I have a 77 exciter 440 that ive been struggling with..looking for some help or some troubleshooting tips...ok so when i put gas into the carburetor by holding the throttle open and squirting it in the bowl or whatever, i then pull it over and it starts and runs till the gas i squirted in it is gone...ive got clear gas lines and i can see the gas go up the main line and i dont understand why it dies when it clearly looks as if its getting there...what is my problem guys? Thank you