Over the weekend, I had my girlfriend on the back and the problem arose. The machine slowed down then all of a sudden the throttle kicked back in (probably wide open) unexpectedly, injuring both me and my girlfriend. I filed a complaint with BBB this morning. I doubt anything will come of it though.
Sorry to hear that. I think for your safety, you need to spend the 600 on the new cluster. Then take up the matter with BRP.