i would check the compression in both cylinders and the exhaust system to make sure the guy hasnt screwed with it. i would say its too lean, but without knowing the other factors its hard to tell. the reason i mention compression is not because of the noise, but if you retune the carbs, some people use the compression differences to influence the tuning of each carb if the difference is alot., first i would check the exhaust system, i smell a lack of back pressure, and have you retuned your fixed carbs from factory settings, theres a tiny chance it could be a rod bearing going bad.
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Last edited by nanewt02; 11-05-2012 at 04:44 PM.