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Discussion Starter · #1 ·
I drove my bike up to the lake two days ago, it drove fine on the way there. On the way back, the bike felt like it had no torque and was being held back. The higher pitched, clean sounding higher RPM revs that normally come out stay a deeper more baffled sound than the quick clean revving sound it should have. The bike shakes at really low RPMs like/when it is about to stall out, when before it would have no problem (ie very slow start in first, after letting out the clutch or from a low RPM 2nd gear "rolling stop" start). I've stalled it twice since the way back, and not once before this happened... so I'd say I've lost some significant torque or overall power (I haven't taken it in the higher RPMs since I don't know whats going on)

It also doesn't have that 5k RPM power boost it had before, it just slowly continues up. If I cruise around 5k then sometimes for a *split* second it will sound/feel normal and jump to the power it should have, but then back to the other sound/feel. Its hard to explain, I think the video says it better than I can. Let me know if you have any questions, but I'd really like to know whats going on. I got the bike 2-3 weeks ago. Let me know what to check/where to check/how to check/ whats going on?! THANKS!

Bike BEFORE, how it should be:
http://www.youtube.com/watch?v=erlXH-tUMqY

Bike NOW, sounds baffled, stays deeper, loss of power:
http://www.youtube.com/watch?v=3-gMeFeO8iM

Thanks for all your help!!
 

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I drove my bike up to the lake two days ago, it drove fine on the way there. On the way back, the bike felt like it had no torque and was being held back. The higher pitched, clean sounding higher RPM revs that normally come out stay a deeper more baffled sound than the quick clean revving sound it should have. The bike shakes at really low RPMs like/when it is about to stall out, when before it would have no problem (ie very slow start in first, after letting out the clutch or from a low RPM 2nd gear "rolling stop" start). I've stalled it twice since the way back, and not once before this happened... so I'd say I've lost some significant torque or overall power (I haven't taken it in the higher RPMs since I don't know whats going on)

It also doesn't have that 5k RPM power boost it had before, it just slowly continues up. If I cruise around 5k then sometimes for a *split* second it will sound/feel normal and jump to the power it should have, but then back to the other sound/feel. Its hard to explain, I think the video says it better than I can. Let me know if you have any questions, but I'd really like to know whats going on. I got the bike 2-3 weeks ago. Let me know what to check/where to check/how to check/ whats going on?! THANKS!

Bike BEFORE, how it should be:
http://www.youtube.com/watch?v=erlXH-tUMqY

Bike NOW, sounds baffled, stays deeper, loss of power:
http://www.youtube.com/watch?v=3-gMeFeO8iM

Thanks for all your help!!
Hey,
I had a similar issue, but mine happen actually when I went to the yamaha dealer. What happened was the ex-up valve was getting stuck (so Yamaha said!) and was not opening all of the way. Are you getting any error codes?
 

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I have the same issue right now - especially noted by the "rolling" sound in the exhaust. I don't know what it is, but I doubt EXUP has anything to do with it - as I recall, 06 was the first year that the R6 had EXUP, you're is 05, correct?

I'll be searching for a solution as well. May be helpful to know, mine seemed to have started after I ran her empty one night, I had to push to a station. Got gas, then about 50 or 60km into that tank of gas, it started.

I'm hoping it's not the plugs cause I just replaced them 3 weeks ago.
 

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sounds like you got a dead cylinder. start it up let it run for a min or so and touch the exuast headers, see if one is cold or not as hot as the others. id so then you got a dead cylinder. sould be loss of compression (hope thats not it) fouled pluggs, plugged injector, i also worked with a former yamaha race team tech and he said that the coils sometimes burn a whole in them and will ground out causing a simmilar proplem. about the exup valve the 05 wont have it the 03-05/06-08 r6s wont have them
 

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Discussion Starter · #7 ·
Yes, this is an 05. I'm going to try what hullbrose said, checking for a cooler header. I'm thinking its an ignition coil, spark plug, or clogged injector. I really hope its nothing more serious than that, I just got the bike 2 weeks ago and really don't want to put it in the shop.

Will running the bike cause any harm to it? I'm not riding it anymore, but just wondering whats going on in there if one of these is the case.

I'll let you know what I come up with, and thanks again for all your help.

EDIT: And there are no error codes or the bike indicating somethings wrong other than just what its doing
 

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running the bike shouldnt hurt much but just foul the plug realy bad, also forgot to ask does the bike clear up at a high rpm? also check to make sure your injector(s) are plugged in all the way but thats if you have a dead cylinder, changing your plugs wouldnt hurt eather, replace them with ones that came in it. try that tell me how it goes if none of that works i can try and think of some more ideas. btw im a tech but mainly do lots of dirtbikes case of the area i live in
 

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Discussion Starter · #10 ·
Hey... just an update. I got to the plugs and was going to replace them, but I just found out no one has the NGK CR10EKs around here, so I had to order them. They will be here in the morning. I am going to replace those and see how she runs.

Where are the ignition coils? I haven't gotten too deep into the service manual yet, but if its much more complicated then I think it may be out of my range. Got the plugs out so I've got the wires leading to them but have no idea where they go. I'm pretty good at stuff like this but all this is so compact! Its hard to get to things. Without a how-to I don't know that I would really want to do that. Same with the injectors. Like I said I'm gonna have to go over the service manual a lot more, but any additional info or how-to's that I haven't found would be appreciated.

I'll let you know if the new plugs fix anything.
 

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Discussion Starter · #12 ·
I got 4 new plugs and put those in, the bike ran great. I took it out for a quick spin and everything seemed to be working fine, but I was cut short because a bad storm is coming in. Back in my neighborhood the bike started getting 'jumpy' like it did before. It does that power boost at 5k RPMs again, and it sounds like its normal again. It definitely has more power, and will pull out from low RPMs but I think it maybe has a little less than it did before. I'll get back out on it when the storm passes and see how it does, but does anyone have any ideas?
 

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i would have inspected the coils see if any of them had wholes in them were they could be arcing if its still doing it then it sounds like a coil issue. start the bike up and if it sounds like it did before touch the exhasut pipe see if ones cold still. if you find one then id rev the bike up to 5k or so and hold it there for a 5-10 secounds then check that same pipe and if its warm/hot then you got some kind of eather coil or fuel issue with that cylinder.
 

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Discussion Starter · #14 ·
Hey, I took the bike out for a spin yesterday. Everything feels a lot better and sounds a lot better, and it has a lot more power than it did before. The only thing is now it is idling a bit rough, and may still be slightly down on power. I gapped the plugs within range with a feeler gauge so I don't think its improper gapping. Sometimes when I accelerate it gets a bit jumpy and makes a bit of a popping sound when it jumps, but the new spark plugs definitely made a huge difference and the bike is ride-able now. I took a video of it now:

http://www.youtube.com/watch?v=EVPKAELs4pY

Are the coils on these the things that are directly on top of the spark plug? And when you say check for holes do you mean in the entire thing? Like all around the black cylinder shape or somewhere in particular? Also when I start the bike cold it idles a little higher and stays there, not jumping, then after it gets warm it starts doing that. I check all the headers with a temperature probe and they are all pretty much the same.

Thanks again for your help.
 
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