"clean carbs" has different meanings depending on who's talking. Do a search for "ducatiman clean carbs" for real meaning of cleaning carbs:
1. completely disassemble carbs down to last component, o-ring, spring
2. soak in caustic radioactive solvents in ultrasonic cleaner
3. ream all holes with matching size copper/nylon wire
4. floss hidden secret fuel passage with expando wire
5. soda-blast all fuel-circuits @ 10,000psi
With the removal of chlorinated compounds, "carb" cleaners nowadays are as effective as pee. I used to clean my sprockets-guard with them back in old days and chucks of grease and oil would slide off leaving clean parts. Stuff you get now drips off clear and grease and oil stay right where they are. If anyone thinks carbs are clean after spray this stuff, they really
do not have clean carbs and their problem symptoms will persist until real cleaning steps are taken (see above & below).
Quote:
Originally Posted by n4mwd
Here are the secret passages in the carbs. They are kind of hard to figure out sometimes and this picture guide will show where they are for cleaning purposes.
Carb Pilot jet Circuit
Carb Main Jet Circuit
Carb Fuel and Overflow Drain
Carb Diaphragm Intake, upper choke and vacuum ports
Carb Choke Circuit
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Also disassemble carbs down to individual components for thorough cleaning of each part:
Take apart emulsion tube into constituent parts: main jet, holder, needle jet collar. Note how needle-jet collar is oriented so you can re-assemble later same way. Unscrew pilot jet being careful to not lose spring, washer and O-ring. Might as well replace O-ring, float-bowl seals and float-valves.
Then use soft copper wire of various diameters to poke through all tiny little orifices in all parts. Some people use guitar string to floss out secret passages in carburetor body. Blow compressed air through all circuits and verify you've got air coming out other end.
Here's good site for working on these carbs:
http://www.vulcangadgets.com/files/keihin_carb.html
These real cleaning steps restores carbs back to factory-fresh condition and bike runs exactly as it did when rolling off dealer floor with zero miles. If bike doesn't run like that, then carbs are not factory-fresh clean.