Quote:
Originally Posted by NedSVS
The boost bottle works as follows: when the reed valve shuts the intake charge still has momentum and it travels up the tube to the boost bottle and when the reed valve opens again it travels back giving a small boost. The revs it works best at are probably dependent on the length and diameter of the tube and the volume of the bottle.
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Thanks for the explanation. But why doesn't my 250 have one (or two), it does have a balance pipe between the inlets on each cylinder, does that do the same job?