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ivanSun Apr-03-05 03:58 PM

  
"commando fork shortening"


  

          

Can anyone help!.Im building a 1954 fetherbed hybrid,i have a perfect set of late commando forks and a newly rebuilt commando front wheel.Can i shorten the forks from 23" to 21 7/8" like the short roadholders on the dommi.Any help from u guys will be great thanks

  

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RohanSun Apr-03-05 04:47 PM

  
#1. "RE: commando fork shortening"
In response to Reply # 0


  

          

Someone will probably pop up and say it can be done, but I'd suggest there are just too many problems.

For starters, the fork internals give a (claimed) 6" of fork travel, which is too much if fitted to a featherbed - the front wheel would hit the frame ?. Limiting the fork travel would require re-engineering the damper system to all work with shorter travel, not too simple.
Shortening the fork tubes involves cutting a few inches out of either the top or bottom - re-tapering and re-threading the top would be expensive if a machinist has to do it. Cutting the bottom just might be combining with reworking the damper system - or using dominator damping. And cutting the springs to suit.

Maybe you could raise the rear suspension to match the chopper look of the std length commando front end on a featherbed ?

I'll be interested in other replies. I looked long and hard at this, and decided finding a featherbed front end was more cost effective.

  

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ivanSun Apr-03-05 05:08 PM

  
#2. "RE: commando fork shortening"
In response to Reply # 1


  

          

Thanks for your input Rohan.Ive seen tritons with commando front wheels so they must have commando fork sliders for the caliper.Im just wondering if i could use dommie fork tubes,damper and springs?

  

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dynodaveSun Apr-03-05 06:48 PM
Member since Mar 18th 2009
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#3. "RE: commando fork shortening"
In response to Reply # 0
Sun Apr-03-05 06:52 PM by dynodave

  

          

My 63 atlas came with a commando front end.....

I did this job about 3-4 years ago- so IIRC

The ride height of the forks comes from the damper body length and the spring length.
Commando and domi springs are the same length

To get the featherbed ride height with the longer commando damper bodies you need to shorten the springs...


The fork length determines wheither it tops out or bottoms out within the fork leg.
I ended up putting domi fork staunchions and about 1" over stock damper rods to retain long fork travel.

The stock domi's have shorter than commando fork travel.

It now has normal ride height and good fork travel with TLS brakes.

Remember the TLS uses a UNF brake cable and not the CEI thread cable adaptor/adjuster.

added:
OOPS you did say caliper so forget the cable business OK

dave

  

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ivanMon Apr-04-05 12:58 PM

  
#4. "RE: commando fork shortening"
In response to Reply # 3


  

          

hi dave this is what i wanted to know thanks.But one question you say you used 1" over stock dampers,were they the commando standard dampers or some sort of fabricated overstock dommie dampers.Sorry about the picky questions but i want to be very sure i can do this befor i go ripping a perfectly good set of forks apart

  

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dynodaveyTue Apr-05-05 11:29 AM

  
#5. "RE: 1" over damper RODS"
In response to Reply # 4


  

          

The bodies are stock commando length

  

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ivanWed Apr-06-05 03:21 PM

  
#6. "RE: 1" over damper RODS"
In response to Reply # 5


  

          

sorry to sound thick dave ,so your saying commando damper bodys atlas tubes,atlas spring length?,commando rods cut to one inch over atlas length? have i got that right?

  

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dynodaveyThu Apr-07-05 01:28 PM

  
#7. "RE: 1" over damper RODS"
In response to Reply # 6


  

          

I used commando bodies, atlas damper bodies are shorter than commando

shortened springs

I made NEW longer damper rods...not necessary for you.
commando and atlas damper rods the same except for thread form

domi fork tubes, if you use commando you will likely bottom out

stock commando and atlas springs are the same
I cut mine to lower the front end while retaining the commando damper bodies.


  

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