Sound Deadening Procedure, Test, Results

[Jesse Marshall]

So with the goal if making the 2 stroke motor quiet as possible ill be doing some sound reduction mods. First one was stuffing just a little bit of fiber glass in the muffler and that worked to reduce the sound significantly. Next I have this plastic sound dampening material for the clutch an I'll let you know how that goes. I often search google for results of mods on these motors so this may be a source for people in the future so please feel free to share your ideas on this subject here and post links to other threads on similar subjects.

 

[Potato_In_Exhaust]

You're gonna have to prove it with one of those decimal meter reading thingy. But yes, keep us up to date with your experimentations as I want to find a way to quiet my beast as well.

 

[bairdco]

Best thing I found to dampen the noise in the clutch case is Plasti-coat spray paint. It's simple, thin, and cheap. Just spray the inside of the covers and you're done.

 

[sbest]

Good suggestion for the gear noise, I have to try it.

A lot of noise comes from the intake. Making a covered filter box quiets it down.

Short lengths of high heat silicone tube shoved between every second cylinder fin will get rid of a lot of the "ping". A long length of that silicone hose off the muffler tailpipe will quiet most of the exhaust noise.

I tried corplast (voting sign material) panels on either side of the motor and it really quieted it down, as well as hid the motor.

 

[MEASURE TWICE]

I've seen motorcycle using the high heat silicone between fins on the cylinder, was wondering what it was for.