SE "Heavy" Fork Oil
Stellar HDF Member
Joined: Aug 2012
Posts: 2,664
Likes: 184
From: Indiana, USA
I think the 50/50 mix results in 7 1/2 wt (5wt Stock +10wt Heavy)/2=7 1/2 wt. I am running 7.5wt Spectrol in my front and rear. Not sure about adding or subtracting as I followed the manual for exact replacement amounts
Stellar HDF Member
Joined: Aug 2012
Posts: 2,664
Likes: 184
From: Indiana, USA
Found this info for Harley Fork Oil
Fork Oil - 16oz. Type E 5wt. Type E is for "Showa" forks.Part # 99884-80
Fork Oil - 16oz. Type B 10w. Fork Oil - See owners manual for recommended style. Part # 99880-73
Screamin’ EagleŽ Performance Fork Oil - A heavier oil (15wt) provides extra damping in performance application. Part # 99881-87 . Works well to take the dive out of the front end on breaking.
Screamin’ EagleŽ Racing Fork Oil - Designed and blended for the severe conditions on the race track (20wt). Not intended for street use.
Part # 99909-93R
Fork Oil - 16oz. Type E 5wt. Type E is for "Showa" forks.Part # 99884-80
Fork Oil - 16oz. Type B 10w. Fork Oil - See owners manual for recommended style. Part # 99880-73
Screamin’ EagleŽ Performance Fork Oil - A heavier oil (15wt) provides extra damping in performance application. Part # 99881-87 . Works well to take the dive out of the front end on breaking.
Screamin’ EagleŽ Racing Fork Oil - Designed and blended for the severe conditions on the race track (20wt). Not intended for street use.
Part # 99909-93R
Stellar HDF Member
Joined: Aug 2012
Posts: 2,664
Likes: 184
From: Indiana, USA
This is what I used, Spectro 7.5 wt synthetic in both front forks and rear air shocks. Works for me in a glide with 1 or 2 up riding no problems. Paid a little more for synthetic as the distributer made it sound like it was worth it
Road Master
Joined: Mar 2008
Posts: 855
Likes: 1
From: Puyallup, WA
Wow. I guess I never realized the SE HW oil was 15wt. I guess I will go with the Amsoil 10wt, or the Spectro 7.5. Only difference for me is the front end is lowered 1.5" and I'm getting ready to put on a 21" wheel. That combination will make it even stiffer. Probably try the Spectro 7.5 syn. Is it pretty redially available.
Road Warrior
Joined: Jul 2006
Posts: 1,532
Likes: 7
From: Rochester N.Y.
My experience has been nearly the same as yours.
I like what the SE heavy did for the brake dive , but it's a bit much for normal riding.
My bike actually feels more planted at high speeds , or when I push it hard through some turns , athough I'm a very light rider (155 lbs) , maybe it reacts faster because of this.
I will never go back to the E type alone , as I can fully crush the forks on a hard braking.
I will try a 50/50 mix of E type and SE on the next change.
Somewhere between the 2 oils is a sweet spot , it's certainly cheap enough to try different combinations.
Mick
I like what the SE heavy did for the brake dive , but it's a bit much for normal riding.
My bike actually feels more planted at high speeds , or when I push it hard through some turns , athough I'm a very light rider (155 lbs) , maybe it reacts faster because of this.
I will never go back to the E type alone , as I can fully crush the forks on a hard braking.
I will try a 50/50 mix of E type and SE on the next change.
Somewhere between the 2 oils is a sweet spot , it's certainly cheap enough to try different combinations.
Mick
Grand HDF Member
Joined: Mar 2008
Posts: 4,998
Likes: 655
From: bklyn,ny
good article
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
Outstanding HDF Member
Joined: Jul 2010
Posts: 2,187
Likes: 11
From: Ladera Ranch, CA
I ran the SE for about 3000 miles and just didn't like how firm it was. I just changed it out when I did the bar swap and mixed it 50/50 with the stock oil and I like it much better.
Thread
Thread Starter
Forum
Replies
Last Post