no fuel
 

hi. a little help please guys
I have just tacken my tank off while i changed spark plug's and filter???? i turned the fuel off by the thing???? under the tank, when it came to put the tank back on the bike will not start, it is getting a spark so i have no fuel, off came the tank again, when i take the hoses off the thing under the tank i get no fuel????????? does anyone no if fuel should flow or maybe a emerg fuel cut off. please please any info would help.

It should only flow with vacuum applied.
There are two spigots that look like they are for the vacuum hose but only one is real.
The spigot that points straight down is a tell tale to let you know if the diaphragm is leaking, while the one that is horizontal is the actual vacuum port.
Make sure you got that right and while the engine cranks pinch the vacuum hose off, this will allow you to stop cranking and still fill the float bowls without killing the battery.
Good luck,
Kai Ju