Has anyone ever had to adjust the valves on the Jetmoto 250cc? If so what shims do you need to do the job? Also if anybody has a prcedure with pics i would greatly appreciate it. I heard if this arent set properly your atv wont run properly. I just want to check mine to make sure they were properly adjusted. Ive had my jet for a year and have not had any problems. But want to check every adjusment to make sure i keep in good shape. Also when yu ride at the dunes do you usually check PSI when you get out there or on concrete is fine? Thanks