primary oil ??
primary oil ??
so i just changed my primary oil from what dealer had in there which seem to be alot thicker of oil and i put some s&s primary oil gold bottle in that seems alot thinner and now she slips 
would the dealer put formula+ in there?
would the dealer put formula+ in there?
Seasoned HDF Member
Joined: Sep 2009
Posts: 17,145
Likes: 6,166
From: SE Michigan
Seasoned HDF Member
Joined: Jan 2007
Posts: 20,616
Likes: 4,440
From: anacoco, la
do a clutch adjustment. if you used specific primary oil, you shouldn't have a slipping problem. if the dealer used formula +, it is about the same viscosity as a 50wt motor oil.
if you do an adjustment, and still have a slipping problem, i would drain the s&s and try either formula +, or shell rotella t 15w-40. it is jaso rated for wet clutch use. but logically thinking, if your clutch was working fine before, and now it isn't, then either your clutch is out of adjustment, or the oil is not compatible.
if you do an adjustment, and still have a slipping problem, i would drain the s&s and try either formula +, or shell rotella t 15w-40. it is jaso rated for wet clutch use. but logically thinking, if your clutch was working fine before, and now it isn't, then either your clutch is out of adjustment, or the oil is not compatible.
do a clutch adjustment. if you used specific primary oil, you shouldn't have a slipping problem. if the dealer used formula +, it is about the same viscosity as a 50wt motor oil.
if you do an adjustment, and still have a slipping problem, i would drain the s&s and try either formula +, or shell rotella t 15w-40. it is jaso rated for wet clutch use. but logically thinking, if your clutch was working fine before, and now it isn't, then either your clutch is out of adjustment, or the oil is not compatible.
if you do an adjustment, and still have a slipping problem, i would drain the s&s and try either formula +, or shell rotella t 15w-40. it is jaso rated for wet clutch use. but logically thinking, if your clutch was working fine before, and now it isn't, then either your clutch is out of adjustment, or the oil is not compatible.
Trending Topics
Supporter
Joined: Jan 2007
Posts: 15,788
Likes: 5,621
From: along the shore of Mishigami
Wow, an 80W140 weight gear oil in the primary? I saw that on the bottle and I'm kind of surprised. In cold climates that would be as thick as molasses in the clutch plates.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Road Master
Joined: Jul 2016
Posts: 870
Likes: 246
From: Transfer, PA
Gear oils are numbered differently from motor oils. 20w50 motor oil is roughly the same viscosity.