primary oil ??
Seasoned HDF Member
Joined: Jan 2007
Posts: 20,616
Likes: 4,440
From: anacoco, la
that is one of the uses that they are selling it for. though for the price, i think i would go with something a little cheaper in the primary. your'e just gonna dump it in 5k anyway, and full synthetic is just overkill for that application.
Road Captain
Joined: Jan 2006
Posts: 704
Likes: 45
From: Western Washington
I've tried so many different oils in the primary after the last 25 years and the best performing by far is HD Formula+. I'm an Amsoil guy in the trans. and engine, but Formula+ all the way in the primary. This is on Evo's, Twin Cams and the M-8. Nothing shifts better or has a nicer release than Formula+.
HDF Community Team
Joined: Nov 2012
Posts: 6,189
Likes: 2,418
From: USA
Ok. So probably slightly over full, but not hugely so. Your clutch isnt swimming in oil.
If youre sure your clutch is adjusted right, and therefore fully clamping when released, its almost assuredly a fluid problem. Which I find surprising, but not unbelievable.
One other is that youve a worn clutch that was barely holding, and the new fluid tipped it over the point. Cant recall if you said anything about the clutch being new or not.
If youre sure your clutch is adjusted right, and therefore fully clamping when released, its almost assuredly a fluid problem. Which I find surprising, but not unbelievable.
One other is that youve a worn clutch that was barely holding, and the new fluid tipped it over the point. Cant recall if you said anything about the clutch being new or not.
Seasoned HDF Member
Joined: Feb 2008
Posts: 22,999
Likes: 11,439
I ride year round in Wisconsin. Zero and below not uncommon and 10 degrees to 40's is fine . We did ride in 20 below this last winter for half the day. I had the same thing on my mine you do. It just did not seem to effect anything.
Stellar HDF Member
Joined: Aug 2007
Posts: 2,052
Likes: 341
From: Virginia Beach
I only use Amsoil 15w-60 (which I can't say there was a performance difference in from the 20w-50) or 20w-50. You can leave the synthetic in there for 10k with no problems. I've tried a bunch, years ago we ran type F in the primary. 20w-50 in all three holes just makes it too easy.
Last edited by jammerx; Apr 8, 2020 at 11:53 PM.
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