i dont think there is in air leak. there may be but im not so good at this kind of stuff. it rides fine it just seems to go a little fast without me giving it any throttle. but as i understand all things with engines once the engine is engaged have a natural "go" so im probably just not used to it. one of my concerns is the clutch. it needed to be re tightened 3 times already. it just seems to lose its tightness rather quickly and wont let me pedal. i gotta get used to releasing the clutch and giving it throttle more smoothly probably gonna take more practice i sometimes jerk it and im sure that jerking is losening the clutch . im taking it to work today its about a mile or 2 away. hopefully it will be a fun enjoyable ride. wish me luck. if you have any tips for me im all ears