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Message: <blockquote data-quote="mike in idaho" data-source="post: 24319" data-attributes="member: 468">I may be wrong, but isnt b-12 supposed to be a soaking type cleaner? Randakk recommends cutting with 1/3 gasoline and draining the stuff back out.Not sure if I like the idea of pumping them through the fuel pump then burning them in the engine. ESPECIALLY after they have picked-up whatever they dissolved in the carbs... this to me seems like your actually just moving the gunk on through the engine.I just pulled the carbs apart on my '82 GL1100 after leaving it sit with B-12 in the carbs for a month. I had assembled the bike from a pile of parts, the carb set was really nasty inside(e-bay junk) and the engine needed a valve job for sure(you could see rust in two intake holes).  I wanted to see if it would run at all in that condition. Got it started on straight B-12 and ran it for a while, no bearing noises and good oil pressure, it didn't do very well off-idle the low speed jets were mostly plugged. Anyway I got back to it the other day to pull it apart, the varnish in the float bowls was loosened up nicely and the jets cleaned up well. The float bowl o-rings looked ok, maybe a bit swollen from the chemicals. All four cut-off valves were stuck in the carb bodies and had to be pried out, the diaphrams were dry and unaffected by the cleaner.</blockquote>