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Old 02-03-2013, 11:54 PM   #1
hjl47
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05 R6 running rough. help please!

bikes been running rough the last few rides. Instead of the I4 purr, it sounds like it burps and farts like a twin. this only happens intermittently. It will fart and pop and be down on power and then go back to normal. this happens in all gears and at all rpm range. any ideas?

I park my bike inside my apartment and had some tile work done, so it was quite dusty in my apartment when demo'ing the old tile. could some dust have gotten into the airbox and created this problem?

I know this is not too much information but if anyone knows off hand what it might be, any help would be appreciated.
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Old 02-04-2013, 12:00 AM   #2
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May be the regulator/rectifier going bad?
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Old 02-04-2013, 12:35 AM   #3
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Regulator/Rectifier is possible like ^ said.

If it's making a V-Twin sound that means you're intermittently firing on all cylinders, so maybe your Ignition Coils are bad or maybe a connection issue there?
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Old 02-04-2013, 12:52 AM   #4
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Quote:
Originally Posted by Reduxalicious View Post
Regulator/Rectifier is possible like ^ said.

If it's making a V-Twin sound that means you're intermittently firing on all cylinders, so maybe your Ignition Coils are bad or maybe a connection issue there?
Thats exactly what it is, i had the same problem last year, and i changed my ignition coils...problem solved.. you can buy them at www.parkshark.com or get the from ebay, but i would CHANGE THOSE FIRST, then go from there. Since i changed mine, problem went away.
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Old 02-04-2013, 01:00 AM   #5
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yeah ignition coils.. ive had this problem before on my 04 r6 as well. sounded just like you said.. i think they are notorious for this problem
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Old 02-04-2013, 11:32 AM   #6
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nice!! thanks for the input guys. ignition coils will be the first thing to check.
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Old 02-04-2013, 11:34 AM   #7
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its totalled sell it to me for a dollar.
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Old 02-04-2013, 11:37 AM   #8
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Power commander installed?
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Old 02-04-2013, 01:45 PM   #9
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no PC. this bike is cdill's old r6.

only mod is a gytr shorty pipe for the newer r6's welded on. dont remember what he did for mods but that is the only obvious one. other than suspension. and its geared down one tooth in the front. but that wouldnt make a difference as far as my problem is concerned.

and the last time i rode it i did smell something burning. the ignition coils are likely burning up, so that is definitely the first thing i will check.

any recommendations on how to get to them? just take off tank, airbox and start wrenching?
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Old 02-04-2013, 08:55 PM   #10
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Remove the tank and airbox.
Unplug the connectors and pull the coil packs out of the valve cover plug well.
Inspect the coil packs for signs of them burning/arcing to the cylinder head; burnt spots or bluish hard spots on the rubber insulator.
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Old 02-04-2013, 09:03 PM   #11
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I just had an arching ignition coil a couple of weeks ago.

To see if it is the ignition coil or electrical, here is an easy way by feeling the headers: start with the moto cold and run it for 15 seconds or so. CAREFULLY touch each header...the one that you can leave your hand on the longest is the one that is not firing. (Thank Bruce/Tiller for this helpful and easy tip!)

Did this for real and diagnosed it as the second one from the left. Ignition coil pulled and low and behold, arching issue. Replaced it and it's all good again. :-)

If you find that it is an arched ignition coil and are on a time issue and want to replace it quickly , I have an extra coil I could trade for parts. :-D (I should mention that my bike is also an 05 R6!)

Last edited by myla296; 02-04-2013 at 09:06 PM.
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Old 02-04-2013, 10:03 PM   #12
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An easier way is to spray each header with a liquid like Windex. The one runnig poorly will take a bit longer to evaporate.
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Old 02-04-2013, 10:10 PM   #13
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yeah, def change them when the bike is cold. the coils on the ends are the tough one's but you should be ok.
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Old 02-04-2013, 10:43 PM   #14
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fouled plugs? checked the gap on them recently? bad gas? its usually the obvious one that is the culprit.

i was freakin just yesterday after startin up the bike for the first time in about 1.5 weeks it was dying like crazy and i had to manually twist the accel while firing the engine cause i had some bad gas.
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Old 02-04-2013, 11:43 PM   #15
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awesome. thanks for all the input. so im guessing i just need to replace the coils that are bad? i was planning on replacing all four, as well as all spark plugs. the plugs I will still likely do, but I guess I will only replace the coil(s) that are bad.
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Old 02-04-2013, 11:44 PM   #16
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yeah, if it aint broke dont fix it, you might even pay to get a diag done then fix it yourself once you know exactly whats wrong.
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Old 02-07-2013, 08:16 PM   #17
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All you need to do is start it at night and look up under your tank in the top front of the motor and if any of the coils are bad you'll see some arching going on, pretty easy check and usually works quite well, at night in the dark of course!

Check with the dealer, give them the vin #, there was a recall on those bikes, can't remember the years or years but right around 03-05. They'll check the vin and if it hasn't been done they'll replace all 4 at no charge. I believe there is also a front sprocket lock washer or nut recall that they'll also change for no charge.

Call a Yamaha dealer, might save you quite a bit of cash!

Good luck.............
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Old 02-09-2013, 04:22 PM   #18
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^ nice. thats a good tip for the recall. thanks
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