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Polini boost bottle.
This boost bottle from Polini is designed from the original Yamaha boost bottle design. The chamber prevents the airstream from oscillating back and forth through the carbs venturi when the throttle is released, meaning that the airstream is only charged with fuel once which improves pick-up when throttle is re-opened which adds up to lower fuel consumption and better throttle response.
Designed to be mounted directly into the inlet manifold.
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