This last week I was pulling my son and some friends around on a tube. My motor sounded a little off. I came home and check the timing, I noticed I was not getting the full 25 degrees of max advance. I can move the advance arm against the stop and then I will get the 25 degrees, but just moving the throttle arm full forward I cannot get it. I have checked the routing of the trigger wiring, and it is as it should be. The only thing different about this motor is it has a Simonmotorsports alternator. The wiring for the trigger and the stator run under the mounting brackets. I pulled the flywheel and stator off, looked at the trigger, cleaned the pad where the trigger sets, cleaned the trigger assy, lubed the throttle arm assy, still not enough advance. Any Ideas?????? Gary