After checking all the obvious things - connections to the coil, jetting etc I decided to have them sonically cleaned, which should have removed any gumming up of the tiny passages within the carb body.
I have a pretty good idea what I'm doing, so I stripped the carbs completely before having the work done as it's cheaper! However, the firm I use would have stripped and rebuilt had I simply delivered the complete carbs to them, and charged me an hour's labour.
The best way to do a job like this is take pictures as you go, so that you have some reference for putting it back together. If you do get stuck, there's plenty of us have photo's already to consult and post. Best of luck!
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball
Last edited by Dave Ett on Sat May 22, 2010 9:12 am; edited 1 time in total