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VXL 125
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I was driving home this afternoon and someone stopped me to say my muffler looked loose. I had a look when I got home and it looks like it is completely missing the two attaching bolts!

How bad is this? The scooter is brand new, has about 80km on the clock. I had already booked the first service for Friday this week. I'm inclined to drive the scooter carefully the 8km or so to the garage rather than get it picked up, but how upset should I be about this - if the garage just bolts it back up is everything ok or is it possible the whole setup has been damaged by driving around on bumpy roads like this?
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I'd replace the bolts before riding it at all, as the pipe can snap from the weight of the muffler. If you must ride it, at least zip-tie the pipe to support its weight in the original position. A new pipe isn't cheap!
@madison_sully avatar
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@madison_sully avatar
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Don't ride it until the bolts are replaced. You're putting all that torque on the other end of that pipe.
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I just watched Robot (scooterwest.com)install a new muffler and he was careful to say that after the muffler had been heated up a couple of times to carefully check that all of the bolts were still tight. Even watching that, I did not think to check my new Vespa with 400 miles.
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How bad is this? Un-ridable but not bad.

...if the garage just bolts it back up is everything ok or is it possible the whole setup has been damaged by driving around on bumpy roads like this? Most likely its fine if you are not hearing any loud noises or seeing any exhaust leaks.

It looks to me like the dealer did a crappy job prepping the bike before selling it. Those bolts should have been checked with a torque wrench. It is pretty much hanging on by the exhaust manifold bolts so that area needs to be inspected.
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I think it's entirely possible one of the exhaust studs could have sheared snapped under the strain. Which wouldn't be fatal or anything, but it wouldn't be fun to fix, either.
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LX190 Friday afternoon special, [s]Primavera[/s], S50, too many pushbikes
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I see an awful lot of blue sharpie.
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I wouldn't ride it until repaired. The engine heats up and when turned off cold air may enter the exhaust and warp the valves.
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Weird 80's Vespas & Cool Vintage Lambrettas
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As they say south of the border, that's not bueno.

Bolt it all back up with correct fasteners and check your exhaust studs at the head. If nothing broke you lucked out.
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Bad, I lost one on the cannonball and the resulting leak of hot air melted my wiring harness. Do not ride it until you replace them.
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Do NOT drive it no matter how carefully.
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UTC quote
For the OP. Let's say he doesn't have spares of the now missing bolts. What are his options?

1. Get a ride to the dealer who will give him a set of bolts? Take them home and install.
2. Use a smaller bolt,nut,washer to hold the muffler weight on the 8km drive to the dealer. Or use a piece of wire to support?
3. Get the dang dealer to come get the scooter and transport it back to the shop.
Or much better more experienced ideas?

PS. Anti-seize on the new nuts?
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@greasy125 avatar
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UTC quote
Billrush wrote:
For the OP. Let's say he doesn't have spares of the now missing bolts. What are his options?

1. Get a ride to the dealer who will give him a set of bolts? Take them home and install.
2. Use a smaller bolt,nut,washer to hold the muffler weight on the 8km drive to the dealer. Or use a piece of wire to support?
3. Get the dang dealer to come get the scooter and transport it back to the shop.
Or much better more experienced ideas?

PS. Anti-seize on the new nuts?
1- sure
2- no, absolutely not. you'll damage the case, no wire either the whole assembly is being supported by the exhaust studs. need the bolts to secure it and not snap those off.
3- yeah why not. I mean, that shouldn't happen... so there's an argument there.

frankly, this is a common size so you could hit the hardware store and come up with what you need to make it work and get down the road. but really, the correct fastener is, well, correct. so I'd buy online or hit the dealer unless you have a kick ass hardware store locally.
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greasy125 wrote:
1- sure
2- no, absolutely not. you'll damage the case, no wire either the whole assembly is being supported by the exhaust studs. need the bolts to secure it and not snap those off.
3- yeah why not. I mean, that shouldn't happen... so there's an argument there.

frankly, this is a common size so you could hit the hardware store and come up with what you need to make it work and get down the road. but really, the correct fastener is, well, correct. so I'd buy online or hit the dealer unless you have a kick ass hardware store locally.
I resisted a zip tie suggestion! I should have suggested it so you could throw something at me! Cheers.
@seamus26 avatar
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UTC quote
I had those same bolts loosen up on me. Loosen, mind you. Not fall out. Loose enough that it did crack the pipe up near the flange bolts.

Definitely fix it right before riding.
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UTC quote
seamus26 wrote:
I had those same bolts loosen up on me. Loosen, mind you. Not fall out. Loose enough that it did crack the pipe up near the flange bolts.

Definitely fix it right before riding.
Ok, thanks seamus26. That comment finally got me out of my chair and into the garage. The bolts on my 2021 Sprint 150 with 400 miles are not loose.
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Using spring washers helps.
OP
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VXL 125
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UTC quote
Thanks all!

The dealer is picking it up tomorrow, although I did enjoy the zip tie suggestions. I'll make sure they inspect the other end of the pipe.
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2007 GTS
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UTC quote
Topolino wrote:
I'd replace the bolts before riding it at all, as the pipe can snap from the weight of the muffler. If you must ride it, at least zip-tie the pipe to support its weight in the original position. A new pipe isn't cheap!
don't use zip ties on a hot muffler, they will melt.

use metal wire.
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