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Any 10-40 motor oil will work fine in the primary, and about any 75-90 gear lube will work fine in the transmission. I run Harley Formula Plus when I think to get it when I am there. Otherwise, the above works just fine.
I use rotella 15w-40 diesel oil in the primary. I use it in my shared sump Honda bikes with no issues and have been using it in my primary since I got the bike. It has the JASO rating which means wet clutch safe.
You could use it for the tranny as well however I would use gear oil personally. Shockproof heavy is the best stuff out there. My Indy changed my tranny fluid when they put in the 106 and within 2000 miles the bikes shifting was notchy and clunked when going to first,neutral was tough to get into. Put the shockproof in last weekend and within 10 miles my tranny was back to being smooth again. I will never put motor oil in my tranny now that I have felt the difference.
I bought my fluids at autozone yesterday.
Mobil 1 V-Twin for motor,Valvoline 20W50 MC oil for the primary and Valvoline 75/140 full syn. for the tranny.
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