Quieter muffler?

SeattleMike · #1 (**permalink**) 03-25-2008, 10:26 PM

Does anyone know of a quieter exhaust setup? I don't want to wake up my neighbors at night when I come home at 12am.

Also, I'm using a 16:1 gas/oil ratio like my instructions said for the break in period, will I get a decent power boost when I go to 20:1 after the break in?

**CRUISER** · #2 (**permalink**) 03-25-2008, 10:44 PM

i did and you will feel difference in power when it breaks in. norman made me a custom exhaust for my bicycle engine that is very quite untill you go full throttle then you get a nice deep sound. its awesome

SeattleMike · #3 (**permalink**) 03-26-2008, 04:38 AM

Could you post or email a picture, or more info on this quiet exhaust setup? I'm interested in making one myself, or buying one from someone.

**Bikeguy Joe** · #4 (**permalink**) 03-26-2008, 06:03 AM

Mike, how about exploring aftermufflers?

They can be made out of nearly anything....use your imagination. I've seen 'em made from fiberglass stuffed drink cans to silicone bulbs with holes all around them.

I'd run a tank of 16/1 then go to 20/1 for a few tanks then go to at least 24/1. Personally, I run 30/1 in the older bushed engine, 32/1 in the bearing engines.

SeattleMike · #5 (**permalink**) 03-27-2008, 06:40 AM

Sounds like a neat idea, making one out of a beer can or something. I use ceramic wool to insulate my woodstove chimney, maybe I could use that. I'll give it a try next time I feel like getting creative!
Would wrapping my existing (stock) exhaust pipe and muffler with ceramic wool or fiberglass insulation quiet it down a bit?

deacon · #6 (**permalink**) 03-27-2008, 07:19 AM

I'm thinking lawn mower muffler at the end of the stock one... might be interesting.

**Bikeguy Joe** · #7 (**permalink**) 03-27-2008, 07:28 AM

Quote:

Originally Posted by SeattleMike

I'll give it a try next time I feel like getting creative!

Would wrapping my existing (stock) exhaust pipe and muffler with ceramic wool or fiberglass insulation quiet it down a bit?

That would definitely be worth experimenting with.

I tried to make a muffler when I was a kid and we filled a tobacco can full of steel wool and stuck it on the 2" stub of broken head pipe on my friends Indian 100cc dirt bike.....instant fire!

Do not use steel wool.

**Bikeguy Joe** · #8 (**permalink**) 03-27-2008, 07:31 AM

Quote:

Originally Posted by SeattleMike

Sounds like a neat idea, making one out of a beer can or something.

Better use a 24 oz. can, or two.

**Bikeguy Joe** · #9 (**permalink**) 03-27-2008, 07:36 AM

Other ways to quiet the bicycle motor kit are to-

Place rubber blocks between the cooling fins on the head and cylinder.
If you experiment with a better air filter/box you could quiet any two stroke nicely.
Make sure you have proper lube and tension on your drive chain-3/4".
Secure all "sheet metal" such as fenders, chain covers, reflectors, seat springs, or anything else that can vibrate and make noise.

SeattleMike · #10 (**permalink**) 03-27-2008, 04:36 PM

Anybody have cool ideas how to make an airbox? Will you post pictures of your own custom airbox? Maybe I'll make one out of a budweiser can- just poke holes in it and insulate it with something.
Do 2 strokes usually make noise because of sound going out the airbox?