Riding well is all about control. And the more precisely your controls are set up and operate, the better the experienc ...

You've bolted down that brand-new carburetor or EFI system, attached the fuel lines and are ready to hit the key for the first time. It's then you realize, "How are we going to attach the throttle ...

Carburetors with vacuum lines are still found on classic vehicles and small-displacement engines — but what is the vacuum actually used for? Let's take a look.