General Category > General Discussion
Fitting a 35mm muffler to a 32mm pipe
normzone:
--- Quote from: moto on October 07, 2025, 10:58:58 AM --- 32mm is about 1 1/4 inch (1.260 vs. 1.25) and 35mm is 1 3/8 (1.375 vs. 1.378)
--- End quote ---
Do some creative engineering with about twenty aluminum beer can walls ...
:popcorn:
PeteS:
I have made my own out of steel and later aluminum on my lathe but I think the EMGO set is your best option.
Pete
moto:
--- Quote from: PeteS on October 07, 2025, 12:12:59 PM ---I have made my own out of steel and later aluminum on my lathe but I think the EMGO set is your best option.
Pete
--- End quote ---
So how have the aluminum ones worked out? Were they simple pipes or did they have a split in them? No problems with differential expansion compared to the steel pipe and muffler? I've got a suitable pipe ready to go that will need a bit of sanding.
PeteS:
--- Quote from: moto on October 07, 2025, 12:19:51 PM ---So how have the aluminum ones worked out? Were they simple pipes or did they have a split in them? No problems with differential expansion compared to the steel pipe and muffler? I've got a suitable pipe ready to go that will need a bit of sanding.
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They lasted over twenty years but I used them on my Norton for original Dunstall Mufflers. Probably less than 20,000 miles. I used solid bar stock and bored it out and tuned the OD to fit. The steel ones were chrome plated. This done back in the ‘70s before plating costs shot into the stratosphere.
These days I am into the K.I.S.S. principle so if you can buy it then buy it.
Pete
bigbikerrick:
I have made my own ,using aluminum flashing material available at most hardware stores. Just cut it to the length you want,and wrap it around the pipe to fill the gap. I also use a smear of clear silicone RTV to further seal the joint,and it makes dis assembly easier too.
Rick
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