This is my improved case or crankcase breather mod. It can be done on any bike to allow the crankcase to breath better and is an all around great improvement to do on a bike that is "all plugged up." Basically I took off the small diameter crankcase breather hose and installed a large diameter hose in it's place. Automative heater hose was used but you could also use fuel tubing. I installed the new hose into the air-box where I attached a small universal Uni filter to prevent dirt from entering the hose. I tucked the hose and filter down and re-installed the seat. That's it. I did this mod on my Kawasaki KLX300 and Honda XR200R. Also, if your old breather attached to the air-box, don't forget to add a rubber plug to the spot where the old hose attached.

Credits: Submitted by superhondaz50 to our "Best Low-Buck Mod" Contest, and edited by 4Strokes.com.