'80 R100 engine noise
I am in Mexico in the Yucatan peninsula. The closest BMW mechanic or shop I know of is in Mexico City. I am trying to get my bike running in good condition, or at least know specifically what needs to be done to it, so I can sell it. I am using a condensed version of the Hanes maintenance/repair manual. So here are my issues...
There is a slapping or deep pinging coming from the right cylinder head when the bike is idling at 1000rpms. It first started as a tapping sound so I adjusted the valve clearances. I think the noise became worse after I attempted to adjust the carburators. The ignition timing has not been adjusted for at least 7,000 miles, but I have adjusted the points twice. Also the starter seems to have a little difficulty since I adjusted the carburators. My conclusion is that it may be a main bearing failure, damaged pistons, or is associated with the carburators being maladjusted. Do you have any suggestions?
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