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post #1 of 4 (permalink) Old Jun 28th, 2010, 1:48 pm Thread Starter
Join Date: May 2010
Location: Spokane, Wash, USA
Posts: 2

Just wondering, have '04 GT with only 3400 miles on it (and loving it!!). Any advantage to replacing stock air filter with a K&N filter? If I do, will sensor automatically recalibrate? Also, ideas on better spark plugs than stock?
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post #2 of 4 (permalink) Old Jun 28th, 2010, 3:52 pm
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Location: Burton, British Columbia, Canada
Posts: 1,756
No advantage on performance....and from what I have seen from others,the BIG disadvantage of finding fine dust/dirt at the bottom of the air box. Also the PITA of removing plastic and tank to maintain it.
The OEM can easily go well past the recommended milleage for replacement, depending on riding conditions. What I have done on my bike is screening the air intake, I am not finding bugs and dirt on top of the filter anymore, and my filter still looks like new and is well past its "recommended "replacement.

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post #3 of 4 (permalink) Old Jun 28th, 2010, 8:15 pm
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Location: Mendocino, CA, USA
Posts: 283
I have a K&N and go back and forth whether I use it or not. The bike is a tad more responsive in some areas of the power curve, but then again, it is also more sensitive to throttle management because it seems to be running leaner. I prefer stock filter, and it is easier to remove and replace, but I live a ways from my dealer, so it is sometimes more convenient to clean and reinstall the K&N. Have not had any issues with stuff downstream. I have the Rhinewest cam gear and chip kit. The K&N tends to negate some of the benefits of the Rhinewest chip, though I have not experienced backfiring like some guys have with this combination. But Pirate's Lair and Rhinewest both recommend the stock filter as I understand. Again, I prefer the stock air filter, especially for smoother throttle control in the twisties. So, it is not a real world performance enhancement. A new chip is a way better investment for that, way better than an aftermarket exhaust, too.

Jim Douglas
'00 K1200RS >135,000 mi, '09 K1300S sold @ 22,232 mi
'93 K1100RS traded up @ 78,000 mi, '85 K100RS sold @44,000 mi, Kawi 650 track bike - sold
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post #4 of 4 (permalink) Old Jun 29th, 2010, 1:51 pm
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Location: Newnan, GA, USA
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I think the advice on leaving it be is good advice unless you want to get really good at pulling the tank to service the K&N. I don't have anything against the K&N filter, just the PIA factor of getting to it on the GT.

The last thing you'd want to do is put a K&N in there and then get lazy about maintaining it due to the hassle.

Just my $0.02 worth.

04 K1200GT
09 HD Superglide Custom
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