Gy6 problems

[asres]

Hello,

I am new here... but i have some serious problems, first, i bought:
- 72cc whole cylinder kit (with head - harder springs),
- A9 performance camshaft
- main jets (82-90)
- new air filter, engine oil, new spark,...

I have tried to install those things, but i realised the valve head (one spring) was allways stuck - bad valve spring... so no good...
-then i installed stock valve head.
-Then i was on timing.... the timing mark and cam marks was correct (at TDC)... but now that i installed new cam, i cannot allign the cam marks perfectly with the block. So i leaved it so, because i thinked, that if im wrong for 1 tooth, the scooter must work, and i can adjust it later, when i test it...
-then i cleaned the carb and changed the main jet with a 85.

until then, i cannot start the scooter... even if i suck on the vacuum hose, to fill the carb.. it dont works... i have air, i have a good spark-s,...

but for the fuel i am not so sure... because the spark is dry...
i noticed that if i touch at the carb air intake, it somehow, "trows" the fuel out.. not "sucks"....

Can this be the problem, and if, whats the problem... please correct me, my steps, what i did good and what wrong... correct me.. i want the scoot so, want to fix it...

tnx