This is for a 91 dr250. It's been a good while since I've done this and it was on an ironhead, so I was dealing with pushrods and the such. Anyway, the basics is to find TDC on compression stroke and call it good to adjust to the required specs. Could I just hit the highest gear, toss a straw in the spark plug hole and once it maxes out at the top, call it TDC and adjust, or is it a little more complicated? I'd have a manual but appearently UPS is having issues with finding where I live, so now Im waiting for it to arrive at my work. Im getting some top end noise on the right side of the motor and since Ive yet to do a valve adjustment, Im hoping that's it.