mobile 1 sny 74/90
Amsoil MCV 20W-50 Synthetic Motorcycle Oil you can use it in all three holes.
20-50 wt motor oil OR HD Primary oil
HD makes a weight of oil they call "Sport-Trans" that is made for use in the Sportster primary. Or, you can use any 30W non-detergent oil.
HD recommends 20w50 in all three holes. oil, tranny, and primary.
Harley has what they call primary chaincase lube, but because you are only oiling the chain, even though the clutch is also inside the primary, you should use only enough oil to catch on the ring gear allowing it to be flung up onto the chain, and it really can be any oil that you think lubricates your chain. In the absence of HD lube, I use the same 20-50 wt oil that goes in my oil tank
remove the derby ( round ) cover on the primary. fill until the oil tries to run out. replace the derby cover. we use the same oil as in the engine. 20/50
Basically, the only difference between HD-46 and HD-68 hydraulic oils is the weight of the product. HD-46 is a 15 weight oil, but HD-68 is a 20 weight oil.
You fill the primary/transmission oil supply with one quart of HD Sport/Trans through either the derby cover or the chain tension test cover.
The primary on the HD transfers power from the engine to the transmission.
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