Join Date: Jun 2016
Location: Southern Michigan
Modern air boxes are made to flow as close to what the stock engine needs as the factory is able while keeping intake noise down. If you do mods to other areas to increase performance you will probably benefit from decreased restriction from the intake side. A low restriction filter element may not help on its own if the air box design is restrictive. If you are changing the exhaust and tuning anyway, it would be the right time to increase the airbox flow . I'm sure if you check the forums you'll see examples of air box mods. A high flow filter is subject to debate because decreased filtration is usually the trade off, but at least some of them are washable. Think of where rain will likely flow in, taking wind into consideration. Don't bore holes that will suck rain in. Internal air box baffling is a sound reduction thing and it's usually beneficial to remove it. I'll bet there are videos on line showing what to do on your model. I just googled problems I was having with two different older bikes today and had multiple solutions on both, with pics, videos, parts sources and part numbers . What more could I ask for ? It saved me hours.
07 S4RS, 96 900 SS, 06 Busa, 77 Bonny, 00 Superglide, 78 SR500, 85 Sportster