This is the great thing about the Walbro WT-540 and WT-542 carbs. They have a built in "accelerator pump" that squirts that little extra bit of gas to keep your engine from stumbling during transition. You should be able to bang your throttle stick up and down all day long without any hesitations.

I have seen a lot of hand made gaskets with a majority of them being questionable at the least.

PM me if you want a set of gaskets ( there are 2) and a carb. I will prove myself right and not just sit here at my keyboard bragging and seeming fat headed. Your choice on the carb. Only difference between the two is that the WT-542 has shorter needle valves which I find favorable since I shorten the needles on the WT-540 anyways.

They are the same internally and externally and have the exact same throat diameter of 13.49mm. Good for any engine from 30cc to 60cc and this can be attributed to the suberb air/fuel metering capability. The great secret to a good running engine is proper atomization of the fuel entering the combustion chamber, a good timed spark/burn, and then exhausting the spent gasses effeciently.

$25 shipped. You have the ball now! :>)

I wish you the best with your "Bully". I love them dearly...you will too once you get it right.

I almost forgot.....original carbs ( Delorto? )......I have a box of them. I never use them but am thinking about running one on a ST-3250 on glow since they are notorious for poor fuel delivery and the Delorto is a pump diaphram carb specific for methanol. I do not recommend them for gas apps. They are OK but there are much better choices if burning gasoline and oil.

Speedy