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08-23-2001, 12:20 PM
hey everyone, i was jetting my 300ex and there is this whitish/clear box to the side of it, bolted on to the frame. there is a tube out of the back connecting to the air boot and a tube out the front connectioing to the engine. i may sound like an idiot for not knowing this...but what the heck it this thing?????

oynot400
08-23-2001, 12:53 PM
Sounds like the crankcase breather.

max400EX
08-23-2001, 02:04 PM
yea.. its a breather. It cant be bad bc i have one too:)

400exRacerX
08-23-2001, 02:31 PM
yes its a crankcase breather, it releases the pressure from the crankcase and sends the air pressure into the air intake boot and boosts the intake of air.

08-24-2001, 09:47 AM
oh ok thanks for the help guys