04-01-2022, 05:36 PM | #1 |
Join Date: Aug 2021
Posts: 58
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New muffler was $8
I replaced the massive straight-pipe muffler on my son's 125cc with an 8HP lawnmower muffler. It sounds good, nice and deep and still loud, but not as loud as it was. Also shaved off a couple of pounds. I think the stock muffler was oversized and overloud to appeal to young boys.
Oddly, I had to upsize the idle jet. This violates what I thought I knew about backpressure. The bike seems at least as powerful as before. The new muffler is $8 on amazon. I tried a different model lawnmower muffler (see the pic) but it sounded awful. https://www.amazon.com/gp/product/B002EP9RS0 |
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