Hi YongGun, after i read your problems i checked my self on my model if the left side fairing and the steering damper will do problems. I build to the 2005 Yamaha M1 with o couple o minor improovments, so, one part what i use extra is the steering damper from Top Studio. The enigne, fraim, steering and tyres are ready, the fairings are painted with primer and a coat of paint. I need to recoat again but in this moment everything fit's perfectly. I don't believe the fairing will warp so much after paint and clearcoat. I neved had such a problem.
In your case probably the fairing is still to thick, and the many added details are the problem, but this is not your fault. But one question, why to cover them and not to show them? At least let the left side open, in this case the viewers have much more to see from your stunning work!