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2020 300
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I inherited this 2020 vespa, know nothing about them. I live in a rural area with no mechanics around.
When I take off from a stop there is a squealing noise. It is worse when my wife is with me, it is not her squealing.
Is there some kind of belt adjustment?

Thanks 😊
@seamus26 avatar
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Welcome to the forum!

Shouldn't be. There's no adjustment, really. The clutch and CVT adjust themselves around the belt as you accelerate.

If you are handy, you could take the cover off and watch it while on the center stand. It's not a super difficult procedure.

Keep us posted.

Also, take a quick sweep around and check to make sure all of the nuts and bolts in other places are good and tight. Just good practice, and you might notice something.
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@xantufrog avatar
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How many miles on the scoot? Belt wear is the most likely problem given its young age - over time the springs and plates associated with the CVT can get worn and glazed too, but I just don't see how you'd be "there" yet unless it had a crazy hard year Laughing emoticon so it's surely a simple matter

Be careful talking the transmission cover off because you can crack it (ditto putting it on)
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xantufrog wrote:
How many miles on the scoot? Belt wear is the most likely problem given its young age - over time the springs and plates associated with the CVT can get worn and glazed too, but I just don't see how you'd be "there" yet unless it had a crazy hard year Laughing emoticon so it's surely a simple matter

Be careful talking the transmission cover off because you can crack it (ditto putting it on)
Might as well replace the belt while they're in there, as long as the cover's coming off.

Kind of like buying a used car. You just change the plugs wires and oil as a matter of course.

What size Vespa is it?

Edit ... DUH!
⚠️ Last edited by seamus26 on UTC; edited 2 times
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Welcome to MV, Taezow!
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Chirps or squeals can be from the centrifugal clutch shoes/bell being glazed
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2021 Vespa GTS 300 Super HPE
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Miles and where was it kept?

Sneaky Suspicion is
(1) Dirt / Oil / Lube on Belt or Clutch
(2) Worn Belt - Worn Rollers - Dirty Clutch

also I have seen people lube the Scooter's Variator Boss (where the belt engages) which is a big no-no and should be dry.
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seamus26 wrote:
If you are handy, you could take the cover off and watch it while on the center stand.
Please do NOT do this, unless you have some means of securing the driven axle. There are tales of woe on MV from folk who have tried.
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jimc wrote:
Please do NOT do this, unless you have some means of securing the driven axle. There are tales of woe on MV from folk who have tried.
Fair enough, but perhaps you could elaborate and suggest how he COULD secure the driven axle. It might be helpful.
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jimc wrote:
Please do NOT do this, unless you have some means of securing the driven axle. There are tales of woe on MV from folk who have tried.
Also, if it's slipping (be it clutch or belt) you're unlikely to learn much from just letting it whir without any resistance unless there's something major borked in there that would misbehave even in that circumstance
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seamus26 wrote:
Fair enough, but perhaps you could elaborate and suggest how he COULD secure the driven axle. It might be helpful.
If I really wanted to do this (but I can see no reason why) I would make a slim but strong bracket that would hold a bearing that could take the driven axle. You do not want that axle to slide into the gear case - which it can do by 2-3mm without being restrained. That's not even considering what would happen with the clutch.
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jimc wrote:
If I really wanted to do this (but I can see no reason why) I would make a slim but strong bracket that would hold a bearing that could take the driven axle. You do not want that axle to slide into the gear case - which it can do by 2-3mm without being restrained. That's not even considering what would happen with the clutch.
Ah ... I see that now. I stand corrected and defer to your expertise.

I did not realize that the drive axle bearing was actually in the cover and was ASSUMING it was similar to the GY6 design ... which it certainly isn't.

Thanks for jumping in with the correction.

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jimc wrote:
Please do NOT do this, unless you have some means of securing the driven axle. There are tales of woe on MV from folk who have tried.
Watch a few videos from Robot on the standard belt/clutch service -- he will walk thru the breakdown of the parts and what to look for. Use that as a basis for what to inspect.

Also curious if the squeal happens when it is on the middle stand or just with weight on the scoot from takeoff -- does the squeal go away after the initial power is applied? meaning after the clutch engages does it go away?
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seamus26 wrote:
Thanks for jumping in with the correction.

No worries - I've been led down that garden path myself a couple of times. That's the great thing about MV - enough people contribute that any off-beam ideas get corrected.
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It may just possible be the way you are applying the throttle. If you baby it when taking off, it will glaze up the clutch shoes faster. Try hitting it a little harder and see if it squeals.
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2020 300
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Thanks for all the responses.
It only has 500 miles on it.
It has been sitting for 8 months.
I did put it on the center stand, turned the wheel, and there is a squeak at one point in the rotation. Maybe the rotor is rubbing?
Should I grease it? No no just joking!
The noise is only present at very low speed. Nothing seams loose.
In a couple of months I will transport it to Mesa az, and take it to a shop. Hope it doesn't get worse, or dangerous.
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2021 Vespa GTS 300 Super HPE
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@pegasus_prime avatar
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UTC quote
Taezow wrote:
Thanks for all the responses.
It only has 500 miles on it.
It has been sitting for 8 months.
I did put it on the center stand, turned the wheel, and there is a squeak at one point in the rotation. Maybe the rotor is rubbing?
Should I grease it? No no just joking!
The noise is only present at very low speed. Nothing seams loose.
In a couple of months I will transport it to Mesa az, and take it to a shop. Hope it doesn't get worse, or dangerous.
When the rear disc brake was really hot, the rider held on the brake lever (at a stop light or hill) pressing the brake against the disc in one spot for too long. This causes a slight warp in the disc which causes the high point squeak. Spray brake cleaner in the area and then do a "Breaking in Motorcycle Brake Pads Procedure" (google it) and should not be a problem + don't hold tight on your brakes at a stop.

Another thought is check where the balance weights are on the rim and see if they are rubbing your case when they go around, could be causing the noise as well if it's not the brakes

Note: At a full stop, the rear wheel turn is free turn in the clutch -- meaning the engine and belt are not engaged because they only engage when your engine is running, pull throttle and the clutch speeds up and engages the rear wheel portion of the clutch -- so could not be the belt or the engine squealing if you turned the wheel by hand.
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2020 300
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Pegasus Prime wrote:
When the rear disc brake was really hot, the rider held on the brake lever (at a stop light or hill) pressing the brake against the disc in one spot for too long. This causes a slight warp in the disc which causes the high point squeak. Spray brake cleaner in the area and then do a "Breaking in Motorcycle Brake Pads Procedure" (google it) and should not be a problem + don't hold tight on your brakes at a stop.

Another thought is check where the balance weights are on the rim and see if they are rubbing your case when they go around, could be causing the noise as well if it's not the brakes

Note: At a full stop, the rear wheel turn is free turn in the clutch -- meaning the engine and belt are not engaged because they only engage when your engine is running, pull throttle and the clutch speeds up and engages the rear wheel portion of the clutch -- so could not be the belt or the engine squealing if you turned the wheel by hand.
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