Folks,\n\nI'm working on a '94 Honda VFR750 that has been sitting a couple of\nyears. The throttle was stuck closed, and some digging around showed it\nto be one of the throttle butterflies. It has some hard varnish on it\nand is a little darker than the others. Inspection of a float bowl\nreveals only some varnish depositsn nothing green or growing. I've been\ndoing my reading and have a couple of spray cans of Berryman B-12 at\nthe ready, but I'm hesitant to just spray it all over everything for\nfear of damaging the rubber bits that may be hiding in the throttle\nshafts. So far, I've sprayed a little bit in the venturis and tried\nsoaking the butterflies with WD-40 as well, but nothing's budging.\n\nDo I need to bite the bullet, break the carbs apart and tank clean\nthem, or is there a less invasive option?