Primary Oil?????

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Aug 24, 2011 | 06:57 AM

sgw1064

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Intermediate

Joined: Aug 2010

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Primary Oil?????

I changed primary with syn 20/50 in my 09 883. Using 75/90 instead will quiet shifting but will this cause clutch issues? Anyone try the heavier lube?

Aug 24, 2011 | 07:07 AM

xFreebirdx

Ultimate HDF Member

Joined: Mar 2008

Posts: 7,604

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From: Landrum, SC , elevation 986'

75/90 is the best to use......

Aug 24, 2011 | 07:10 AM

TORQUEY

Seasoned HDF Member

Joined: Aug 2010

Posts: 5,173

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From: East Coast

...and drain that Syn out when you can. Use Amzoil or one of the superior lubricants out there.

Aug 24, 2011 | 07:12 AM

b0fh

Road Captain

Joined: Jun 2008

Posts: 740

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From: Lagoa - VNF

I am using straight gear 90 GL4 for thousands of miles - works much better than motor oil but clutch sticks a bit on cold starts. Opened the clutch recently and it looks brand new, even the spring plate I removed to put 3 discs back in its place.

Aug 24, 2011 | 07:19 AM

cHarley

Club Member

Joined: Feb 2007

Posts: 16,320

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From: Boynton Beach, FloriDuh

Quote:

Originally Posted by sgw1064

I changed primary with syn 20/50 in my 09 883. Using 75/90 instead will quiet shifting but will this cause clutch issues? Anyone try the heavier lube?

The MoCo's preferred recommendation for primary/tranny oil is their Formula+ which is an ~85w Gear Oil. So yes, a 75-90 syn Gear Oil is an excellent choice. I've run Mobil-1 75-90 syn Gear Oil for over 75,000 miles in mine.

Aug 24, 2011 | 07:21 AM

Booey424

Grand HDF Member

Joined: Feb 2007

Posts: 3,945

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From: Letart,WV

I use Mobil 1 75/90 syn gear oil. Shifts just fine. I also use Mobil 1 V-Twin 20/50 motor oil in the oil tank. It also works well

Aug 24, 2011 | 07:45 AM

1200Cdriver

Road Warrior

Joined: Oct 2007

Posts: 1,599

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From: Colonial Beach, Virginia

After having Syn 3 at the 1,000 mile check up, then Amsoil 20w50 at 5,000, I settled on Formula+ at 10,000 and it "seems" to be the quietest and smoothest. 25w60 RevTech tamed some of my engine noise.