homemade silencer / spark arrester

[Ben]

I need to make a silencer.

Was thinking of wrapping fiberglass around a length of copper tubing I drill holes through....any suggestions?....Copper ok to use?.....anything better than fiberglass to muffle sound

[Alan H]

Weren't copper exhausts or exhaust components banned for some reason many years ago?
Can't remember why though.

[Ben]

Ended up rolling a perforated flat mesh with about 5mm holes throughout. Tube is 3/4" wrappedin fiberglass and fine steel whool.

Results are ok I guess, not super quiet and power is still ok. I had to adjust for low idle a bit too.

$3 investment vs ebay suzuki $90+....done for now.

[Ben]

...small update. the fiberglass and steel wool wasn't much of a sound deadener.

Have since packed the silencer with ROXUL insulation from HOME DEPOT......noticeable difference, much quieter! Seemed to improve over time as well, perhaps getting saturated.