copmagnet80cc
New Member
I just got an expansion chamber for my motorbike and it doesn't have a muffler on it...bad idea right? I was just wondering if anybody has any designs for a cylinder shaped muffler that could fit on my new exhaust.
Homeade muffler?
- Thread starter copmagnet80cc
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MotorBicycleRacing
Well-Known Member
kinda hard to answer your question without knowing what expansion chamber you got?
maniac57
Old, Fat, and still faster than you
Attach a 8'' length of pipe the same size as the exhaust to the end, drill it full of holes, slip a bigger pipe over it, fill the inner area with fiberglass matting or stainless steel potscrubbers, cap the ends with about an inch of the pipe with holes sticking out the back.
Look at scooters and pocketbike silencers for ideas. I'd simply buy a used pocketbike silencer and add it.
Look at scooters and pocketbike silencers for ideas. I'd simply buy a used pocketbike silencer and add it.
copmagnet80cc
New Member
kinda hard to answer your question without knowing what expansion chamber you got?
Its a small bannana expansion chamber. its got about a half inch exhaust tip to it
Agreen
Member
Maniac hit the nail on the head. I made a resonator for my Rx7 that way because I couldn't find one that fit my application. I needed a very specific length, but I wanted as much sound dampening as possible. It's actually very easy, and can be made quite inexpensively. I also like that I can make it bulletproof too, since the Rx7 is known for extreme exhaust heat and afterburn so intense that I've seen it blow mufflers to pieces!
MotorBicycleRacing
Well-Known Member
There are several 'banana" pipes with some of them having a baffle inside so they really aren't an expansion chamber.
The banana pipes don't have enough header distance to the chamber.