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the '07 has evidently sat dormant a good portion of its life. in sitting, the fuel "drops out", turning into a varnish...obstructing and finally clogging to varying degree and constricts fuel and/or air flow...some,all or none...to get through their tiny, winding passageways.
After some years a "carb clean" is called for, areas where varnish has accumulated must be cleared. Some of those areas are visible, some are not.
Full, complete disassembly is called for to allow full access to these affected areas which include the starter , pilot, air circuits, main mixing chamber, decel circuits, fuel flow pathways. Renewing all pilot, vent and fuel rail orings (at 13 years old they demand replacement) and float valves. Reassembling after aggressive cleaning methods (which vary upon composition of the component involved) following with correct synch, pilot screw and float adjustments (aka setup). Wet testing insures no leaks and correct fuel levels....better to find and correct errors on the bench prior to install on the bike....insuring getting it right the 1st time... no further carb pulls necessary and a reliable runner upon install.
Well, thats what you've got to accomplish here. I left a lot out, too. Examples such as troubleshooting the internals ...inspecting/measuring pilot jets to assure they have not been altered, correcting any assembly errors/missing/wrong parts/poor adjustments, defects or other repair attempts from prior owners...a lot involved in *true* comprehensive carb servicing. Some stuff to consider.
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