Vintage Vespa Forum

Cleaning carbon from muffler.

AutoShrine Sponsor
AutoShrine Sponsor

ralbelt Ralph Beltrami
West Warwick, RI, USA   USA
I have a vintage Vespa , but I am also working on a 1978 Yamaha LB80. I believe the muffler has a build up of carbon, I have removed it , power washed it inside , cooked it in a gas grill 450 degrees, sent it to a commercial sand blaster had the inside blasted as good as possible, soaked it for 2 weeks in a bucket of diesel and cooked again. Next step is to cut it open and weld it back together if I cant think of what else to do. Anyone have any other sugestions.?

. Hide banner ads & support this website by becoming a > Gold Supporting Member <
enigmas Avatar
enigmas Vince Stok
Melbourne, Victoria, Australia   AUS
That's a lot of effort...what are you trying to accomplish? If you want a more free flowing exhaust system for more performance then look at the available/suitable expansion chambers for the engine. The OEM mufflers are nothing sophisticated once you've cut one open and taken a look inside. Note though, that changing back pressure on a 2 stroke will also alter it's fueling requirements, so you may/probably have to alter the carb jetting, primarily the main jet size.

. Hide banner ads & support this website by becoming a > Gold Supporting Member <

To add your reply, or post your own questions

Registration is FREE and takes less than a minute!

Having trouble posting or changing forum settings?
Read the Forum Help (FAQ) or contact the webmaster

Join The Club

Sign in to ask questions, share photos, and access all website features

Your Scooters

1962 Lambretta TV 175 Series 3

Text Size

Larger Smaller
Reset Save

Sponsor Links