Will a white bros. boost bottle fit on a 400EX or is it just for shees, and how good does it work? Thanks.

 

i would like to know too.

 

nope a boost bottle will not work on a ex

 

ill bet its because of the ex only having 1 carb and the shee having 2. am i correct?

 

No, the boost bottle is only for the Banshee and Blaster.

 

yeah boost bottles are only for 2 strokes.

 

what do boost bottles do?

 

<< what do boost bottles do? >>

In a nutshell....they add intake volume. Couple of theories behind them.....some love them, some hate them. One thing you don't see them on is aftermarket equipped racers....why? Because there is no gain. Sort of like an AMP link.

 

o ok i guess they are not a performnce neccesity then.

 

Boost bottles are only for 2-stokes. As the intake is sucked into the crankcase, it creates a low pressure area inside the bottle. The low pressure then pulls air into the bottle while the reeds are closed. As the crankcase pulls air in, it is taken out of the bottle as well as the intake (increases intake volume just as Gary said). They are not only for twin cylinders. On twins they are supposed to help equalize pressure between the two cylinders. Many yamaha's had boost bottles from the factory, old YZ250-490, Tri-Z's and I believe early blaster's. Gary is right, they really don't work.