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I have had experience with my SAI pump with a high pitch whine while running. There is a sealed bearing (Images of IMSB dancing in your head) in the pump and guess what the grease dries out. My fix (Researched fixes) was to take the pump apart, pull out the bearing.
Use a grease gun with a needle tip
Slip the needle tip over the bearing seal and pump grease back into the bearing from a few location around the seal.
My SAI pump has been quite for a couple year now.
A lot cheaper than replacing the SAI pump @ $300+
Be careful with the vibration (Rubber) mounts as they can tear in half due to age
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2002 S - old school third pedal
Seal Grey
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