Hi, I´ve recently picked up an 82 GS550, it´s in great cosmetic shape, however missing mufflers and does not run properly. It will start but only 3 of the 4 pipes feeding into the muffler warm up. I have checked for sparks and they are good, I´ve been told it may be a result of bad carbs. Are there any other suggestions/possibilities? You can e-mail me at arcsports@shaw.ca. Thankyou for all responses. 
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