home made exhaust for hf 2.5

I finally got my homemade exhaust pipe mounted on the trike today. It's a very basic version. The main tube is 12" long and 1 3/4" diameter. The inlet tube sticks into the main tube about 4". It is welded shut on the end and has many 1/4" holes drilled into the sides of it. After the inlet tube the rest of the main tube is filled with 4 of the stainless steel scrubbies used for washing dishes.

The spring loaded idler pulley is working well on the engine chain too. The other one I had on there kept trying to bind the chain.

It's not a whole lot quieter but it cut out pretty much all of the high frequency sounds and the little 2.5 hp engine now sounds like a regular 4 stroke motorcycle engine.

Lee B

http://www.packratworkshop.com/pics/eng-l-01.jpg

http://www.packratworkshop.com/pics/eng-l-02.jpg

http://www.packratworkshop.com/pics/eng-r-01.jpg

Now if I could just figure out how to make a quiet one!

GearNut said:

I use a used moped muffler. It works extremely well.

Click to expand...

That's what I wanted to use but the local shop wanted as much as a new one costs and I'm on a very tight budget. I might eventually get one though as this is still louder than I would like. It actually sounds like a much bigger engine due to only the low frequency stuff coming out. That's still better than the pocket bike muffler sounded though.