When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I recently purchased a 2001 FLHT from my brother. He bought it new. The air cleaner is stock and original and in need of a new one. The bike is bone stock. Would i benefit from a K&N filter (HD-1499) or should I go back with a stock one? Dealer said the k&N could cause the bike to run lean.
Changing the filter alone will not make it run "lean"; to the extent that the filter will be cleaner and will then get the appropriate volume of air and run as designed.
Whether you get a K&N or the SE (Stage 1) filter, from HD is a matter of personal preference.
If you get a Stage 1 Filter Kit (filter and backer plate), it will run more lean because the motor will get an additional volume of air. This is a good thing and your bike will thank you for it.
Changing the filter alone will not make it run "lean"; to the extent that the filter will be cleaner and will then get the appropriate volume of air and run as designed.
Whether you get a K&N or the SE (Stage 1) filter, from HD is a matter of personal preference.
If you get a Stage 1 Filter Kit (filter and backer plate), it will run more lean because the motor will get an additional volume of air. This is a good thing and your bike will thank you for it.
Let me ask the question a different way. if i plan to keep my bike stock would it do any good to use a K&N filter over stock. $22 bucks vs $75?
Mine is - If you're not doing anything else to the bike and you want to keep it completely stock otherwise, just replace the stock filter.
If you go with higher flow filter and no other changes, you probably won't notice any difference in the way the bikes runs. What you will notice is a significant increase in induction noise. That additional noise might make you think it's running better/faster, but it's simply an illusion created by being louder.
As far as leaning out the motor goes, I don't have enough knowledge/experience with the intricacies of the ECM and factory 02 sensors to positively answer that question. You'll get people telling you either. Most of those responses will be based on heresay as I'd bet a million bucks that very few of those responding have ever tested to see what that configuration actually does to the AFR. Those who actually tune bikes on a regular basis may be the exception, but even there you have good tuners and not so good tuners.
Let me ask the question a different way. if i plan to keep my bike stock would it do any good to use a K&N filter over stock. $22 bucks vs $75?
No, and actually the stock paper filter is a better filter (as far as how much dirt it traps)....k&n filters breathe better but as a by product they let more particles pass through...
Just put the stock one on. If you aren't going any farther than that, just leave it stock. If you plan on upgrading stuff than get the Arlen Ness big sucker now.
Last edited by Indianspringsaz; Nov 9, 2011 at 02:04 PM.
noserider, I haven't yet heard anyone adress the fact that the K&N is a lifetime, washable, reuseable filter, if you plan on keeping the bike it may pay off in the long run, and you might clean it more often than you would if you were paying for new paper filters. Ask your dealer if his Screaming Eagle filters will make your bike run lean also.
Let me ask the question a different way. if i plan to keep my bike stock would it do any good to use a K&N filter over stock. $22 bucks vs $75?
Well, I've read the comments and those that suggest you stay stock are very valid. If that is your choice, or you could just simply clean the existing filter.
Those folks that reference O2 Sensors (your bike does not have a catalytic convertor) and ECM recalibrations (I don't believe your bike is fuel injected), and strange sucking sounds... those comments are a different matter.
Personally, I would go with the Stage 1 kit. It costs a little more, but the additional available combustion air will make your bike run MUCH, MUCH better. And it will take you all of 30 minutes to complete.
At the end of the day, it is your choice - and that is a good thing!
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.