View attachment 156402
1997 Harley EVO,
Changed out oil, trans and primary...
Engine oil always change 2x a year the last 26 years or whenever I get bored...
Primary and trans 1x per year.
OUT
Harley 20w-50 conventional engine oil
Harley Formula + Primary
Harley Heavy Synthetic gear oil ( in the trans )
Harley Filter
IN
Bel-Ray V-Twin 20w-50 Mineral Engine Oil
Bel-Ray V-Twin Primary
Bel-Ray Big Twin Transmission Oil 85W-140
S&S 4101 oil filter
I have used many brands of fluid in this bike from the 1st 300 mile break-in oil change to now after 26 years and I can say I have learned ( in general )
My engine hates synthetic ( top end tick ) loves mineral oil ( zero top end tick ) and my
trans is also fluid "picky" with 1st gear "clunk" and finding neutral... My trans loved Synergyn Syngear II ( no longer made, rats! ) but my transmission hated most others including the new Harley Heavy Synthetic Gear oil but loves the Bel-Ray Big Twin 85w-140 ( non synthetic ) Transmission oil. The shifting is now smooth as butter!
I am new to Bel-Ray but I am Very happy with the Bel-Ray products. Engine, trans and shifting are stronger, smoother and quieter than any other products I have ever used!