I have a Kinetic with a Proma Circuit pipe and it starts/run fine, BUT - whenever I run it, consistently after about five minutes it starts bucking like it's not firing or there isn't gas flowing into the cylinder or something. When this happens I'll let go of the throttle, wait for just a second, and then it usually catches back up. Which leads me to think it's a gas flow issue.
I'm going to clean the carb just for kicks because it's probably been a few months, but I have a sealed tank and a fuel filter so I'm pretty sure there wouldn't be anything clogging it up. And it's weird to me that it consistently starts about 5 minutes in - as if the bowl is full from sitting and then it starts running out and the gas isn't flowing into the carb fast enough to fill the bowl or something.
Any other thoughts on what this might be, or if my assumptions are correct how I might go about fixing it?