The front and rear wobble and weave are coupled and it is difficult for most mortals to soth out the cause and effects, so I think what I'm finding out is when all else fails measure the sag first and go from there.
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Getting a GS 1000 S to handle
- Thread starter John Kat
- Start date
The front and rear wobble and weave are coupled and it is difficult for most mortals to soth out the cause and effects, so I think what I'm finding out is when all else fails measure the sag first and go from there.
This was also confirmed by my local dealer who works a lot on off road bikes.The front and rear wobble and weave are coupled and it is difficult for most mortals to soth out the cause and effects, so I think what I'm finding out is when all else fails measure the sag first and go from there.
"Many riders complain about front end wiggle when in fact it's their rear suspension that's reaching maximum extension"
In the meantime I've ordered RaceTech springs for the front fork...
Wait and see ?
V
voivod
Guest
Racers are a different breed to road riders.
member reading about 2 different racers..1 set his bike up plush ...plenty of supension travel. 1 had his rock hard...both were at the top of the proffession.
The hard supension masked the fact that the stock frames of the time weren't stiff enough...so the frame itself flexed . This gave some suspension too.
The other guys frame was welded up...so was stiff as a stiff thing.
Neither liked the others bike
Also remember racers dont need to worry about potholes and sh*t roads ..or passengers or luggage.
Everyone rides different so some like stuff some dont. I like a wee bit loose...probably gives my brain less to think about ..lol
I finally got my RaceTech front springs rated at .9kg/mm.
To get the sag in spec, I cut a 65 mm spacer and installed the springs with no further modification.
The sag ended at 28 mm somewhat less than the previous std setting with 1kg/cm2 that I was using.
The result is a bit of good news bad news mix.
The good news is that the front end feels very reassuring in small to medium speed bends by providing good feedback from the front tyre grip.
The bad news is that the weaving is back in some special cases like my favorite downhill sweeper at 140 to 150 km/h...
Next step is to increase the sag by cutting the spacer down to 55mm.
Here's a picture of the three springs used so far:
Standard GS 1000 EC with long spacer, standard GS 1000 ST with short spacer and RaceTech.
To get the sag in spec, I cut a 65 mm spacer and installed the springs with no further modification.
The sag ended at 28 mm somewhat less than the previous std setting with 1kg/cm2 that I was using.
The result is a bit of good news bad news mix.
The good news is that the front end feels very reassuring in small to medium speed bends by providing good feedback from the front tyre grip.
The bad news is that the weaving is back in some special cases like my favorite downhill sweeper at 140 to 150 km/h...
Next step is to increase the sag by cutting the spacer down to 55mm.
Here's a picture of the three springs used so far:
Standard GS 1000 EC with long spacer, standard GS 1000 ST with short spacer and RaceTech.
Nice work ! Keep us posted on your results. I have not read this thread in a while and cant remember all you have tried to fix the weave. Ive tried numerous avenues with mixed results. None have corrected my weave. My last adventure was with a couple guys on Gixers. We all entered a big sweeping rt hand freeway-on-ramp wheel to wheel to wheel. As we entered the freeway we all accelerated up to triple digits. By the time I thought about shifting to 5th the Bike started to feel loose and the Gixers were long gone...
Thanks for the support!I understand the frustration...Nice work ! Keep us posted on your results. I have not read this thread in a while and cant remember all you have tried to fix the weave. Ive tried numerous avenues with mixed results. None have corrected my weave. My last adventure was with a couple guys on Gixers. We all entered a big sweeping rt hand freeway-on-ramp wheel to wheel to wheel. As we entered the freeway we all accelerated up to triple digits. By the time I thought about shifting to 5th the Bike started to feel loose and the Gixers were long gone...
The good news is I know there is an answer.
It's my GS 1000 XP equipped with GSX R 1100 K suspension,wheels and brakes but with an unmodified frame.The unknown is what makes the difference? The fork, the geometry with 17" wheels or the rubber???
Here's a picture
All three but the main step up comes from the radial tires (with the wide rims) and stiffer side walls.
With my ED, the suspension ( 88 GSXR 1100 wheels/forks and Bandit swingarm) is good enough that I think the primary limiting factor is now frame flex.
H
HaggisHombre
Guest
Just thought I would ask why RaceTech v Progressive?
I believe progressive springs are better for street use and while I'm not racing my bike (yet?) I wanted to reduce the amount of variables as much as possible and thus went for a fixed rate.
Any other opinion?
VERY GOOD NEWS!
I solved the roadholding issue of my GS 1000ST
As you may recall from my previous posts, I had changed almost everything on the bike but the weave that developped at high speed only went away when the quarter fairing was taken off
When I took the bike out yesterday, it reminded me that the front fork was really ****ty.
On large bumps no problem but all the little ones went straight into my wrists.
I had also noticed previously that the forks on my GS 1000 EC, on the contrary, would move up and down very fast when the road got rough...
Bear in mind that I had rebuilt both forks and I saw no reason for a difference between the two sets...except that on the GS 1000 ST I had to change one of the fork legs that was slightly bent.
As I believe you can't get the OEM legs anymore, I bought a replacement part that interestingly enough doesn't have a "bushing" at the bottom.
In any case just to make double sure, I swapped the fork legs from one bike to the other today and believe it or not: the WEAVE is GONE!!!!
As a few members pointed out before, it must be a question of stiction in the forks.
The lesson to all this is, is that it's difficult to find a fault when you believe you had already eliminated the cause in the first place
I solved the roadholding issue of my GS 1000ST
As you may recall from my previous posts, I had changed almost everything on the bike but the weave that developped at high speed only went away when the quarter fairing was taken off
When I took the bike out yesterday, it reminded me that the front fork was really ****ty.
On large bumps no problem but all the little ones went straight into my wrists.
I had also noticed previously that the forks on my GS 1000 EC, on the contrary, would move up and down very fast when the road got rough...
Bear in mind that I had rebuilt both forks and I saw no reason for a difference between the two sets...except that on the GS 1000 ST I had to change one of the fork legs that was slightly bent.
As I believe you can't get the OEM legs anymore, I bought a replacement part that interestingly enough doesn't have a "bushing" at the bottom.
In any case just to make double sure, I swapped the fork legs from one bike to the other today and believe it or not: the WEAVE is GONE!!!!
As a few members pointed out before, it must be a question of stiction in the forks.
The lesson to all this is, is that it's difficult to find a fault when you believe you had already eliminated the cause in the first place
