Get TUNED

[fasterfaster]

Cam a point to consider is a decent wideband will set you back $500 +
You should be able to get a custom fuel map built for a pc for half that price. At the end of the day any adjustment without a means of before and after fuel readings is simply a guess and nothing more. Without a fuel reading you might as well take pot luck and download of the net ............. same hit n miss factor.

[Crowda]

I agree with above, like i said earlier o2 carn't do much to adjust system by itself.
On a system without an o2 sensor your ecu does what it's programmed to do by preset data that's it.

On a system with an o2 sensor ecu is still working within those same pre programmed parameter's it's just that there is extra one's to allow it to give/trim some fuel in open loop if it see's it's not at optimum air/fuel ratio.

As for there being too many input sensors on fuel injection just remember it's adjusting every second for conditions so it kinda needs a bit of info to help

And Cam, biggest question you should ask yourself is this, what do you want to do with the bike (i.e daily ride etc) and what do you expect from it, i.e drivabillity/economy/out right power. From there plenty of people around here from what i see to point you in right dirrection.

[Cam]

Economy isn't much of a concern so it's a combination of power & driveability that are important. I'm happy to forego the latter for a slight improve on the former which is what I've done by going to 4 into 2 into 1
Either way though, it's a ton of fun to ride & the best bike I've ever owned. She's a keeper for sure.

When it get dynoed, (which it has been) don't they take O2 measurements & use those to build the map custom map on the PC3? If so then I guess all is as good as it can get, (within reason).

One last question, do you think the post 99er's are smoother or in any way better because they came from the factory with an O2?

Thanx heaps ya' all for your thoughts & advice, much appreciated.

[Crowda]

Economy isn't much of a concern so it's a combination of power & driveability that are important. I'm happy to forego the latter for a slight improve on the former which is what I've done by going to 4 into 2 into 1
Either way though, it's a ton of fun to ride & the best bike I've ever owned. She's a keeper for sure.

When it get dynoed, (which it has been) don't they take O2 measurements & use those to build the map custom map on the PC3? If so then I guess all is as good as it can get, (within reason).

One last question, do you think the post 99er's are smoother or in any way better because they came from the factory with an O2?

Thanx heaps ya' all for your thoughts & advice, much appreciated.

Yes if you had it tuned then they most definatly should of checked the exhaust level's to tune it right for pc3.
I have 99 as well and actually went away from the 4-2-1 yoshi system back to dual yoshi's on stock header's because riding my mate's 99 back to back with my bike he's was just bit punchier down low, however single was tad better up top, really noticed it doing wheelie's was just smoother and floated better with single. Now i have a gi-pro on and think it'd been enough to counter that loss, and it was never tuned still isn't because i keep putting off cam swap.

As for o2 i carn't say, only gen 2's have them but they have totally different butterfly/injector set up plus the exhaust valve so hard to compare. One i test rode was smooth almost felt bit flat down low to 99 but was a very nice bike to ride, worth 10 grand to up grade for small performance gain? that's up to individual i guess. Keep 99 and have new one now i'm up for that.