Has anyone installed a manual decomp. assy. from a 426 on a YZ 450? The 450, under normal conditions can actually be started by hand (I've done it) but sometimes, after laying it down (upside down?) the motor loads up and requires kicking until one is red in the face to get going again. With a manual de-comp capability, it is a small task to pull the lever in, hold the throttle wide open, kick it over 5-6 times to clear the extra fuel out of the cyl, and then start normally. Any thoughts?