how can I fix my chinese import scooter, Benzhou - Yiying 125t?

I bought a chinese import scooter last april, the make is Benzhou and the model is a Yiying secutor 125t. The problem with it is it takes ages to start the thing about 30-40 kicks as it wont start from cold from the electric starter. Once I do get it going I then have to keep the revs up to about 3000 or the thing dies on me. It also seems to be revving high then low on idle and will rarely settle. I have checked the air filter which looks spotless, and Ive played about with the idle adjustment & Pilot screws on the carb to no avail! I use the scooter every day and need it for my work. Everything else seems to be okay, it's just the 5-10 mins to start it that is the problem.. someone pleeeaase help me!!