Primary oil type
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Stage I
Joined: Sep 2017
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From: Spokane, WA
Primary oil type
I have a 2015 1200C, pure stock. I changed the primary case oil using the HD recommended fluid. Shifts great when cold, but once it totally warms up it gets pretty "clunky". It's like the oil isn't holding it's viscosity very well. It did this before I changed the fluid also. What's everybody using in the tranny of their Sportys?
Grand HDF Member
Joined: Sep 2017
Posts: 4,359
Likes: 1,219
From: Dubuque, IA
HD`s F+ is Sae 50. I run Valvoline vr1 sae 50 racing oil. I adjust my clutches then.
Valvoline vr1 20w50 racing oil in the crankcase.
Sure hope any gear oil is gl1 only.
Valvoline vr1 20w50 racing oil in the crankcase.
Sure hope any gear oil is gl1 only.
Last edited by 60Gunner; Sep 19, 2017 at 09:07 AM.
Road Warrior
Joined: Mar 2016
Posts: 1,713
Likes: 299
From: SC
I have a 2015 1200C, pure stock. I changed the primary case oil using the HD recommended fluid. Shifts great when cold, but once it totally warms up it gets pretty "clunky". It's like the oil isn't holding it's viscosity very well. It did this before I changed the fluid also. What's everybody using in the tranny of their Sportys?
Nothing is going to totally eradicate the trademark clunk. How bad the "clunk" is depends on who's listening to it.
If your tranny is in good shape (and I'm assuming it is on a 2-3 year old bike) and you have proper fluid in there, and your clutch is good, and properly adjusted, then it's probably the normal "clunk" you're hearing.
Road Captain
Joined: May 2017
Posts: 559
Likes: 113
From: VA-Nelson Cty
Seems like every bike that I have owned has 'clunked' and all owners complain of it including myself. However, I have to admit that the 'clunk' on my Sportster can be pretty awesome at times, even wearing foam earplugs it is both remarkable and apparently remarkably normal. Sigh.
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FBFletch
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Jun 8, 2006 01:20 AM
