hmmm , isnt it the hose connection on the intake manifold (black bit that bolts carb to motor)

anyways its an easy deleat - small pipe to side of motor with hose attached remove and plug ( I used sheet metal between motor and pipe , bolt up and remove to make sure didnt puncture (my 1st try I punctured sheet metal and it leaked) reinstall ) (or just plug the pipe) , unplug hose from intake manifold to the air injector and plug , unscrew air injector from front bracket toss onto work bench , ride till tires fall off