Your transmission fluid needs to have the weights added example 75/90 or what ever it is actually. To most Harley Davidson motorcycle riders it's important for comparison for assurance that it will be of the HD level in weights. It would be a selling point it is for me at least same for Primary fluid .
My initial run after switching to Amsoil for my bike (Heritage Classic 114), easy to shift with less noise. I should mention that it was 10C (50F), during my ride and it was a short ride at that. Weather is not co-operating for an extended ride. My observations on the oil may or may not change after the oil reaches a higher operating temperature.
I had the SYN Harley oil in 2012 Road Glide and seen a video on face book about the product.. Should have did a long time ago.. It is like NIGHT and DAY..The clutch is so much smoother.. quiter and so much better.. Like a new bike.. So much easier to change gears now……..
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
80000 mikes in 5 years on Harley
By 
VINNY B , 
a 
Verified Buyer 
from 
New Germany (Jersey) 
on 
May 12, 2026
80,000 miles on my bike and just rebuilt the engine for more performance. No discernible wear on Cam, cylinder walls, piston / rings, compensator or clutches. Changed everything for high performance parts but old stuff was amazingly looking pretty good.
Bottom Line
Yes, I would recommend this to a friend.
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5 star rating
Trans oil
By 
JOE, 
a 
Verified Buyer 
on 
April 29, 2026
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