What won't my 1985 Honda v45 magna no start?

i have a 1985 honda magna bobber. the reserve tanks is gone and petcock as well. i can see the pump pumping but no starting , just for a few sec. when i turn the handle grip it dies. i tryed starter flud and it starts wide open. i poor some gas in the air box and it was start untill the gas is gone. any ideas?
 
Back
Top