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I don't use my Bonny as much as I should and its been getting progressively harder to start. Today it would only run at idle on full choke and wouldn't rev up. I found both pilot jets were completely clogged with some material so hard you couldn't push a wire thru it. I tried the old trick of boiling in lemon juice, then immersing in lacquer thinner for a couple of hours. Nothing shifts it. Fortunately I had a spare pair of 42s I've been meaning to fit anyway and after that she fired right up. I cannot imagine as an ex chemist what the heck is going in to present day gasoline? From now on I plan to run the carbs dry after every run
 

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Have you been using crappy "no name" gas for it? I'm a firm believer in using only "premium" brand gasolines in all of my vehicles. Do a thorough cleaning of the carbs & flush out the tank as well, and you should be GTG.

IMO, going on the cheap will only cause bad results farther down the road, so to speak...:D
 

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It could have been left over cosmoline that finally dislodged from wherever it was inside your carb.
 

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i usually only go sunoco or mobil if i hit reserve away from a sunoco (the sunoco thing is my political preference, as i HEAR theyre american) but no matter where i go i dont put in less than 93 octane, and ive let the Speedy sit all winter with no stabilizer (course, i start her when i can). havent hd any problems thus far.
 

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I just went through the same thing, I pulled my stock Pilot jets. Both were almost plugged with black jagged stuff. The main jets I pulled last year were okay. Two years ago I used Stabilizer and this year because bike was being rebuilt due to accident :mad: it was stored in heated show room. I also found large bits of opaque material in one bowl. Not sure what is going on as my Snowblower had the same results. From now on I am draining the gas tanks and running the carbs till dry and then drained. Gas is not the same. The ethanol is drawing in moisture and the composition is not stable.
 
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