Exhaust Home made beer can exhaust pipe!

Discussion in '2-Stroke Engines' started by fastboy9, Mar 19, 2008.

  1. fastboy9

    fastboy9 Member

    I had already blown the silencer up, and desperately needed to get the bike home from college. Didnt want to lean the bike too much and ruin it, so made a makeshift beer can exhaust pipe!

    I done it by first using a bit of pipe that was slightly smaller than the header pipe, made a small cut going down the pipe, so I could use a vice to slightly crush the pipe making it fit tight. Then this new pipe I used a vice to crimp a the middle of it making a constriction (for backpressure)(similiar to the stock chinese baffles.) then drilled two holes just before the restriction and two after the restriction. At the end of this pipe I inserted a slightly smaller copper pipe to act as a stinger. This didnt fit at first, so I hammered it in. If you wanted to you could drill through where the pipes inserted overlap and put a nut and bolt, or a clip to hold it in place. Next I cut a hole in the end of the beer can for the stinger to fit into, the hole where you drink needed lightly modifiying to fit the pipe into. Then I slid the can on over the pipe. There was quite a gap on the header side of the can so I used some fibreglass wool and stuffed it in the gap nice and tight. As it was college and I wasnt paying for the gasket sealant, I covered this fibreglass with it. I just used some more sealant at the stinger end as well.

    This is only temporary until my racing expansion chamber exhaust arrives, but with a little bit more time and care, I think this pipe could really be a more permanent feature!

    The whole thing was made from waste materials and off cuts! So apart from the dirty, smokey, oily two stroke engine, this exhaust pipe is very environmentally friendly!

    Anybody else made an exhaust pipe? or found another reason to drink beer? check out my beer can air filter too!

    Attached Files:

  2. BoltsMissing

    BoltsMissing Active Member

    That's excelent !
    I have to try that one cos the baffle on mine droped out to.

    But I'll use a Coca Cola can cos the billboard say's, "Things go better with Coke"
    Anyone wanna try Pepsi ?
  3. fastboy9

    fastboy9 Member

    haha yep, if you try red bull it might even give you wings? just a thought ....
    Kage likes this.
  4. [b*tthead] That is the coolest thing I've ever seen. [/b*tthead]

    That really should be a permanent thing.

    Maybe you can sign an ad contract with that energy drink!
  5. fastboy9

    fastboy9 Member

    thanks man! thats really cheered me up!
  6. graucho

    graucho Active Member

    MacGyver, what could you come up with-with a thimble, some thread, and a old whiskey bottle? Hee,Hee. Great job!:grin:
  7. Alaskavan

    Alaskavan Guest

  8. I don't have a pic, but a few years back I used a shaving cream can with excelent results since it is made out of steel, it can be welded. So the end result is extremely durable, probably more than the engine itself.
  9. eltatertoto

    eltatertoto Guest

    nice! i see you used diet coke for yr airfilter. diet coke rocks! wooooo coke! lol you should see my desk full of empty coke cans lol
  10. feelinright

    feelinright New Member

    I'll drink to that!!
  11. Dean

    Dean Member


    Congrats on a great build!

    I wonder though, if it would've been cheaper and easier to build the muffler more like a simplified version of a commercial muffler, like what you'd buy for your car.

    The copper pipe stuck in the "drinking-hole-end" is good for a start, but on the other end, just drill the hole for the header pipe, but offset it towards the opposite side of the can.
    Stick both pipes in as far as you can (leaving some of the copper tube sticking out the other end). If the header pipe bottoms on the end of the can, pull it out about 1" (25mm).
    Weld or otherwise seal the pipes to the can.
    You'll want to muffle it with something. Wrap some fiberglass, or any kind of heat resistant material that has some thickness to it, around the can (don't forget the ends) and then either wrap some tape around the material to help hold it on, or wrap some sheet metal (maybe parts from another can or two?) around the material and seal the seams.

    voila, one muffler.

    If you wanted to get fancy, you could drill a few small relief holes in the side of each pipe and make sure they look at each other, when the muffler's assembled.

    I'm not totally sure that one is any simpler or cheaper to build than yours, but I'm thinking it might be a bit quieter.

    ...that and you get to drink more red bull before you get started on the project (weee!).

    Anyway, nice to see ingenuity reigning supreme.

  12. fastboy9

    fastboy9 Member

    ye good idea! gonna give that a go, much better way!

    update: after about 7 miles though the can went brittle and got loads of holes in it, so I would only reccomend this as a temporary solution, or perhaps use a more robust can, maybe a pressurized one, like a deoderant can. Also perhaps experimenting with aluminium cans and steel cans may yeild different results.
  13. will_start

    will_start Member

    Last edited: Mar 26, 2008
  14. Dean

    Dean Member


    ...and I believe his name is "Will Start". :grin:
    Man, talk about taking it down to its lowest common denominator!
    Half a pop can filled with steel wool and let the gas escape out of the drinking hole.
    As the Guiness brothers would say (in the TV ads) "BRILLIANT!".

    Thanks for posting that Will.


    P.S. my apologies for mistaking "fastboy9" for "feelinalright".
  15. sparky

    sparky Active Member

    DANNGGGG... Dunno how I missed this post. GREAT tip, hotsauce!
  16. Dadkins1

    Dadkins1 Member

    I tried a striaght piece of aluminum tube the other night - about 8" long perfect size for the header hole - I was a little worried about lack of backpressure but that did not seem to be an issue. The issue... Noise. That thing sounded like a full blown 125 motcross engine with an aftermarket LOUD pipe. Utterly obnoxious ! But.... I could noticeably feel the additional power and additional rpm too. It was too obnoxious to leave on so I ended up modifying my muffler opening up the small exits quite a bit and adding an internal baffle. It's a little louder but NOTHING like the staright pipe. I plan to build a pipe soon perhaps I will document the bvuild and post it here.
  17. SimpleSimon

    SimpleSimon Active Member

    Well, I don't drink beer, but I bought a Heineken kegster full and split the cost with the Marine Corps sergeant who lives downstairs. Just so I could have the empty keg, which I've modified into a fuel tank, carefully not obscuring or damaging the labelling. It will be the fuel tank on my trike when I get it finished and motorized.

    The mounting straps are 3/4 inch wide 8 gauge brass, very carefully shaped to the curve of the keg and JB Weld bonded in place. I think it is nice looking, and once in use will be pretty unique. I gotta get some pictures taken of it.