Wow you really McGuivered your lever well. Impressive. I used to live in Chiang Mai years ago and am in Phuket these days. Well those fires from my understanding are set by locals to burn off the agriculture land for planting and they get out of control. Could be other sources as well... Its been raining down here off and on for a while now. Monsoon comes from the south so we get it before you :) Enjoy your riding and hope you fixed your ride ok. I used to mt bike loads but not here. I'm a road cyclist. Would be fun up north though.