I'm pretty sure that that is an air leak problem. You could have that problem with any car.
Here's a little check list you can do.
1. Replace all of your fuel tubing.
2. Make sure that the nipple on the exhaust pipe is not clogged.
3. Make sure that the fuel filter is not clogged and air tight.
4. If you can blow fuel from the fuel tubing that goes to your exhaust pipe to the carb, or if you can blow into the fuel tubing from the exhaust and put your finger over the end of the fuel tubing that goes into the carb and air does not leak, then your fuel system does not have an air leak.
I hope that this has been helpful.