Son was given a Baja Dirt Bug with the 97cc motor. It had been sitting for a while, and would only run on full choke. We cleaned the carb and gas tank, then bought a new carb. It will still only run at fast idle on full choke ( we have adjusted the set screw for hours to try and get it running with no choke - no dice). There is one thought we think might be a problem, and that it the breather tube where it goes into the block. Should this be an air tight connection? Looks like there may be a rubber bushing or something missing, as our hose just goes into the metal sleeve, and is loose. Or are we missing something else?

Any guesses kind people?

Thanks, Torben