Adding topout spring
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Road Warrior
Joined: Aug 2020
Posts: 1,303
Likes: 2,145
From: NC
Adding topout spring
1988 FLHTC, wanting to lower the forks just a bit, going to add an additional topout spring (stock length) is my thinking correct, this would increase the current preload of the stock spring?
Club Member
Joined: Apr 2011
Posts: 5,826
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From: SE Louisiana
Never thought of that, which end? The tight wound or the regular wound side?
Thread Starter
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Road Warrior
Joined: Aug 2020
Posts: 1,303
Likes: 2,145
From: NC
Just the length of an extra topout spring, I'd guesstimate about 1.25 inches, my concern is how much it will change the preload of the forks (all stock)
Seasoned HDF Member
Joined: Jul 2014
Posts: 8,625
Likes: 3,388
From: Cental, MI
I cut off the Looser end..for placement under Damper..Dont take much to eliminate "top-out" banging!!
Last edited by Racepres; Jun 6, 2026 at 07:53 AM.
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,960
Likes: 8,056
From: poway
I would not use part of the main spring for an additional top out spring. For 1 when you cut it, the cut side is not flat. It can **** and drag in the fork tube. You can get away with using a cut main by placing the cut side on fork cap side where it doesn't slide.
Club Member
Joined: Apr 2011
Posts: 5,826
Likes: 7,852
From: SE Louisiana
I have some 1" fork lowering spacers for the damper tubes I haven't used yet, don't remember where I got them.
Pro Action has some I see, don't think I paid near that much, hey Max can make you some.
https://street.pro-action.com/store#...it/p/304543172
Pro Action has some I see, don't think I paid near that much, hey Max can make you some.
https://street.pro-action.com/store#...it/p/304543172
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Seasoned HDF Member
Joined: Jul 2014
Posts: 8,625
Likes: 3,388
From: Cental, MI
I have some 1" fork lowering spacers for the damper tubes I haven't used yet, don't remember where I got them.
Pro Action has some I see, don't think I paid near that much, hey Max can make you some.
https://street.pro-action.com/store#...it/p/304543172
Pro Action has some I see, don't think I paid near that much, hey Max can make you some.
https://street.pro-action.com/store#...it/p/304543172
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Club Member
Joined: Apr 2011
Posts: 5,826
Likes: 7,852
From: SE Louisiana
The old air ride springs are soft, might work out not cutting them and run less air, especially with the 1" less travel, that experiment could have that job being done twice though, the price you have to pay to know.
Is this a setscrew?, maybe to keep it in position for an oil hole? The ones I have don't have that, might be better than floating around even if there's no oil hole to cover.
