Just returned from a great week's biking in the Outer Hebrides with the R80. I replaced the broken right carb with a second hand one off ebay. I cleaned it but didn't replace the jets, needle, O rings or diaphragm as these looked in good condition. I bought the left hand carb from the same bike also and fitted it to ensure no differences.
The bike now accelerates well through the range (and sits at 85mph on the motorway without any fuss). Previously it had great difficulty getting past 3750rpm. In setting the carbs up I stuck with the recommended mixture settings from the Clymer manual. I adjusted one carb by minus 1/8 of a turn after noticing a sight smoking on the left carb.
The only issue I have now is that between 4000 and 4400rpm it runs a little rough (like it's very slightly out of time on each piston). Above that and below that it's fine. Is this likely to be a needle jet problem? Also can anyone point me to the carb adjustment article I've heard reference to in various places but haven't been able to find. Cheers.
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