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@dowxxmoto avatar
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200 GT L
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New Vespa owner here. Bought a 2004 Vespa 200 GT L for my college aged daughter. I was riding it and noticed it has a head shake around 30 mph on decell if you hold the bars loosely. Is this a characteristic of Vespas or do I have something going on?

If you accelerate hard through 30 mph, you dont really even notice it. But when decellerating, if you hold the bars loose, or let go, you get a pretty noticeable headshake around 32-30mph. The tires that were on it were shot, so I changed the tires, but the headshake is still present. Seems slightly better with the new tires.

Any help is appreciated!
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Normale.

It's more common on the GTS than the GT (in my opinion) but all the modern Vespa large frames have it, and have always had it.

It's generally not dangerous, as long as you've got at least one hand on the bars.
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Veni, Vidi, Posti
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Do you have a box on the back? Are there any handlebar weights on the scoot ?
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Yes it has a box on the back. I did a search and saw some other posts on here about it. I feel better knowing its a common issue. I will tell my daughter to make sure she keeps her hands on the bars!

Thanks for the responses!
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This is her ride. I thinks its pretty cool. I have been riding it around a good bit playing with it. I may have to buy one for myself.
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Dowxxmoto wrote:
This is her ride. I thinks its pretty cool. I have been riding it around a good bit playing with it. I may have to buy one for myself.
That was my first scooter, too. Same color. I had the weird seat with the snakeskin panels on the side (for no apparent reason) but it was otherwise identical — even had the matching top box.

I loved that scooter.
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2019 GTS300 Supertech E3 57,000km
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2019 GTS300 Supertech E3 57,000km
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as mentioned above, make sure you have the handlebar end weights. they help. (normal to install them when adding the top box)
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Hooked
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I've experienced it on other bikes but not on my GTS, UNTIL I added the Givi top case.
I can still decel without touching the bars, but it does start the wobble now.
I've no previous experience on Vespa, but if it is like my other bikes, the wobble gets worse with tire wear.

That's a nice looking ride she has. Sounds like you have been bitten too. Please post photo when you get yours Razz emoticon
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Clampett wrote:
I've no previous experience on Vespa, but if it is like my other bikes, the wobble gets worse with tire wear.
True for the GT/GTS Vespas - a new tyre almost eliminates the wobble for a few hundred miles.
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It's normal for a GTS to wobble some. The GTV wobbles less in my opinion.

Most of the weight is in the rear with the engine and the case kinda adds to that.

I added the new style heavy bar weights which were are one piece, and replaces the lighter ones, that reduced the wobble a lot. My local shop had the old style bar weights, those black ones, which would be added onto the existing bar end weights, so I put those on too! Just needed a 100mm screw!

Very very stable.

I ride on freeways a ton, and also have larger wheels and wider tires. The weights help in the city as well.
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Veni, Vidi, Posti
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where are located in SC?
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I have the heavy bar weights on both my GTS Vespas.
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Molto Verboso
Piaggio Beverly 300 ie - 2012
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I drive a 2012 BV 300 and this wobble I thought was something my BV does not have. At least I never experienced it.

But yesterday I was doing some 70km/h (44mph) and I was decelerating for a curve and took my left hand from the steering bar to have a little scratch at the chin holding the bike only loosely with the right hand and all of a sudden at 50km/h (30mph) I felt this wobble.

I checked this a couple of times and when decelerating each time exactly at this 50km/h there is the wobble. Below nothing, above also nothing. It is only in a very narrow speed range.

But with both hands on the steering wheel there is absolutely nothing.

I have the topbox and the bar weights.
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jimc wrote:
True for the GT/GTS Vespas - a new tyre almost eliminates the wobble for a few hundred miles.
This has been true for me.
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Molto Verboso
Piaggio Beverly 300 ie - 2012
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Guzzi Gal wrote:
This has been true for me.
A new front tyre, I guess?
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Gigi, '13 GTS 300ie Touring
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PeterCC wrote:
A new front tyre, I guess?
It may only improve the issue for a few hundred miles. If your tire still has life left, it would be an expensive fix for the short term. I bought my scoot with a flat, so I didn't ride it before purchase. New tires were installed the next day and the wobble appeared at around 1000 miles. When it's time for a new set, I will make note of the front end behavior and go from there.

I find that running the front above 30 psi decreased the wobble a bit. Add a pound of pressure to the cold tire before a ride. Pay attention to the wobble when decelerating each time you adjust the pressure. You may find a sweet spot where it doesn't bother you. Keep in mind, if you carry extra weight via shopping or a pillion, the wobble may change in how it manifests. However, you may find the wobble doesn't bother you once you get used to it.
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Guzzi Gal wrote:
However, you may find the wobble doesn't bother you once you get used to it.
And don't take your hands off the bars to check if the wobble is still there!
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The more weight on the back, the more pronounced the wobble gets. I got the bright idea of putting an eight gallon fuel cell on the back of my GT200, and when it started the head shake of death, I was not sure I could control the bike any more. One of the last times I've been riding that I was truly scared. Braked it down, crawled back to the shop and drained out most of the gas.

The heavy bar end weights do help a lot, sp does the correct tire pressure. Filling the bars with birdshot, then adding the weights would help even more. there's something called a barsnake that is used on MCs for this, but you can't put it on the Vespa because of the way the mounts for the end weights are welded in.
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UTC quote
of course you can do what i did ...

ride too fast on bad roads too often bottoming out the front suspension plenty. this has damaged my steering bearings so that if feels like they are 'notched' in a straight ahead position.

but not recommended
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Tierney wrote:
where are located in SC?
I am in Florence but the Vespa will reside in Rock Hill
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steelbytes wrote:
of course you can do what i did ...

ride too fast on bad roads too often bottoming out the front suspension plenty. this has damaged my steering bearings so that if feels like they are 'notched' in a straight ahead position.

but not recommended
Yeah not going to do that, but maybe some bungee cords from the bar ends to the front of the seat, kind of a budget steering dampner Laughing emoticon
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