Hello! I am new new to the forum and seeking help. I have a 1993 Suzuki king quad 300. It was recently given to me as a project bike. I brought to my cousin who is a mechanic. in about a week he had it running it ran fine for about three days after that i have had nothing but problems.The problem i am having now is it wont start unless someone pulls me and i drop the shift in 2ND or 3rd gear. I changed the spark plug the wire, clean the carb and adjusted it. new fuel pump. what is the problem.

 

I'd do a compression test.
The valves may need adjusted.