I have not riden my bike in about 8 months (03 R6) due to a deployment to Iraq, however my wife has been starting it for me every week and letting it run for about 20 minutes. I went for a ride the other day, about 1 hr 1/2, and everything was fine at first. When it came to an end, I was down shifting (I had been going up and down the gears the whole ride) and when I went into first and came to a stop it began to "peder" sounding like it was gonna stall out. I filled up with gas before I left so I knew that was not the problem. For the rest of the ride until I got home evertime I was in first gear and some times even second it sounded like it was fighting to stay running. I dont remember what a standard idol RPM is but right now I am barley at 1K RPM. I started it again the next day just to see if it was still happening. I let run for a bit and even still it sits in neutral and sounds like its gonna stall out but it doesnt. I know in the past no matter how long I let it run it maintaned an constant sound. Now it jumps up and down like it is trying to catch itself. Hope this make sense and even more I hope it is something stupid so I fix it easily. Please help me if you can. :|

It sounds like you have some fouled up spark plugs. After sitting for a while, even though your wife has been starting it and letting it run, will develop ridges of carbon and other material deposits on the electrode of the spark plug.

Or possibly a little bit of gunk has gotten uin a fuel injector. At high rpm, and subsequently higher fuel flow, the injector is able to push enough fuel. But at lower rpm where mixture is critical because you are barely getting enougfh fuel to run, being shorter can be noticeable.

Try some fuel injector cleaner. You'll need to get a measuring cup to limit the amount you put in your tank. Generally one of those little 12 or 16 oz bottles is good for 20 gallons of gas, so you'll need to limit down to 3 or 4 oz to a for tank on the bike.

If that doens't work, you can try to pull the plugs and see how they look. In any Haynes manual, auto or bike, there is a colorful chart to help read spark plugs and see their health.

Thanks alot, I will looking to both possiblities. One other thing I noticed and maybe this will futher your theory on my problem. I noticed today when I was riding in fourth gear, it felt like it had no balls, like it did wanna go for me. I would pull the throttle and get up to 85-90. When I would pull the throttle to go faster it was jumpy. I would get to 100-105 and the RPMs would go up but it was like hitting a govener on car it was so hesitant. Des this make sense? I will try the fuel injector cleaner first, then if nec. I will will attempt the spark plugs. Thanks a bunch! :thumbright:

That still sounds like either a fuel delivery problem or spark problem.

i had that problem with mine (not wanting to go and feeling like it was hitting a governer) and ill tell you what fixed it. i took the power commander off and the problem went right away. so maybe you need to get yours recalibrated if you have one.

It sounds as if you have bad spark somewhere. I had a very similar issue with my '03 R6 and it turned out to be a bad coil pack. From what I understand, the '03's were prone to these going after sometime.

A very simple test for you to do without even tearing into the bike is to make sure the engine is cold. I would even let it sit overnight, then start it up and let it run for about 30-60 seconds (enough to let the headers get warm). Then with your hand, test each header...the one that isn't hot/warm is the cylinder that's not getting spark! BINGO. Easy to test...but hard to get at.

Once you've determined what chamber isn't getting spark, it's just a matter of trial and error to see if it's the spark plug or the coil pack. You can swap either the coil pack or a spark plug to another cylinder, re-assemble everything and then try the test over again. Obviously if the problem moves with the bad component, you'll know what to replace. The good news is the parts aren't astronimical in price, but it's time consuming.

I would also recommend that you replace your spark plugs while you're down there anyway.....it's a bitch to get at just for those little guys so I'm sure you don't want to be doing it again in the near future. Also, don't go cheap on the plugs...the ones that Yamaha recommends (I think they are NGK if I remember correctly) will work the best and give you the longest life. They are a bit more expensive, but like I said, you don't want to be replacing these every 5,000 miles!

Hope this helps,

-Kevin-