BMC race vs BMC street vs DNA vs K&N
12-21-2006, 01:39 PM
#1
Senior Member
Superstock
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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?
12-22-2006, 09:14 AM
#2
Seņor Miembro, Ay Caramba
SuperSport
Join Date: May 2006
Location: a little north of DC
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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.
12-22-2006, 09:37 AM
#3
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SuperBike
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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
12-22-2006, 11:47 AM
#5
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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?
12-22-2006, 06:33 PM
#6
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Squid
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Here's something I read recently about Air Filters
12-22-2006, 07:17 PM
#7
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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.
12-23-2006, 01:40 AM
#8
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Squid
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Very interesting article.....Thanks a lot!!
12-23-2006, 05:31 PM
#9
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World Champion
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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.
12-23-2006, 10:40 PM
#10
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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
12-26-2006, 11:16 AM
#12
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Location: Downtown Kansas City, MO.
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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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