Where on the motor does the small vacuum line from the petcock connect to? I know it is important line that cannot be overlooked.

 

left hand side of the block if your sat on the bike, up th etop near the cam cover.

 

Yup,bike won't start without it. Supplies vacumn to the shuttle valve in petcock.

 

??????????????????????????????????????????? mine was never connected and it ran fine. matter of fact i took it off and plugged the little nipple off the tank

 

line doesn't run to the tank it runs to the petcock. If you plugged the smaller opening coming directly off the tank, you plugged a vent or overflow tube.

 

I hv a 50 cc greely scooter vac lines intake manifold and carb fuel rouying confusing coming from the tank is a petcock vac opetated fuel valve 2 niplled 1 on top one on bottom top i think goes to nipple on top of carb ts to the intake manifold then bottom line goes to nipple on dideof carb with a fuel filter nipple off the engine block gets a air breather filtet now crankase thers a hose going to the frame ?why thers also a nipple on tjat hose from the gearbox i mean so hearbox to engine breather to frame? Or does thay hose connect to the airbox as well?