So I'm in the midst of putting bike back together after removing the air box and swapping out some jets. I came across the Kleen Air system, and was going to remove, but when I saw a few threads on here, it looks like there may be a certain combination of mods that will allow the bike to run well with out it. Not sure if I need to go that far, so I thought I would just throw a breather on the end of hose where it used to connect to the air box.

Has anyone done this before? No major affects? What size breather?

Thanks~

Just remove the system all together and put a plug at the hole in the airbox. You can buy a block off plate or make your own, or be cheap and shove a bolt into the tube and clamp it.

http://www.ninjette.org/forums/showthread.php?t=9948

I have a breather on mine and modified the valve abit, so now on decel it backfires little blue flames. Some like, some don't. Do what pleases you.

Already have air box removed, so plugging off that hole isn't an option...I'm just wondering if there is any performance/runability advantage to having it/not having it. Reading the previous issues some had with, which were most likely caused by modding, then jetting, then removing Kleen system, then having to retune carbs, I wasnt sure if someone had found a tried and true setup.

I'm doing all this work (airbox removal/pods/jetting) in cold Ohio, so I won't really have the best environment to run it before spring.

Think I'm going to throw a breather on it for now until next year, see how it runs, and then remove later after fine tuning the carbs.

Thanks~