Front tire to help stayibility gs750

[Guest]

I have a 90 90 19 on front.
Would going to a 100 90 19 help with stability?
Slight head shake 90ish MPh now.
Also tire is 12_15 year old. And sit low for a while.
And what's the correct psi for the forks. 81 gs750e.
Thanks

[hillsy]

Are you saying your tyre is 12 to 15 years old? And sat flat for some time?

You need to replace that. Probably immediately.

[JJ]

Are you saying your tyre is 12 to 15 years old? And sat flat for some time?

You need to replace that. Probably immediately.

If not sooner!

[mmattockx]

Also tire is 12_15 year old. And sit low for a while.

Since the front tire is prehistoric, how old is the rear tire? This would be a good time to drain the fork oil and replace the fork springs with some Sonic springs of the correct rate, as well.

Are you saying your tyre is 12 to 15 years old? And sat flat for some time?

You need to replace that. Probably immediately.

I don't know if immediately is soon enough. I wouldn't ride the bike again until the tires were changed out, but that's just me.


Mark

[roeme]

(...)Slight head shake 90ish MPh now.
Also tire is 12_15 year old. And sit low for a while.

...and all you can think of is changing tire dimensions? Are you trolling?

[greg78gs750]

...and all you can think of is changing tire dimensions? Are you trolling?

my thoughts exactly, srsly?

[bwringer]

The correct front tire size for your bike is 100/90-19

And yes, replace that old hunk of crap tire immediately.

The correct pressure to run in the forks is "none" -- install a set of Sonic fork springs in the correct spring rate and with fresh fork oil.


Instability can have many overlapping causes, so a new front tire in the correct size and fork springs will help, but may not fix the problem entirely. It's quite likely you also need steering stem bearings, and you could also have problems in the front end that are actually caused by the rear end -- a bad rear tire, shocks, and/or swingarm bearings.

[81gs7501166]

I'll order a new tire today. Benn looking at perilly.
Any advise.
Neck bearings and swing arm replaced when built.
Only got mabe 1500 miles on them.
Tires look good no dry rot. Been in basement

[sharpy]

Tryes are stuffed, get a matching set. Get great advice BEFORE u buy a tyre. dont just put any old thing on it. maybe some Bridgestone Battlax BT45 High Performance Tires. 100/90 x19 front and 120/90 x18 rear

[roeme]

I'll order a new tire today. Benn looking at perilly.
Any advise.
Neck bearings and swing arm replaced when built.
Only got mabe 1500 miles on them.
Tires look good no dry rot. Been in basement

Alright, as soon as you've got proper new tires on - balanced and inflated properly - you'll have eliminated most of the causes of head shake. The only other things I can think of would be the wheel bearings. Though when it comes to head shake my experience is limited to aforementioned causes.

[81gs7501166]

Front tire in and it's bout to be hung on a cherry picker!

[81gs7501166]

It's on. Feels much better.
No bounce.
Much improved grip.
Rear is next.
Do these 81 gs750 wheels require tubes?

[RichDesmond]

Alright, as soon as you've got proper new tires on - balanced and inflated properly - you'll have eliminated most of the causes of head shake. The only other things I can think of would be the wheel bearings. Though when it comes to head shake my experience is limited to aforementioned causes.

Once you get past tires, wobble issues are more commonly caused by problems at the rear of the bike, with worn shocks leading the list.

[Gorminrider]

and bikes can easily have slightly bent-misaligned stanchions from a prang or drop. I just pranged a bike into the side of a u-turning Pickup truck so I'm learning ins and outs of this lately....
it's a good idea to check alignment of wheels

[81gs7501166]

Front tire on,had it to 100,no shake.
Rear 120 is hear, hope to install today, taking off a 130.