Motorcycle Repair: 85 honda magna, honda magna, cap works

Question
QUESTION: hey i work in a shop and i am certified by harley davidson and i have a old honda magna on my lift it seems to stall every time you accelerat than slow donw then it stalls i worked on the carbs bike was not running when i got it i have 3 ideas the carbs need 2 be synced ,the fuel tank was completely rusted inside and i cleaned as well as icould i used A rust removing agent and i got it out but it seems 2 be starving for fuel i cant get it to ride as smoothe as it should also i did not replace the spark plugs i cleaned them very thoroly and checked itf the coil sparked and they do but i want to know what u thing if u want 2 answer me through email or you could call me at 9788706007 plz point me in the right direction thank you jan

ANSWER: Hi,
It sounds to me that you are still having fuel supply issues, take the fuel line off the carbs and open the valve; make sure plenty of fuel comes out and stays flowing.  Check that the vent in the gas cap works.  Plugs are cheap; change them anyway.  The carbs may have to be cleaned, the idle circuit is a pain in these carbs.  Good luck,  Jan

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QUESTION: i cleaned carbs i have read about sea foam and i also cleaned/ old fuel lines but it wont really idle with out choke and i cleaned these carbs very thoro i think a mess but this bike needs 2 get done. i noticed on a few forums the mentioned sea foam working really well andy mor tips i also dont have a carb syncing device. could old oil ing the engine affect it

Answer
Sea foam is good but I don't think it will fix your problem.  Did you check the compression on the engine?  All cylinders should be within 10% of each other.  Synching the carbs is important too, but if you didn't adjust the butterflies then the carb synchronization should be OK.  Good luck,  Jan