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Adjusting the front damping..

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PostPosted: 14:45 - 11 Dec 2008    Post subject: Adjusting the front damping.. Reply with quote

My bike has adjuster knobs marked 1234 to adjust the front damping.
Now usually,to make sure there both set the same i would completely unscrew the adjusters,then re-tighten together so i know there both the same.

Well mine dont unscrew to a stop,they just keep turning,so i'm assuming they work the same as a brake/clutch adjuster where they only have 4 settings regardless.(they turn with a clicking sound,but with very little resistance.I would expect a little effort needed to turn them if they only have 4 settings?)

Could someone please confirm this for me please...

It's a 91 gsx750f.

Cheers
Dave
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PostPosted: 16:17 - 12 Dec 2008    Post subject: Reply with quote

B.U.M.P

Anyone?
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Noxious89123
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PostPosted: 23:37 - 13 Dec 2008    Post subject: Reply with quote

Got any pictures of the adjusters? If they don't actually screw in / out, and they only rotate, then i'd imagine that they do only have 4 possible settings, regardless, as you said.

Can't find anything about suspension adjustment for your bike on google etc, so i can't be totally sure. Just trying to work it out logically.
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PostPosted: 01:38 - 14 Dec 2008    Post subject: Reply with quote

I'm assuming they look like this:

https://www.hillsmotorparts.co.uk/ebay_bike_images/large/5082.jpg

But mine have black caps on the top that you turn by hand.(will get a pic tomorrow)

It would be easy to figure it out if i took the tops off,but since my garage got broke into,i'm keeping the bike in the garden so have no tools Crying or Very sad

I'm hoping this will explain the steering wobble when i let go of the bars at speed.
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PostPosted: 01:40 - 14 Dec 2008    Post subject: Reply with quote

I cant physically see anything screwing in or out while turning the nobs,and i would expect them to be a bit harder to turn considering there putting pressure straight on the springs.
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Noxious89123
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PostPosted: 02:14 - 14 Dec 2008    Post subject: Reply with quote

Its the bigger part of those that you turn to adjust preload, that puts pressure on the springs.

The tiny little adjusters in the middle to adjust the damping do some sort of magic regarding valves inside he forks that change resistance.

They look just like the ones on my bike, but they don't twiddle all th way around Confused

/puzzled
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PostPosted: 02:56 - 14 Dec 2008    Post subject: Reply with quote

Quote:
Its the bigger part of those that you turn to adjust preload, that puts pressure on the springs.

The tiny little adjusters in the middle to adjust the damping do some sort of magic regarding valves inside he forks that change resistance.


That explains it then Thumbs Up
Will do a search for info on these valve thingy's Very Happy

Thanks
Dave
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Noxious89123
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PostPosted: 03:19 - 14 Dec 2008    Post subject: Reply with quote

Obviously my bike will likely be different to yours, but forks are forks are forks, so they shouldn't be hugely different. basically what i can gather from my Haynes is;

The big adjuster at the top is preload. The little adjuster in the middle of that, is for rebound damping. There should be another little adjuster widget at the bottom of the fork leg, that adjusts compression damping.

To get the standard settings for my bike, i have to turn them fully clockwise, until they can go no further, and then turn them back out a certain amount of turns. They also have a dot punched into the adjuster, which lines up with a marking on the top of the forks.

When you turn the little damping adjuster, which way are you turning it, and is the preload adjuster turning with it?

In theory, the setting for the preload adjuster depends on its position relevant to the top of the fork. Whereas the damping adjuster has its position set relevant to the preload adjuster.

I'm gonna guess that i've made it sound totally over complicated, put i'll try and draw up a picture to expalin what i mean....

Hope that's of some use to you!

EDIT: Also, i've got some sttings for my bike that i got from this thread. maybe there will be some sttings for your bike in there too? I've not yet had a look, will do in a bit though.

https://www.bikechatforums.com/viewtopic.php?p=1789593
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Noxious89123
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PostPosted: 03:25 - 14 Dec 2008    Post subject: Reply with quote

Pic to be clear;
https://img233.imageshack.us/img233/1305/suspensionadjustck7.jpg

Also, is this what yours look like?
https://www.bikechatforums.com/files/capture_116.jpg

Because that only appears to have 1 adjustment, and guessing from the size of the adjusters, i'd say that those forks don't have any damping adjustment, only preload. It's not a very good picture tbh, so couldn't be sure.
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Noxious89123
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PostPosted: 03:30 - 14 Dec 2008    Post subject: Reply with quote

Disregard that, i suck cocks.

https://www.motorcyclespecs.co.za/model/suzu/suzuki_gsx750f%2090.htm

That there says that your front forks have only adjustment for rebound damping, so that must be what the black adjusters are. I find it odd that they have no preload adjustment, as alot of these bikes seem to have no adjustment, preload only, or preload *and* damping. Not *only* damping on it's own. Meh, learn something new everyday. Will try and see if i can find the standard settings...

*To Google!*

EDIT: Aha!

Quote:
There's a bit of adjustment to play with in the suspension. The forks offer three rebound damping settings while at the back you get a choice of seven different spring preloads and, again, three rebound options.

I rarely fiddle with the suspension on test bikes. They usually arrive with everything set somewhere in the middle of the possible range of adjustment and they usually work damn well. Such was not the case with this Suzook, however. It jittered at the front and while it was not in any sense alarming, the back end felt vague and floppy both flat out in straight lines and laid over in gentle but fast curves.

The forks were easy to adjust with small knobs at the top of each leg and clearly marked datum points. The bike arrived set on "1".

I tried "3" and finally settled for "2" after I'd finished playing around with the rear end.

It's not so easy at the rear end. The rebound is controlled by a sliding knob under the seat which is simple enough to get at. Adjusting the stepped preload collar on the Full Floater suspension unit isn't so great. You can get at it from the lefthand side when the bike is on its centrestand (yes, it's actually got one) if you lie down to the job. The "C" spanner supplied in the toolkit is not that great however and you need to exert a lot of pressure in a restricted space to shift the collar. If the bike were mine I'd get a better tool and I'd also use Copaslip or similar on the collar as its position makes it a prime candidate for rust and seizure.

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Noxious89123
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PostPosted: 03:35 - 14 Dec 2008    Post subject: Reply with quote

PS. You owe me man love Laughing

PPS. Buy one of these, and cherish it. Haynes
https://www.haynes.co.uk/Press/HaynesJackets/RGBhr_2055.jpg

Now that it's coming upto 3am, i should probably go to bed but dammit i'm just not fsking tired. Argh!
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Pete.
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PostPosted: 10:29 - 14 Dec 2008    Post subject: Re: Adjusting the front damping.. Reply with quote

justmetoo125 wrote:
My bike has adjuster knobs marked 1234 to adjust the front damping.
Now usually,to make sure there both set the same i would completely unscrew the adjusters,then re-tighten together so i know there both the same.

Well mine dont unscrew to a stop,they just keep turning,so i'm assuming they work the same as a brake/clutch adjuster where they only have 4 settings regardless.(they turn with a clicking sound,but with very little resistance.I would expect a little effort needed to turn them if they only have 4 settings?)

Could someone please confirm this for me please...

It's a 91 gsx750f.

Cheers
Dave


There's no strict requirement for the adjusters to be set exactly the same. Some bikes have rebound damping on one fork and compression damping on the other.
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Noxious89123
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PostPosted: 15:50 - 14 Dec 2008    Post subject: Reply with quote

From what i could find, his bike only has rebound damping adjustment on the forks, so they should both be set the same.

Thumbs Up Smile
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NiteMare
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PostPosted: 16:28 - 14 Dec 2008    Post subject: Reply with quote

check your rear suspension, air pressure, tyre and linkages ...

do you carry a topbox ?? loaded ??

many wobbles are created from the rear of the bike rather than the front
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Pete.
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PostPosted: 18:10 - 14 Dec 2008    Post subject: Reply with quote

Quote:
many wobbles are created from the rear of the bike rather than the front


Very true. My current bike would shake it's head crossing over-banding and white lines at speed. Cured by fitting a new rear tyre.
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PostPosted: 20:10 - 14 Dec 2008    Post subject: Reply with quote

Cheers for all the info there Noxious Thumbs Up i owe you one (but no can do on the man love thing Laughing )

I tryed turning the adjusters while i was out on a ride today,and to me made no difference at all,but then i'm not really used to these kind of bikes.Maybe i just didn't notice the change.

NiteMare:
I never considered it could be the rear end causing the wobble.
No top-box or anything,but my rear tyre is squared off a bit.Not sure if that could cause it?

Cheers for the reply's Thumbs Up Karma
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Noxious89123
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PostPosted: 00:00 - 15 Dec 2008    Post subject: Reply with quote

I was up at 3am reseaching you bike and i don't even get any karma? Ooh, just you wait.... Your going to be off my xmas card list so fast...

Laughing
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Syx
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PostPosted: 11:50 - 16 Dec 2008    Post subject: Reply with quote

NiteMare wrote:
many wobbles are created from the rear of the bike rather than the front


+1 Thumbs Up A friend of mine had problems with front end wobble - the problem was a slightly squared off rear tyre. Fitting a new one solved the problem!
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PostPosted: 12:29 - 16 Dec 2008    Post subject: Reply with quote

Noxious89123 wrote:
I was up at 3am reseaching you bike and i don't even get any karma? Ooh, just you wait.... Your going to be off my xmas card list so fast...

Laughing


I did give you some on one of your posts Laughing

You cant trade karma in for moneys ya know Laughing

Anyway,there you go i rated all of your posts for ya Thumbs Up
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Noxious89123
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PostPosted: 19:03 - 16 Dec 2008    Post subject: Reply with quote

So... About that manlove... Laughing

Cheers for the karma! Mr. Green
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