Hoping someone can tell me how to adjust the carb on my agility 125. I took off the seat and front "fairing" I think you call it? I couldn't see a screw for adjustment. Do I need to take the needle out and move the C clip to adjust the carb or is there a screw. And what's the best setting. My scooter takes a long time to warm up without bogging out when given throttle. Usually have to run it down the road after warming up and still takes a while to lose the bogging