I have a Gas Gas TXT280 pro 2004 which takes a lot of kicking before it starts. Cleaned all earths, have a good blue spark. Changed pilot jet from 35 to 40, adjusted needle clip to 3rd notch down, mixture set at 3.5 turns. Bike only starts if air screw is almost right in, idles great. Seems like every time I start it I have to mess about with air screw. Is this right??? Don't have to do anything with my other bike except kick it. Thanks.