Originally Posted by RK4ME
In all my years of riding, I've never had to "research" anything other than the owner's manual for the recommended lubricants. Any good quality 4- stroke motorcycle oil will give a Harley transmission all the lubication it needs, and a Harley transmission doesn't even have to share its oil with the engine. I run Mobi1 V-Twin 20w50 in mine.
Well you must know more than some of us, the factory manual for my 95 softail doesn't list any specs on what goes in the transmission or primary other than HD part numbers and being new to harley's I really have no clue either what goes in them.
would the 75/90 or 75/140 gear oils be the stuff to use in the 5 speed in my evo as well?