Shimmy speedy 1050

[Stekke]

Hoi,

Meine neu speedy 1050 had last von shimmy. Bij 85 km/u gas losen, un ab 75 km/u begint die front partie uber ungefahr 1cm zu vibrieren. at jemand das och observiert?

Meine dealer hat die lenkkopflager gespannt und das vorderrad balaciert. Hilte nichts. Ich denk das warscheinlich das flyscreen oder dei spiegel die urzache zind. Was denken zie, moglich?

Gruss,

Stefan.

[Psycho]

Hoi,

Meine neu speedy 1050 had last von shimmy.  Bij 85 km/u gas losen, un ab 75 km/u begint die front partie uber ungefahr 1cm zu vibrieren.  at jemand das och observiert?

Meine dealer hat die lenkkopflager gespannt und das vorderrad balaciert.  Hilte nichts.  Ich denk das warscheinlich das flyscreen oder dei spiegel die urzache zind.  Was denken zie, moglich?

Gruss,

Stefan.

<{POST_SNAPBACK}>

Hi Stefan

perhaps it is better to answer in english......

Do you get the shimmy while driving with constant speed, or during hard acceleration periods ?

Do you have the Michelin Pilot Power mounted, or a different tire ?

What about the suspension setting..... it can have bad influence and it can cause such an effect.

regards Psycho

p.s. as far as i know.... the streets in Belgium aren't the best (sorry only a joke)

[frankman]

hi

in what kind of condition is your frond tyre. take a look at the cross section of your tyre. is the outline pointedly or flat? what about the air prssure?

frank

[Stekke]

Yes,

English is easier for me

The problem occurs when I slow down, just let the bike rol from about 85-90, she then starts shaking most at around 70-75 (the end of the bars move about 1cm).

But I also feel the shaking a little bit at contant speed around 70 km/h or accellaration. It's not shaking very hard or dangerous but it is very uncomfortable and really annoying. My 2001 speed triple was always stable (except when I crashed it my friends would say).

Suspension is on stock setting, tires only have 600km on them (it's been very bad weather here the last two months) and it is indead the pilot power that is mounted.

What do you suggest as air pressure for the front tire, I think I now have it on 2.2bar.

I have it on all roads, even super smooth asphalt. Today my dealer balanced the front wheel and adjusted the headnut but both were fine, so no success. I'm indeed thinking that it started when I mounted the flyscreen, strange don't you think.

Thx,

Stefan.

[Daytona Orange]

Hi Stefan ,

i think its easy to test if the fly screen is the reasen for your problem put it away an ride again, but i didn`t think that will be the solution because your problem is not a high speed problem ! the tire is 600km old ? can you change the front wheel with a friend of you ? otherways match the tire and test it again.

no other idear at the moment sorry

regards Udo

[eltron]

What do you suggest as air pressure for the front tire, I think I now have it on 2.2bar.

i dont know the pilot power, but may be this is to low!

increase the pressure to the values you can find at the michelin homepage...

[Psycho]

Hi

have you checked the brake discs..... I had the same problemy years ago.

One disc was damaged and the shaking was feelable only in some driving conditions.

Psycho

[Stekke]

Brake disc seems to be ok. The problem occurs on normal deccelaration,so without using the brakes.

What are you guys running as front tire pressure?

[kneegrinder]

Brake disc seems to be ok.  The problem occurs on normal deccelaration,so without using the brakes.

What are you guys running as front tire pressure?

<{POST_SNAPBACK}>

According to email from Michelin:

Triumph Speed Triple 955i, Michelin Pilot Power:

Strasse (normal road): v/h (front/rear) 2,3 / 2,5

Autobahn (motorway): v/h (front/rear) 2,5 / 2,9

Strecke (Racetrack): v/h (front/rear) 2,2 / 2,0

BTW:

It is very important to balance motorcycle wheels. Wheel wobbles are related to wheel balance in some cases. A properly balanced wheel makes the small shakes go away and the rider will feel more secure at speed. An unbalanced wheel may lead to uneven tire wear and/or a crash.

Hope I did confuse

Greetz from Switzerland

Bearbeitet 12. Juni 2005 von kneegrinder

[Stekke]

Wheels have been rechecked, rebalanced by dealer but the problem is still there.

[kneegrinder]

O.K! Try something else!

This article is in german, but will you give a hint what kind of a problem you got!

Click me

I also searchesd the Internet a bit, a bit of shimmy seems to be normal.

In your case, it looks like you checked already everything:

You said the tyre is has only 600km. The pressure from 2.2 bar seems to be ok.

The front wheel is balanced o.k! The brake disk is o.k.

Well, I don`t know what to help! What about those weights on the handle bar? Changed someting? Anything else on the handle bar has been changed?

Any other sozia?

A la prochaine

[kneegrinder]

Hey, I`m still working on your problem. Found some discussions about it on some other sites:

1.

2.

3.

Or here:

Maschine pendeln bei hoher Geschwindigkeit

Negativweg hinten überprüfen, Druckstufe hinten erhöhen, Zugstufe hinten verringern, Luftdruch kontrollieren

Mangelnde Bodenfreiheit in Schräglage

Negativfederweg vorne und hinten überprüfen, eventuell verringern

Klackernde Geräusche auf schlechter Piste oder beim Bremsen

Lenkkopflager überprüfen, eventuell straffer stellen

Lenkerschlagen im Schiebebetrieb

Luftdruck überprüfen, Negativfederweg vorn überprüfen, eventuell erhöhen, Heckbeladung wenn möglich verringern

Motorrad sehr unhandlich

Negativfederweg überprüfen, eventuell vorne erhöhen, hinten verringern, Luftdruck überprüfen, eventuell erhöhen

Fahrzeugheck schwingt in Schräglage nach, vor allem im Soziusbetrieb

Negativfederweg hinten überprüfen und an Beladung anpassen, Druckstufe hinten erhöhen, wenn alles nicht hilft auf härtere Federn umstellen

Fahrzeugheck fühlt sich straff an, federt bei Bodenwellen dennoch weit durch

Negativfederweg vergrößern, Druckstufe erhöhen, eventuell härtere Feder mit geringerer Vorspannung verbauen

Maschine kippelt bei niedrigem Tempo, lenkt unpräzise ein

Lenkkopflager auf eingelaufene Stellen überprüfen, eventuell lockern, Lenkungsdämpfer weicher stellen

Lenkerschlagen beim Beschleunigen vor allem in leichter Schräglage

Negativfederweg vorn überprüfen, eventuell erhöhen, Zugstufe vorn verringern, Druckstufe hinten verringern, eventuell Hebelei und Schwingenlager auf Leichtgängigkeit prüfen

Voderrad springt beim Bremsen, blockiert schnell

Druckstufe vorn erhöhen, Zugstufe vorn reduzieren, Negativfederweg überprüfen, eventuell verringern, Gabelölstand kontrollieren, eventuell in kleinen Schritten erhöhen oder auf härtere Federn umstellen

Hinterrad stempelt beim Bremsen

Druck- und Zugstufe erhöhen, Hebelei und Schwingenlager auf Spiel prüfen, eventuell neu lagern

Motorrad sehr nervös beim Bremsen

Zugstufe hinten erhöhen, Druckstufe vorn erhöhen, Negativfederweg vorn und hinten überprüfen und korrekt einstellen

Starkes Aufstellmoment beim Bremsen in Schräglage

Luftdruck im Vorderrad überprüfen, eventuell erhöhen, Negativfederweg vorn überprüfen, eventuell verringern, Druckstufe vorn erhöhen

Mit freundlicher Unterstützung: Bikerpeters- Fahrwerkseinstellungen für jedermann!

In conclusion I would say, a lot of other people to have the shimmy. Most of them fixed the proböem wwith:

changing the tyres

changing the pressure of the tyres

wheel bearings or the "lenkkopflager" ( how the f*** you say that in english?)

Yes, yes I know! Still everything in german, but I think is much easier to read a foreign language than to speak or write!

Let us know if you figure out something!

O.k c`est ca. Je ne trouve pas plus, peut etre en francais avec notre compagnos en France?

A bientot

Bearbeitet 12. Juni 2005 von kneegrinder

[Stekke]

Merci beaucoup, danke, thanks for the info, dank u voor de moeite.

Reading german or speaking it is not a problem, I just can't write it very well.

I'll start reading through it, currently I'm suspecting a faulty front tire. Man I'm gutted, a brand new bike and then these problems.

[Stekke]

Well guys, an update regarding my problem.

Tire pressures checked, front wheel balanced, mirrors removed, flyscreen removed and went for a test run.

The bike is still shaking its head about 1cm if I close the throttle at 90 km/u. Is nobody else with a michilin pilot power having the same problem as me? Also when just driving constantly at 90 km/u I feel a little bit of shaking, it is very uncomfortable.

Now I'm suspecting a faulty front tire. Going to the dealer again next weekend.

I love thriumphs, I'm still rebuilding my 2001 speed triple and I planned to keep it next to my new 2005 one. But if this doesn't get sorted I'm going back to japanese scrotch rockets or maybe mvagusta.

Thx,

Stekke.

[Daytona Orange]

Well guys, an update regarding my problem.

I love thriumphs, I'm still rebuilding my 2001 speed triple and I planned to keep it next to my new 2005 one.  But if this doesn't get sorted I'm going back to japanese scrotch rockets or maybe mvagusta.

Thx,

Stekke.

<{POST_SNAPBACK}>

@ Stekke

go to your dealer and change the tire and I´m shure you will sorted out your Problem in one point I´m shure, its not the bike !!! as you see Michelin is not able to give the right Pneus to the Formular 1 Teams in Indy

so stay with Triumph and change the tires

regards ORANGE

[Nr.42]

just change the whole front wheel and you'll know whether it is a problem with the rim or the tire. Normally the pilot power should work fine with the speed triple.

[Stekke]

problem solved, it was a bad front tire. Great work from my dealer.

[triple955]

It is the tyre(100%) ! I had the same problem with the 3rd bt56!