Main Motorcycle: 2005 Rocket III
Join Date: Feb 2006
Other Motorcycle: 2001 Roadking Classic
Extra Motorcycle: 1999 Busa
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Also i've been reading up on Super tech 75w-140 vs Mobil 75w-90 ,seeing how there's maxium shearing going on in there and they say it reduces the whining sound..?? Any thoughts on this..?
changed mine last weekend. The procedure is in the factory service manual. Bike needs to be upright, so you did good.
Stayed with Mobil 1 75W-90. I called the tech line and it is equivalent to the Mobilube 75W/90 SHC listed in the shop manual. Mine had some crud on the magnetic plug and the oil was discolored from the spline lube for the bevel box. Flushed it until it ran fairly clear, then filled.
That fill plug is definitely on there tight. 60 Nm. Good advice to loosen before standing the bike upright....that's what I did too.
Well, viscosity itself has no ability to prevent molecular shear. The two things are largely unrelated. The whining sound is also no indication of same.
Extra viscosity means extra frictional loss in the oil itself and extra heating. I can't think of any legitimate technical reason to use heavier oil than recommended.
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