R100GS forks into R80ST or G/S

Tbolt said:

Good to see this completed.

If the GS forks are longer are you using the centre stand from a G/S or ST?

If it is from a G/S does this make it easier to lift on to the stand.

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Tbolt said:

Thanks, I have a ST stand to put on my G/S. Much easier to use. Just need to get the springs right.

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scooter paul said:

For Bush 2 use drawing for Bush 3 but 16.5 mm not 18.3

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scooter paul said:

Fitting R100 GS forks from a paralever model into a ST or G/S frame is relatively straightforward. The steering stem, tapered bearings are the same. The steering stops all line up. I wanted to use my R80G/S wheel and found that drawings exist on the interweb for a custom front axle that fits the larger diameter of the lower fork legs but matches the smaller bearing size of the older wheel. Suitable spacers are included in the drawings though I found out that they are shown the wrong way round.
I’ve used a standard R100GS front calliper as the ST one is fitted to the rear of the leg not the front on the new forks.
I had already used Magura off road master cylinder and a custom hose from Venhill which was just long enough.
Here are some pics. I haven’t ridden it yet but the look is much more purposeful and just what I was looking for.

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sidkn33 said:

Hi Paul, I'm looking to upgrade my ST in the same way, using the original 19" wheel.
What is the source of the custom axle drawings and where did you source your axle and spacers from?

Thanks in advance.

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scooter paul said:

Please send me your email address by personal message and I’ll mail the drawings. I gave them to a pal who uses an engineering firm locally to machine them up.

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