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Again, one of those items where the on-line manual may differ between the 500's and 650's....and I remember reading about some differences between the 650 and 500 carbs (can't put my finger on the thread). I don't seem to be able to see any visible exterior adjustment screws on mine. True?



So, if there are no jets, what would the cleaning procedure be?....just drop the whole lot into a bucket of CLR and water? Or do I do a partial dismantle and remove the domes and only drop in the "bottom half" ?



Or....
 

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Again, one of those items where the on-line manual may differ between the 500's and 650's....and I remember reading about some differences between the 650 and 500 carbs (can't put my finger on the thread). I don't seem to be able to see any visible exterior adjustment screws on mine. True?



So, if there are no jets, what would the cleaning procedure be?....just drop the whole lot into a bucket of CLR and water? Or do I do a partial dismantle and remove the domes and only drop in the "bottom half" ?



Or....




http://www.donandroys.com/fiche_sec...ry=MOTORCYCLES&make=HONDA&year=1983&fveh=3406





HTH
 

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For cleaning purposes I don't think there is any difference between 650 and 500 carbs, except maybe your carbs may have a removable idle jet.



The adjustment screws are not the jets, they are idle mixture screws and are located near the front of the carbs under the venturi that connects to the intake manifolds, the screw with the spring around it ,see the pic below.







The jets are inside the float bowls and can be seen in the pic, they are the brass inlets at the bottom of the pic. the low jet has the red arrow on it, the high speed jet is the one screwed into the brass hex fitting.



The idle jet is the one in the middle that the red line goes through.



Above the jets in the pic below you can see the emulsion tubes or nozzles that are also removable and should be cleaned too.



 
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