Last Sunday my throttle cable went pop. Fortunately I was coming to a stop so it was easy to handle.

Today I looked at the parts list and there seem to be two throttle cables, A & B. However I only have 1 in my bike. That's the one most to the front of the bike. I guess that's the 'A' cable? Am I missing something with having just one cable?
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You can run with a single cable (A Cable). The B cable is used to help return the slide as the throttle is let off.

Thanks!