LOOK Fournales carbon linkage forks
- Thread starter danson67
- Start date
Re-listed Mk 1s on French eBay: (not mine):
http://www.retrobike.co.uk/forum/viewto ... p;t=334964
All the best,
http://www.retrobike.co.uk/forum/viewto ... p;t=334964
All the best,
Fournales mk 3 stem
Hi all, so a bit new to the retro MTB scene but have been building up a couple of GT STS DS 1000, and learning lots along the way. I have a lovely set of mk3 cobra forks, indicated on the serial they are a medium. Now, going from the Look manual, these are the correct size for the GT STS, with a 113 head stock, and with the headset stack its 140mm. However, the stem is only 28.9 at the top for 37mm of its length, before it slims down to 27.1mm diameter (why?), and just wont line up properly in the headset. The crown race for an EC34 works, as does the top, but you cant just use spacers as the stem narrows, so moves freely side to side in the upper bearing. I've attached a picture for reference. I can extend the crown I think, with a wolf tooth lower extender for 10mm, and a white industries stack is about 30mm, but seems a strange design, as the other admitted limited experience I've had with fitting forks have just a straight tube. Well...actually the other fournales mk 2 i have had the strange screw on top part. But that at least seems to work as a medium on the same frame. Any ideas?
Hi all, so a bit new to the retro MTB scene but have been building up a couple of GT STS DS 1000, and learning lots along the way. I have a lovely set of mk3 cobra forks, indicated on the serial they are a medium. Now, going from the Look manual, these are the correct size for the GT STS, with a 113 head stock, and with the headset stack its 140mm. However, the stem is only 28.9 at the top for 37mm of its length, before it slims down to 27.1mm diameter (why?), and just wont line up properly in the headset. The crown race for an EC34 works, as does the top, but you cant just use spacers as the stem narrows, so moves freely side to side in the upper bearing. I've attached a picture for reference. I can extend the crown I think, with a wolf tooth lower extender for 10mm, and a white industries stack is about 30mm, but seems a strange design, as the other admitted limited experience I've had with fitting forks have just a straight tube. Well...actually the other fournales mk 2 i have had the strange screw on top part. But that at least seems to work as a medium on the same frame. Any ideas?
Attachments
necrotrackin
Retro Newbie
Re: Re:
For sure you are totally correct with it.
ferrus":ex69inhe said:
For sure you are totally correct with it.
Looking at what you have & the manual, I would have gone with the small size. The earlier screw top is a lot more forgiving regarding head tube length.
This is mine & it still needed a spacer with the small mk2. https://www.dropbox.com/s/xsvvuslurgtgk ... I.jpg?dl=0
This is mine & it still needed a spacer with the small mk2. https://www.dropbox.com/s/xsvvuslurgtgk ... I.jpg?dl=0
Unfortunately, it looks like the Cobra, with the integrated stem is a bit different to the standard Mk3.
Looks like it's designed for a fixed length of headtube + headset stack, with no adjustment.
The steerer slims down to save some weight, maybe 30g, but causes you some hassle.
As you know, the standard Mk3 has an adjustable top section on the steerer, which screws up and down to preload the headset and spacers.
The Mk3 fork was supplied with a selection of spacers, including one long enough to bridge the gap across that chamfer.
To sort yours, you need a custom shim made that will take up the slop between the headset and steerer.
It would need to be a 2-part split shell that is then bonded onto the steerer before it's inserted through the headset.
It's nothing structural, just needs to make op the space and not fall off into the headtube.
Fairly simple turning job: 28.6 external, 27.1 internal and around 30mm long, split axially into 2 parts, I could make that for you:
You could then use standard 1-1/8" spacers to fill the stack height up to the base of the stem if the stem has enough float to compress down the steerer.
If not, you'll need an adjustable spacer to pre-load the headset. The ABR Float (around £
, comes in a couple of length ranges and would be in keeping with the CNC look of the fork:
All the best,
Looks like it's designed for a fixed length of headtube + headset stack, with no adjustment.
The steerer slims down to save some weight, maybe 30g, but causes you some hassle.
As you know, the standard Mk3 has an adjustable top section on the steerer, which screws up and down to preload the headset and spacers.
The Mk3 fork was supplied with a selection of spacers, including one long enough to bridge the gap across that chamfer.
To sort yours, you need a custom shim made that will take up the slop between the headset and steerer.
It would need to be a 2-part split shell that is then bonded onto the steerer before it's inserted through the headset.
It's nothing structural, just needs to make op the space and not fall off into the headtube.
Fairly simple turning job: 28.6 external, 27.1 internal and around 30mm long, split axially into 2 parts, I could make that for you:
You could then use standard 1-1/8" spacers to fill the stack height up to the base of the stem if the stem has enough float to compress down the steerer.
If not, you'll need an adjustable spacer to pre-load the headset. The ABR Float (around £
, comes in a couple of length ranges and would be in keeping with the CNC look of the fork: All the best,
Attachments
Carbon Lynk
Retro Newbie
Hi
Just acquired what i believe to be a MK2 Look Fournales fork, probably the only one in Australia.
So obviously I need to build a bike around the fork, circa 1996 I believe.
Any suggestions on frames that would suit the fork, duelly with 80-100mm would be awesome, but interested in the hardtail option as well.
Photos if you you got them
Thanks from AU
Just acquired what i believe to be a MK2 Look Fournales fork, probably the only one in Australia.
So obviously I need to build a bike around the fork, circa 1996 I believe.
Any suggestions on frames that would suit the fork, duelly with 80-100mm would be awesome, but interested in the hardtail option as well.
Photos if you you got them
Thanks from AU
Carbon Lynk
Retro Newbie
Wow
That is spectacular
Exactly what I had in mind
A XC bullet
That is spectacular
Exactly what I had in mind
A XC bullet
