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Oil Pump
Posted: Mon Mar 01, 2010 12:19 pm
by modsingle
Is there another way to determine the upgraded oil pump other than the red or black paint? I have three engines with the oil pumps that have no paint. Were the upgarded red dot pumps put on the 81SRX?
Posted: Tue Mar 02, 2010 7:15 am
by Vmax540
The oil pump output can be controlled by the number & thickness of the shims (per service manual) I believe this would have been how Yamaha upgraded the pumps ? I have both and could tear them down and look possibly tonight. Problem is someone could of done the same ?