Ask RideApart: What Are Velocity Stacks and Throttle Bodies?

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Category: Ask RideApart

You ask, the community answers. It's Ask RideApart. This week: What are velocity stacks and throttle bodies and why are their dimensions important?

This question comes from reader Holden Lewis, who asks: "I often see motorcycle articles that refer to different lengths of velocity stacks, and different diameters of throttle bodies. What are velocity stacks and throttle bodies, and why are their dimensions important?"

Who knows the answer and, more importantly, who can explain it in the kind of simple, clear language that even the RideApart staff can understand?

Have a question for us? Post it on our Facebook page, or on Twitter using the #AskRideApart hash tag. We will select the best topic from our submissions and post them here each week.

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