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Old Nov 3, 2025 | 12:01 AM
  #1  
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1981FLH
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From: Darwin
Default Progressive Shocks

Happy Monday everyone,
I purchased a set of 12” 412 progressive shocks & fitted them to my FLH I’ve bolted them on as per instructions set the sag & the bike is definitely lower it scrapes the mufflers on bends & the shocks are going full travel on bumps.

I’m struggling for ideas & answers.
 
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Old Nov 3, 2025 | 03:19 AM
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What length shocks did you remove? I believe stock is 12.
I assume 412`s have at least a spring preload adjustment ?
What do the "directions" advise?
Are you a large unit ?
 

Last edited by eighteight; Nov 3, 2025 at 03:24 AM.
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Old Nov 3, 2025 | 05:36 AM
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Originally Posted by eighteight
What length shocks did you remove? I believe stock is 12.
I assume 412`s have at least a spring preload adjustment ?
What do the "directions" advise?
Are you a large unit ?
I removed the original 12” 44 year old shocks, I’ve ridden the bike at all 5 preload settings, I’m 85kg so not a large unit, instructions are pretty basic in regards to what fittings & setting sag etc.
 
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Old Nov 3, 2025 | 05:44 AM
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I removed the stock 12`s, substituted used set 13" O.E. air shocks
A bit of a struggle to get them on .
Ride is CONSIDERABLY improved
price was right
`79 FL 80kg.

 
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Old Nov 3, 2025 | 08:01 AM
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Default oops

I just ran down to the garage an measured my '82 model. I have the wheel off and the swingarm hanging and mine measure 13.5" center to center of the bolt hole. Not 100% sure they're original but they definitely look it.
Sorry, had to edit. You have FLH I have an FLT. Please disregard.
 

Last edited by chizzler; Nov 3, 2025 at 08:04 AM. Reason: I'm an idiot
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