F5, the throttle only stuck open in that video because that fallen tree was on its way to impaling me but it caught the crossbar and pulled the throttle cable WFO. I didn't see it coming because I was distracted by the engine problem and was wondering what my buddy was trying to tell me.
Leading up to that event you can hear the exhaust change (like the chamber comes loose) and engine lose power so I was struggling to make the climb.
The bike runs beautifully 99% of the time so I don't think its carb related but it seems like something is loose somewhere and gets jarred over rough terrain.
I will order some bearings as Jacob suggested but everything moves freely.
I'm leaning more towards aliens and want to just ditch the centrifugal governor and go with a servo driven valve like Yamaha's EXUP but that is a winter project.
Thanks again for the feedback,
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