I'm having a problem with the throttle on this motor. The threads on the knob are stripped somewhat and the handgrip slides completely off which causes the internal parts i.e. (two inner halfs with two small buttons) to fall out. I've put these parts back together several times however I can't seem to get them to stay.<br /><br />Does anyone have an exploded view of this assy. that they can e-mail to me. Also what does the knob have to do with this problem?<br /><br />Any advice would be grateful. Thanks, tedboch