Yesterday I pulled the carb on my WR for the first time. The flat slide is new to me. Decided to shoot some carb cleaner through the passages make sure it was nice and clean. Today I find that the enrichment knob/cold start plunger is stuck in place. Put a vice grip on the brass shaft and it won't budge. I am afraid I will twist it off if I crank too hard on it. Is there plastic on this that I melted? Anyone run into this before? Any thoughts? I am taking the kids out of state this weekend for a week long riding trip and don't have time for this.