensating the air fuel ratio on today's fuel injected bikes with just a slip on installed.

I am sorry, but i do have a question to your statement .... how does the stock ECU know that there is aftermarket slip on installed, especially, if the O2 sensor is before the cat ... ? Or in other words, an after market slip on is good for sound and weight saving, but unless you change the fuel mapping, nothing will change the HP/Torque output.
Not sure if our detuned 1100 motor really cares about having less "back pressure from the exhaust " .... when there is still the cat between ....

There is still less restriction and more flow regardless of the cat being there. The ecu will compensate in open loop. Not so much in closed loop. The diffrence is not great but yes there is a diffrence and the air fuel ratio will change. Its much more prevalent with no restrictive cat and a after market air filter which will really open it up and make the bike run lean in which case you would need the fuel processor.

Anyways.... I'm loving the new setup. All of this conversation is over my head, bike is performing great even if the mod was necessary or not. Here's a new photo. If anyone is interested in seeing.. I also, just got done installing the fender eliminator kit and some new rear turn signals.

Lookin sharp!

agreed ! very simple and clean !

What about video, you can't hear pictures!

Thanks guys !! Yup, I like clean simple lines. Hikertoo, i'll get some video for you. Just give me a lil time.