Co setting and the emperor's new clothes
 

OK, let me start by admitting I have no idea how fuel injection works apart from reading something online 10 minutes ago, where I discovered that open loop and closed loop have nothing to do with froot loops.

I just went for a 40 mile ride, and paid close attention to this "surging" I'd heard about. The only thing I could notice was an on/off feeling once every second or two holding 25mph in 2nd gear. Anywhere else, I couldn't notice any issue at all.

Halfway through the ride I pulled over and started pushing buttons until I got to the Co1 setting, which was at 15. Having no idea what this setting really affects, I set it to 20 and headed for home.

I hoped it would get rid of the 2nd gear, 25mph issue (which isn't really an issue as I had to look for it), but it didn't. However, for a start the bike seemed a little louder. More growly. GRRRRR! :D

Also, 3rd gear normal acceleration seemed a bit swifter. And certainly more growly. GRRRR!! :D

Confused by what I thought I was seeing, I pulled over and reset the Co1 to 15. I *think* it seemed to go back to it's slightly milder self.

So I'm confused. I don't think the Co1 setting does much under normal riding, but it seemed to me it was like adding a sports exhaust, new air filter and power commander all in one.

Is this totally a case of the emperor's new clothes. Did I imagine it all?

:D

I have just finished playing around with mine as well, but other mods also. Maybe try and leave the setting up for longer, then go back and see the difference. I too was having surge issues around the 50km mark, but the bike will now sit comfortably in 4th and chug along. I have removed the dB killers from my pipes, so don't need any attention from the men in blue from a spluttering bike. But it really does make a difference.

Doh!!

Welcome to :660:

Still not sure the CO setting does anything one the 2009 model. I upped it to 25 today (up 10) and I'm not convinced it's any different. The crap fuelling at 25mph is no different. I still think it might be better at acceleration but I really don't know. I think this bike is fine from the showroom and all tinkering is in the head!

:catfight:

:D

Some are ok from day one, so it's not a rarity that you might have a faultless result. The O2 sensor makes it harder for the CO2 settings to work, that's for sure.

You need to control the close & open loop fuelling with an O2 controller + a fuel mod to get the best ride.

The CO1 only adjusts the A/F ratio at idle & just off idle.