Need Help Please!

hi just put new piston rings on my 125 typh 2t plenty of compression but still didnt want to start so i put a capfull of petrol into the cylinder put spark plug in and kicked it bike started but stopped almost as quick as it started i asume its a carb problem but i recently put oil and petrol hoses on didnt have a good image in my haynes manual has any one got any ideas cheers

 

Did you use sealant & a new gasket?

 

yup brand new genuine gaskets think problem is with the carb gotta give it a clean