BMC race vs BMC street vs DNA vs K&N
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Senior Member
Superstock
Joined: Dec 2005
Posts: 428
BMC race vs BMC street vs DNA vs K&N
I've heard mixed feelings on these filters. Obviously I want the highest flow possible. What is the best choice for my SH with stage one jetting and after market exhaust?
Seņor Miembro, Ay Caramba
SuperSport
Joined: May 2006
Posts: 562
From: a little north of DC
What type of jet kit? I believe it is tough to get one of those kits running well with a high-flow filter.
Also, are you running a full exhaust or slipons? The resulting top-end will be negligible with anything but a full exhaust.
Plus, high flow filters essentially move the power up in the powerband, so you'll lose a smidgen of the SHawk's bottom-end power. So it may not be worthwhile if you don't keep the bike revved high.
Also, are you running a full exhaust or slipons? The resulting top-end will be negligible with anything but a full exhaust.
Plus, high flow filters essentially move the power up in the powerband, so you'll lose a smidgen of the SHawk's bottom-end power. So it may not be worthwhile if you don't keep the bike revved high.
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SuperBike
Joined: Nov 2005
Posts: 1,011
whichever filter you get the jetting has to be changed and likely the needle position as well. I have the k&N and it took awhile to get right and I eventually took it to a shop to get running well. if you get a BMC go for the BMC race... just my $.02
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Superstock
Joined: Dec 2005
Posts: 428
Right now I'm running a Dynojet stage one kit (#1185) with the needle in the sixth slot and 190/195 mains. What parts of the two different kits did you utilize?
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Squid
Squid
Joined: Apr 2006
Posts: 25
From: los angeles, ca
Here's something I read recently about Air Filters
Thread Starter
Senior Member
Superstock
Joined: Dec 2005
Posts: 428
Yeah I read that same article. On most bikes with a tuned airbox the stock filters seem create more power. I'd love to save the $100 and use my stocker but its dirty and I don't want to pay $70 for a stock non-reusable air filter.
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Squid
Squid
Joined: Apr 2006
Posts: 68
Very interesting article.....Thanks a lot!!
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World Champion
Joined: Dec 2004
Posts: 105,287
From: Fulton, MO
I think it varies from bike to bike. On the 1000RR they claim that the BMC makes more power and the K&N you can actually lose power. I don't think that comparison takes tuning into account though. I have a K&N on my bike and it runs just fine with the Factory kit.
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SuperBike
Joined: Nov 2005
Posts: 1,011
I've read that but remember we do have a different motor/airbox and fuel system then the rc51. Plus personally I've noticed a difference between stock and the k&N. And that was after jet kit for the exhaust and stock filter then switching to k&N and exhaust
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Back Marker
Joined: Jul 2006
Posts: 138
From: Downtown Kansas City, MO.
My bike mechanic is very, very competent, an endurance racer, and a former Super Hawk owner. When I got my Jardine high mounts, I discussed a re-jet with him. He adviced me "to never, under any circumstances, put anything but a stock air filter in a Super Hawk." I didn't even bother to ask why. That was enough for me.
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fpalbrecht
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Jun 9, 2009 05:36 PM
