K&N Air Filter & R6 - TwoWheelForum: Motorcycle and Sportbike forums
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post #1 of 31 (permalink) Old 07-16-2005, 08:02 PM Thread Starter
 
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K&N Air Filter & R6

So I find out today after I spend $80 on a new K&N high air flow filter that without rejetting it is a waste of time.. finish up the bike, clean the chain and take it for a ride.. I get out on 8 mile and hit it the thing hesitates like a mfr and then goes.. ok maybe it is cold or maybe because I had the gas tank off it there was a gap.. so I ride around and let it warm up.. same thing.. off the line in first gear it feels like it is being held back like it is running on 3 plugs or something and then around 40-50 mph it takes off.. I go back to the Twistified garage and say the forks are great and the bike starts right up but it hesitates big time - someone tells me it is the filter for sure that without rejetting it is no good.. I had asked the guy at the dealer for a stock filter and he said no the K&N is the same price so why go stock because K&N is much better and he has one in his 01 GSXR 600 and it is great, etc. I am tempted to clean off the stock filter or go buy a stock filter and put it back in and return the K&N.. I am going to the track 2 days next week so I will see how it goes, I am hoping it isn't too shiiity.. Just wanted to mention it in case anyone else with an R6 is considering the change without rejetting - don't do it..
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post #2 of 31 (permalink) Old 07-16-2005, 08:22 PM
 
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interesting you post this MP...My friend with a 04 R6 is haveing a world of problems right now. Over the winter he did upgrades like no other. PCIII power comander, brake upgrades, V-stacks, slide stops, BMC race filter, speedo healer, igintion inhancer, micron slip on......the list goes on., he made the mistake of doing all this at on time during the winter and now has a world ? problem with it bucking. When he explains the problem to me it sounds like a air fuel mixture problem. He was using other people's maps, and tried his own custom maps...still didn't fix the problem. He took his R6 into the shop to have a custom map professionally done, and they worked on this thing all day, still couldn't get right. Also the shop says they don't see anything wrong with his work. He thinks he has a bad Power Commander, but I don't really think that is the case. I may suggest to him to try and put the stock air filter in just to see if it makes a difference. I am including pics of his before and after dyno runs.

Edit>>I just suggested takeing his BMC filter out and putting his OEM back in. He said he will try this tomorrow., however he took his power commander out and attempted to run it with out the power commander. He rode about 35 miles and had no problems. He said it ran a little hotter than normal but still well with in range. The rev wasn't as high, but other than that he said it seems to run ok. So he is going to send the power commander in and hopefully they will replace it.
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Last edited by R1up0n1; 07-16-2005 at 09:19 PM.
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post #3 of 31 (permalink) Old 07-16-2005, 08:31 PM
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That just sounds wrong.
I would put the old (cleaned off) filter back in just for a reference.
If it helps, I would defiantly return the K&N and get a stock filter.

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post #4 of 31 (permalink) Old 07-16-2005, 08:54 PM Thread Starter
 
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yeah I am going to clean it up and bring it to the track.. if it runs like shiiit then during lunch I will change it out and try the stock back in there.. my bike is ready for the track i don't want to mess with it now.. maybe it will be ok.. i have heard nothing but good about K&N until now..
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post #5 of 31 (permalink) Old 07-16-2005, 09:00 PM
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The bike may just need to learn what's it has.
Try disconnecting the battery to reset the ecm.
This should force it to learn the new set up.

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post #6 of 31 (permalink) Old 07-16-2005, 09:09 PM
 
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Quote:
Originally Posted by jeeps84
The bike may just need to learn what's it has.
Try disconnecting the battery to reset the ecm.
This should force it to learn the new set up.
That is a very good tip. My Hemi Ram has to learn every add on put on it, For one and most common is the Air intake systems. The ECM has to relearn the new filter. It is all about mixture. your A/F is reading different and a lot has to happen to rethink the air fuel mix. Right now it might be a little lean or flat on bottom. But it may pick up with some riding. If it dont check your plugs for an idea of your mixture. Or go back to stock. Its only a couple of HP that you dont feel anyway.
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post #7 of 31 (permalink) Old 07-16-2005, 09:40 PM
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+ a new K&N will be full of wet oil that will actually limit the air flow for the first 100 miles or so.
I just remembered that.

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post #8 of 31 (permalink) Old 07-16-2005, 10:08 PM Thread Starter
 
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i will definately try that.. that's for the tip.. unplugging the battery can easily be done quickly in the morning for a minute and then replug in.. that would be awesome if it was an easy fix like that, etc. also didn't think about the new oil on it, etc... i really hope it is one or both so I can just leave it alone.. i really don't want to work on the bike anymore this year.. i have done more work to it today then I have since I bought it.. i wasn't really looking for more power, although that never hurts, I just wanted to do the much needed maintenance and the air filter was near the top of the list with the fork fluid since neither was ever done.. the brake fluid was just a bonus because they bought a bleeder and some Motul brake fluid they said I could use..
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post #9 of 31 (permalink) Old 07-16-2005, 10:11 PM
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post #10 of 31 (permalink) Old 07-17-2005, 12:52 AM
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Hey guys... his R6 is carbed...not FI!!!

Not to throw a wrench in the idea but that's not the key. The problem is that his A/F ratio is JACKED now. With a slip on and a high flow air filter he has way too much air in there right now. Put the stock filter back in...make sure it goes back to normal. If it doesn't, I would suggest it is the plugs that you just put in. But I'm willing to bet it's the filter. Then if you don't plan on jetting it in the near future return the K&N for a nice new stock filter.




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post #11 of 31 (permalink) Old 07-17-2005, 02:48 AM
 
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post #12 of 31 (permalink) Old 07-17-2005, 05:06 AM
 
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Quote:
Originally Posted by Gas Man
Hey guys... his R6 is carbed...not FI!!!

Not to throw a wrench in the idea but that's not the key. The problem is that his A/F ratio is JACKED now. With a slip on and a high flow air filter he has way too much air in there right now. Put the stock filter back in...make sure it goes back to normal. If it doesn't, I would suggest it is the plugs that you just put in. But I'm willing to bet it's the filter. Then if you don't plan on jetting it in the near future return the K&N for a nice new stock filter.
No doubt about it.
The way the other post was I though he was EFI. But A/F mixture is Def the problem either way.
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post #13 of 31 (permalink) Old 07-17-2005, 06:17 AM
 
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bad part now is that you could be running way too lean which is a bad thing....put the oem filter back in asap...
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post #14 of 31 (permalink) Old 07-17-2005, 08:51 AM
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I forget some bike still have carbs.
Put the OEM filter back in.
Disconnecting the battery wont effect it at all.

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post #15 of 31 (permalink) Old 07-17-2005, 09:31 AM
 
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Jeeps you were right about the K&N oil issue. Thats why I use BMC. Much better than K&N and they race filters are warrentied to make power after you bike is tuned for them. Thats the diclaimer. AFTER IT IS TUNED!!!
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post #16 of 31 (permalink) Old 07-17-2005, 11:55 AM
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Quote:
Originally Posted by jeeps84
I forget some bike still have carbs.
Put the OEM filter back in.
Disconnecting the battery wont effect it at all.
We'll let it slide this once!! But next time!




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post #17 of 31 (permalink) Old 07-17-2005, 03:26 PM Thread Starter
 
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Quote:
Originally Posted by jeeps84
I forget some bike still have carbs.
Put the OEM filter back in.
Disconnecting the battery wont effect it at all.
damnit - i was hoping that was it.. now i have a filter change to do first thing thursday morning - or i can ride it out until lunch and see how it goes..
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post #18 of 31 (permalink) Old 07-17-2005, 10:15 PM
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If it's not running right on the street, don't try it on the track...you will either experience a worse hesitation that could put you in a very unsafe situation or if you try to "ride through it" you could be lean enough to pop your motor. If you don't have time to jet it properly, go with what you know is OK.

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post #19 of 31 (permalink) Old 07-17-2005, 10:43 PM
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Quote:
Originally Posted by larryg
If it's not running right on the street, don't try it on the track...you will either experience a worse hesitation that could put you in a very unsafe situation or if you try to "ride through it" you could be lean enough to pop your motor. If you don't have time to jet it properly, go with what you know is OK.

Larry
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post #20 of 31 (permalink) Old 07-18-2005, 11:48 AM Thread Starter
 
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what about taping up one side of the air intake to adjust the air/fuel mix? that would be a quick fix to see if that is the problem? problem is I can't test it on the street (at least not easily as the bike is at Dyno's like 40 miles away taped up on the trailer ready to go).. I am cleaning the stock filter as I was going to throw it back in early Thursday morning before the track day starts.. I should have time.. I was just thinking about taking a page out of the nascar book and taping it up on one side.....
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