[solidaxle]

I did a smoke test to find my intake crack. Go on youtube and search how to build a smoke tester for vacuum leaks. They are cheap to build. Cover the exhaust and carb with latex/vinyl glove and a rubber band to seal in the smoke. If you don't have a port on the intake you can rig up something to seal the hose down the carb throat.
It's best to use a metal top glass jar and epoxy the soldering iron and hose connections, they will twist and pull out if you don't. You don't need the bike air pump just gently blow in the hose. Remember to exhale not inhale, Ha Ha.