Modern Vespa

Hi everyone. I'm going to buy a used original GS 160 exhaust. What is the best way to clean the inside? I've heard of such things as 'Draino'. Is adding drain cleaner to the inside and swishing around really the best method?
All and any help is appreciated.
nomadinsiam

That's supposed to work, but I've never tried it. You can search on 'DRANO'to get more info.

I did this - worked fine for me & I love seeing FIRE come out the end!

potbelly in the workshop sh#t yeh 8)

Geez, that looks a bit scary. No melting or ill effects? What's going on inside the muffler to clean it when it gets that hot? Do you blow the crud out with compressed air afterwards?

I have cooked a couple drano'd pipes in a fire pit.

It's fun and stinky, in the end I replaced with new or very low mileage used.

The little holes that are part of the baffle system get glogged and cooked solid 'over time'. Very difficult to clear unless you can poke clear as in most expansion pipes with detachable cans and packing.

It's important to have a clear free flowing pipe so you can get good results while, lets say, tuning your carb.

Even something as simple as a proper idle, or adjustment on your air mix can be made much easier with a clear pipe.

My opinion.

(in your case it might be difficult to find a replacement.....so cook away)

+1 on barbequeing the pipe

Thanks gentlemen. I'll give it a try.

I'm just about ready to go ahead with the cleaning. I have a couple questions. Do I pour in the drain cleaner and then cook it, or cook it first and then pour in the drain cleaner? I don't want to kill myself or harm any small children around, like my son. After it's cooked, do I blow it out with compressed air or clean out with fresh water and then blow it out with compressed air?
All and any help is greatly appreciated.

I don't think the draino method is great. you can end up cleaning shit off the walls and blocking up the mesh parts with it. flame the fucker in a stove or on the BBQ. shake all the shit out of it. there will be plenty of shit knocked loose and burnt to ash that'll rattle out. the stove will make the pot a lot hotter than the engine so there will be stuff that couldn't be burnt off by engine heat alone

Ahh, I see, so the drain cleaner and stove firing are two different methods. You don't do them together. Makes sense.