Thought you guys would like to have a view, yeah it's an RC51 specific write, but it's all pretty much universal to motorcycle air filters...
http://www.rc51.org/airfilt.htm
And the first link to the dyno charts re - the BMC filters...
http://www.rc51.org/dyno/bmc.htm
I've never been sold on aftermarket air filters like K&N, but if you've tried 'em and had good results and feel confident your engine isn't taking any additional abuse from increased flow of harmful particles, then I stand to be corrected...
"Keep yer feet on the pegs and your right hand cranked."
http://www.rc51.org/airfilt.htm
And the first link to the dyno charts re - the BMC filters...
http://www.rc51.org/dyno/bmc.htm
I've never been sold on aftermarket air filters like K&N, but if you've tried 'em and had good results and feel confident your engine isn't taking any additional abuse from increased flow of harmful particles, then I stand to be corrected...
"Keep yer feet on the pegs and your right hand cranked."