28-07-16, 05:28 PM
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So could there be an accumulation of dirt that formed some kind of a lime scale that could make those narrow channels even smaller to a point of being too narrow and the only way to clean them out would be by ultrasonic? Was it the cleaning of the jets or the cleaning of the carbs that solved the problem?
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The poor running issue with my bike was caused by degraded and/or evaporated petrol which had left deposits in the carbs.
The workshop said that the main cause was the blocked pilot jet in number 3, but a general accumulation of muck was also contributing to it. The ultrasonic cleaning sorted it all out.
It was a consequence of not riding/refuelling often enough.
I also seem to remember reading somewhere that if you always store your bike on the side-stand for long periods it's more likely that this issue will occur in carbs 3&4.