Another member just recently posted on the Big Sucker Air Cleaner. I have a more basic question. My right knee hits the stock air cleaner on my Nightster. I have mid controls. I would like to change the air filter to something a bit smaller, or shaped differently (round perhaps?), without giving up performance. Any ideas? Even perhaps something with a different shape with better airflow/performance.

I was at a used bike shop on Sunday, and saw an older Sportster with a chrome, round air filter. I was particularly excited with the way it looked, but I was much more comfortable sitting on the bike without my right knee hitting the filter.

Any advice will be helpful. Thanks.

 

I put a Ness 8" round cover on my Big Sucker 2 air cleaner, doesn't bother my knee.

http://www.denniskirk.com/jsp/produc...fCatId=&mmyId=

 

Joker Machine makes some small and great looking intakes:



http://www.jokermachine.com/itemstre...&Placeholder=0

 

Thank you. Very helpful. Both the Ness cover and the Joker Machine look better than stock.

Can you simply replace the stock filter with the Big Sucker 2 without making any other changes to the bike? Does the Big Sucker 2 increase performance?

 

Thats because you have forward controls and not mids.

A BS II won't give you more performance than the BS I unless you've done a stage 3 or more to your motor. Your carb is only going to suck so many CFM.

 

Another question - the Jokermachine in the photo above doesn't have a cover. Is there a problem with water getting into the intake in the rain if the airfilter doesn't have an outside cover?

 

You just need to get a rain sock. I run my air intake open, and just through the rain sock on when it is raining really heavy

 

Ok -this is a lot of good info.
What is a "rain sock"? I don't think I've ever seen one.

 

http://www.jpcycles.com/search/searc...tk=All&x=0&y=0

Stretchy little water repelling thing that goes around the open air intake

 

I read somewhere on the forums a guy with a JM filter says he lost some power. They're small though so if you don't mind a few hp...