Re: Help!! Any carb rebuild experts out there?
Nick I am not a Yamaha man but if the engine was running ok with the jets that are in them then you should keep that size in them. Alot of times a dealer has to rejet a engine to get them to run right. If it has been rebuilt then most likey the jets were richened up some. As for the Seloc manual throw it in the trash and order a OEM manual from your dealer. I would use the R plug. Not knowing the year of your engine there is a good chance the r plug was out yet when the engine was produced.
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