Modern Vespa

Hello, I'm fairly new to vintage vespas and therefore I don't really know what is and is not considered normal.
So when I put my 125 Gran tourismo R into the first gear with the clutch pulled and roll it forward or backwards with it, it makes this gear noise and I don't know if its actually bad or normal..

Here is a video I took when rolling it forward and backwards (with 1st, 2nd and 3rd gear). The microphone was fairly close to the gearbox so it might sound a little bit overexaggerated.

So I looked at other videos with vintage vespas driving and they all do the same noise as mine does when driving. I noticed this noise with the first gear with the clutch pulled only today, so I thought that was something not right.
I'm always going into 3rd gear because I need to runstart it, since the kickstarter is worn out and not working. And the 3rd gear doesn't make this noise. But I noticed that the clutch doesn't rotate the engine as it did the last times I runstarted it, It's sort of.. grinds and turns the engine only 1 or 2 times, when before it rotated it a couple of times when starting. But sometimes it does what I need (rotates the engine couple times).

With the clutch pulled in, it shouldn't make any noticeable noises.

I'd say it's time to split the cases and replace the kickstart stuff and check your cross/gear shims/ rear axle alignment. I had a rear axle out of alignment and and it would make noises with the clutch pulled in, in gear.

Noises from lower engine. Replaced bearing & axle

Thanks for the reply! The topic you linked me helped me out alot!

So when I go into first gear with the clutch pulled it makes this very similar sound to the one you showed in this video:

Is that normal gear noise? And what gear were you spinning this in?
Thanks for any answers in advance!

Also, could you tell if something is not right? I thought that the constant noise it does is the flywheel, but looking further into it it started to sound like the inside of the engine.

Help!

That's how the gears sound if the cases are open. I don't recall what gear it was in. The big thing I was trying to highlight was that with everything spinning, it didn't abruptly stop like in my first video.

Unfortunately I can't tell anything from the video. Poke around and see if the flywheel is rubbing on anything/anything is loose.

Where are you located?

Tomorrow I'll try to take off the flywheel cover and start it up for a sec.
My concern is that rust built up inside the engine after the 13 years it had been sitting (it sat in a shed, not outside). Can it be? That rust built up inside?
Also I'm from Austria

No rust inside since its aluminum cases. I would start by draining and refill the gear oil and see what condition its in. If there's gas, water, cork, rubber in it you'll be able to tell what condition the internals are in. To be safe I'd personally do a full rebuild since it was sitting for years- seals, clutch corks, kickstart buffers, shift cross, gaskets.

When I drained the oil it seemed pretty normal. I'll also take your advice and rebuild it just to be sure as well.
And thanks for the help!

If you have no oil in it and didn't find anything out of the ordinary you might hold off and look elsewhere. Have you verified that everything is secure and not vibrating?

I also tried the same test you did in your first video (clutch pulled in, rocking the bike forward/backwards) and I got similar noises to yours but not that loud. You might try tightening up your clutch cable and see how the noises sound. If the clutch disengages it might make less noise.

So today I tested the bike and it could be the flywheel which makes that noise. When the engine revs up the noise goes away, but in idle or low rpm its here. I think the vibration makes the flywheel jump just a tiny bit every revoluiton and rub against some metal towards the middle, which might make that noise. I'll make a slow motion recording and see if it actually is the flywheel.
But everything else sits tight. My phone was actually really close to the gearbox and it has a sensitive mic, maybe thats why it sounds loud. It's far quieter when walking next to it.

I'll leave the video here, in case you know what sound it could be. But it could also be the crank bearing. Or the clutch.
In neutral no clutch pulled, normal idle + rev.
Also I heard some misfires. Could it be the coil? or something else?

Here it is in slow motion with the black bar indicating where this hitting noise is.

But it's not hitting the casing if you're wondering. I took it off and it still did that noise.

/bump

Do you have pics of your scoot?

By any chance is said Vespa Gran Tourismo R a VBB ex SEA Or DanMotors?


My concern is that rust built up inside the engine after the 13 years it had been sitting (it sat in a shed, not outside). Can it be? That rust built up inside?

to me it sounds like a stuck clutch.... After that time its likely all the plates are stucktogether.

Can you drive it?
If so, what do you notice while riding?

The last video sounds like a Vespa

Unfortunatly my phone broke, so I can't provide any photos atm.
And unfortunatly I don't know about the motortype of this vespa, I only know it's a 1971 GTR motor, but thats about it.
But I can drive it. It doesn't behave abnormal at all. Only things I noticed is that it vibrates alot during idle and has this constant "hitting/rubbing" noise where the flywheel or crankcase is.

if it is rubbing on the flywheel cover, or anywhere externally, there WILL be a shiny area where it rubs.

I've listened again, the noise comes from inside. It might be the clutch or a little bend crankshaft, not sure. But it also could be the broken kickstarter. I'll let you all know what the problems were as soon as I recieve the owner manuel to this vespa and take it apart.

Thanks alot for all the replies!