What is a "double-pumper" carb?

Woodz428 · #1 (**permalink**) 12-03-2006, 05:15 PM

2 terms that are often confused in some circles are Dual feed and double pumper. A double pumper is a mechanical secondary carb with 2 accelerator pumps, one for the primaries and one for the secondaries. That way when you kick open the secondaries there is no bog or pop back. A dual feed just means that there is and external fuel line to both bowls insead of a small tube leading from the front bowl to the back one. I don't know for sure which carb you have but I believe all Street Avengers are vacuum secondary and would not be a double pumper.

Sledge · #2 (**permalink**) 12-03-2006, 05:27 PM

Thanks WDZ!

Ron61 · #3 (**permalink**) 12-04-2006, 09:27 AM

Sledge,

The others have really covered this well, but if you have a double pumper you can tell easily with the motor off by just opening the throttle wide. You will see the gas squirt into the secondaries just like the primaries. Mine has a way to adjust where I want the secondaries to come in by changing a small cam link.

Ron