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**SS Scott** · 02 Jul 08, 01:03 AM

My bike was dyno-tuned two years ago. At the time it had a K&N airfilter with the airbox top removed and Two Brother Racing slip-on. The new injection map made a significant difference. Since this setup I replaced the Two Brother slip-ons with a set of GPR slip-ons. THe bike has not run the same with these new slip-ons.

I removed the airfilter to see if it made a difference, unbelievable! Without the airfilter the bike runs better than ever. Great throttle responce and very smooth.

Is it ok to run this way? I have always used an airfilter.

02 Jul 08, 01:03 AM	#1 (permalink)
SS Scott Newbie Join Date: Jul 2008 Posts: 2 SS Scott's Gallery Bike: 2000 900SSIE	Can I run without an airfilter? My bike was dyno-tuned two years ago. At the time it had a K&N airfilter with the airbox top removed and Two Brother Racing slip-on. The new injection map made a significant difference. Since this setup I replaced the Two Brother slip-ons with a set of GPR slip-ons. THe bike has not run the same with these new slip-ons. I removed the airfilter to see if it made a difference, unbelievable! Without the airfilter the bike runs better than ever. Great throttle responce and very smooth. Is it ok to run this way? I have always used an airfilter.