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External springs #748496
09/09/18 2:37 pm
09/09/18 2:37 pm
Joined: Apr 2017
Posts: 1
United Kingdom
M
METALMAD Offline OP
New poster
METALMAD  Offline OP
New poster
M

Joined: Apr 2017
Posts: 1
United Kingdom
Good afternoon can anyone offer advice on a external spring modification I am doing on roadholders.Ive got commando sliders(drum brake)with short roadholder stanchions and have got 9 1/2 inch long external springs the problem I have is when they are assembled it’s like the springs are too long as I have to compress the forks to get the top nut on and then it seems as though the stanchions are at there maximum travel and they knock when on the rebound only thing I don’t know is that is the commando slider longer than the pre commando ones.Any help much appreciated


Metalmad
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Re: External springs [Re: METALMAD] #748655
09/10/18 8:34 pm
09/10/18 8:34 pm
Joined: Dec 2004
Posts: 9,963
Scotland
kommando Offline
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kommando  Offline
BritBike Forum member

Joined: Dec 2004
Posts: 9,963
Scotland
You need to know the spring rate of these springs and the gap you are trying to fit them in or how much shorter than 9.5 inches of is. You need some preload so the static day with rider is 1/6 of total travel. If the preload is too much you will top out to soon, too high a spring rate will do same.


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