Sun Jul 25, 2021 7:52 am

Enthusiast
Rally 200, Jet 200, TV 175 (two of them), Li150, GTS 250
Joined: 27 Dec 2012
Posts: 84
Location: Toronto, Ontario, Canada
 
Enthusiast
Rally 200, Jet 200, TV 175 (two of them), Li150, GTS 250
Joined: 27 Dec 2012
Posts: 84
Location: Toronto, Ontario, Canada
Sun Jul 25, 2021 7:52 am linkquote
Just to report. Gtv 250ie with 7,000kms. Changed stock tires to Pirelli Sport Demons and added a top case. Headset wobble appears. Changes made close together

Wobble starts with deceleration. engine or brake. Our rough Toronto roads makes it worse.


Changed front and rear shocks. Verified tire balance. Verified brake disc's are true. Added heavier bar end weights. Verified no play in wheel nor headset bearings.

Wobble still there.

I just increased tire pressure to 30 / 36 psi F/R.

Wobble noticeably reduced. Enough it's manageable.

Going to leave the top case on as it's handy yo store the helmet and gloves when parking.

David

Last edited by davidsquaredson on Sun Jul 25, 2021 2:12 pm; edited 1 time in total
Sun Jul 25, 2021 8:13 am

Petty Tyrant
GTS250 GTS300 MP3 500
Joined: 11 Oct 2005
Posts: 31452
Location: Bay Area, California
 
Petty Tyrant
GTS250 GTS300 MP3 500
Joined: 11 Oct 2005
Posts: 31452
Location: Bay Area, California
Sun Jul 25, 2021 8:13 am linkquote
This is a very common phenomenon when adding a top case, and in some cases when switching tire brands. Did you add larger bar-end weights with the top case? Doing so will dampen the wobble somewhat.
Sun Jul 25, 2021 9:33 am

Molto Verboso
2016 Sprint S 150, 2016 Sprint 150, 2006 GTS 250, 2006 GTS 250, 2012 GTS 300, 1974 Vespa 150 Super
Joined: 21 Oct 2016
Posts: 1055
Location: Vermont
 
Molto Verboso
2016 Sprint S 150, 2016 Sprint 150, 2006 GTS 250, 2006 GTS 250, 2012 GTS 300, 1974 Vespa 150 Super
Joined: 21 Oct 2016
Posts: 1055
Location: Vermont
Sun Jul 25, 2021 9:33 am linkquote
When I put a Givi 47L topcase on I installed the large bar end weights. These weigh in at about a pound. (453 g) Helped considerably
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