+1 on taking it to a qualified dealer. Could end up costing less than more parts. Make sure they've got a Gold certified tech and also an EGA machine. Without at least the EGA they would just be guessing too. They also have great technical assistance from Yamaha that's just a phone call away.

Man, you guys are RIGHT ON.
I read some other posts on carb, FI cleaners on the web. I was leaning to a product called Lucas upper cylinder lubricant and injector cleaner. One 5.25 fl oz. bottle treats 25 gallons of fuel. They are normally 7 bucks, but they were on sale 2 for 8 bucks at auto zone! I dumped some in my almost full tank, rode it 90 miles at 75-80 MPH on the highway tonight. I didn't get a chance to do any 55 MPH roads, so I'll ride it to Cheney tomorrow morning and we'll see how she likes it.
I did notice it was idleing better and was easier to drive in town, not so jerky.
I'll still keep my SeaFoam treatments up, but this Lucas stuff seemed to clean out my injectors. I don't think the PO used any additives, so we're a little behind, and probably a bit dirty inside.

I'm startin to think all this bike needs is a cosmetically nicer air breather, and a set of true duals (I just GOTTA have some.) Naturally it will be repainted this winter and some other bling added.

Thanks for all the replies, hopefully we're past the fouling problem. These are great bikes and this is a fine forum.

If FI didn't show up on the Roadie until '07 I doubt if I'll be able to afford a Fuelie model. But after my experience with the BMW K75 and now the CB I would opt for an injected machine if I had the option. The improvement in cold start, fuel mixture management and all round divisibility are clear. I have noticed that both the Beemer and the CB did show a bit of sensitivity at low speed and on the CB I've either just gotten used to it or the system is actually adaptive because it is almost un-noticeable to me now.

BuffaloRider wrote:
If FI didn't show up on the Roadie until '07 I doubt if I'll be able to afford a Fuelie model. But after my experience with the BMW K75 and now the CB I would opt for an injected machine if I had the option. The improvement in cold start, fuel mixture management and all round divisibility are clear. I have noticed that both the Beemer and the CB did show a bit of sensitivity at low speed and on the CB I've either just gotten used to it or the system is actually adaptive because it is almost un-noticeable to me now.

+1 on this. after 7k miles on my 08 roadie, it would be hard for me to go back to a carbed bike. hit the starter button she fires right up and idles perfect. my wife's vstar 650 is a cold natured carbed beast even in hot weather. last saturday i got her bike out to wash and detail. afterwards, i took it for a 30 minute ride around the block. it took over 5 minutes to warm up and idle properly. nothing wrong with it, its just how it is. worse on cold winter days, or humid summer days. my engine is stock, only thing i've added was cobra pipes on it.

Well, after 2 days reading on the RSwarrior forum, and one posting, I learned lots about Fuel Injectors. In one post i read, they said low battery could give you some trouble. I asked when I bought it, "how's the battery?" They said, "it's fully charged". I should have had my NAPA friend test it, 2 months ago, right after I bought it. It started the bike fine, no drag, no hesitation.
This morning I had him bring his tester out, and it said "Replace Battery" it had 2 out of 10 lines for power.

I called Bobz Bikz where I bought it, to see if they had a battery. They were out of stock, but would have one by next Thursday. That was too far away, I want to ride this weekend (Labor Day!!)
Allpack battery in Wichita had one. I did some computer work for Bob, the owner of Bobz Bikz, and had a little store credit. Bob called Allpack and paid for my battery on his credit card so I wouldn't be out of pocket. I rode from McPherson to Wichita on a 3/4 dead battery, but I made it, and changed it out in their parking lot, took 5 minutes.

Now for the GOOD part. I don't know if any of you have ever ridden in Wichita during rush hour, on a Friday... Holiday weekend to boot... it sucks! I had one idiot talking on his phone, change lanes on me, and gave me a dirty look for being there!!

It's 103° outside right now, I'll take another ride tonight and hopefully my injector is getting the juice it needs, so it gives my engine the fuel IT needs.

I removed my tank to get access to my fuel injectors and see what it was going take to remove them. As I moved several bundles of wires around, I spied an open Vacuum port on top of my intake, with a short piece of tubing still on it.
Further investigation revealed the missing hose was attached to the "Intake Air Pressure Sensor". It looked like it got yanked off. I probably did it when I removed the AIS. I'm trying to not be heavy handed, but I get in a hurry sometimes.
After replacing the hose with a new piece, I took it on a short 45 mile ride, in the cool Kansas evening air. I rode 10 of those miles at 55-60 in 5th gear. Pretty low rpm's for 5th, but it did it OK. I had a Deputy Sheriff spin around on the highway, and follow me from Conway to Inman, so 55 was important.

Hopefully this will solve my fouled plug problem. Time will tell, I take her out tomorrow and run a tankful through her.

some times with fuel injection it takes a while for the computer to see the change and sort itself out , here's hoping

That missing hose would have made a huge difference. After reattaching the hose the change in mixture would have been immediate. The computer reaction is immediate when a sensor input is changed.

That should have caused overfueling on both cylinders though. Keep us posted.

If my customer who was supposed to show up at 9:00 doesn't get here by noon, I'm going riding to see how she runs. I too would think both cylinders would be effected, but only the rear ones were fouling. I'm glad I'm learning about FI, and about my new bike. I'm into my 3rd month of owning it, and I've managed to log up 6000+ miles already, I'm almost due for tires. The dealer put a half worn out Bridgestone on the front and a Dunlop Harley tire on the back. I'm going with Michelin Commander II's

Fault code No - 14
• Intake air pressure sensor hose is detached, clogged, kinked, or pinched.
• Malfunction of the intake air pressure sensor in the intermediate electrical potential.
• Malfunction in ECU.
Diagnostic Code No - d:04

Yep, That's right folks, that hose,.... No... THE HOSE, from the Vacuum port directly on top of the Intake manifold, to the "Intake Air Pressure sender", had heated and slowly split then disintegrated. It was conveniently under several bundles of wire, and very hard to see. I found the broken off piece and assume the hose had over time deteriorated until it split, which would account for my air leak, hence fouled plugs. As the hose split got worse, as the leak got worse, the plugs fouled sooner. When it finally fell off, I had no signal to the Sensor, so no adjustments to the injector, causing really rough idle and it only ran good at high speeds.

I've gone 288 miles since I replaced my old line with some HI-Temp Silicone Vacuum Tubing from NAPA. I'm here to tell ya, with all the injector cleaners and sea foam I've been running in my Roadie since I bought it, now that it's running right again, I'm getting 46 MPG, and its very responsive!

To ALL the FI guys, and anyone who cares, these engines run pretty warm, get rid of the plain jane vacuum line and replace it with some silicone vacuum tubing.

Thanks to everyone who stuck with me through this, I not only learned a lot about my bike, I cleaned and checked a bunch of other stuff thanks to you guys suggestions.