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    Twwin 50 gi dished intake valves both engins

    was running at 4400 rpm when s was running at 4400 rpm when started to loos rpm found port eng. no comp. 1 cyl stbd. eng. no comp. 2 cyl. both eng. dished intake valves at same time. WHY? machine shop has seen a lot of this in the last 18 mos. thinks lo octain related. aney advice on what to...
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