Exhaust Insides of exhaust are gone how do I replace?

Discussion in '2-Stroke Engines' started by RadicalxEdward, Aug 29, 2014.

  1. So long story short, one day I was testing the bike and a hear a pop and mettle jangling and the bike exhaust is suddenly louder. Turns out the internals of the exhaust were shot out somewhere. Couldn't find the pieces. I gave up on the bike for a while and now I'm stuck using it. I've got it running better than before but it's loud as heck.

    Is there anything you guys can recommend to make the exhaust quieter until I can buy a new one?

  2. butre

    butre Well-Known Member

    pack it with steel wool and hose clamp a bit of screen on the end. that should last you long enough to get a new one

    if you can weld, look up porter steel-pac mufflers and make that design work
    Randall likes this.
  3. I've heard of using steel wool so I looked it up and it seemed like it was too flammable.

    I was thinking of maybe using ov-gloves instead lol. They don't seem to catch fire. Just didn't know if it would be too much back pressure.
  4. butre

    butre Well-Known Member

    steel wool only burns easily if you put current through it, ambient heat won't light it up
  5. Well I guess it can't hurt to try. Thanks
  6. HeadSmess

    HeadSmess Well-Known Member

    find those stainless scourer pads rather than genuine steel wool. or copper ones. the ones that look like lil springs all tangled up rather than super fine wires. always used to have fun setting them on fire... you know, iron when burning releases more energy than the equivalent weight of timber?
    Randall likes this.
  7. Sorry it's taken so long to update you guys. I took your advice about the steel wool. I got ones with the thickest strands to avoid them catching fire. Haven't had a problem with that. I shoved a pipe through the middle of them to make it so they wouldn't be too restrictive. I then cut a small notch in the exhaust and used a hose clamp on the inside of the pipe (putting pressure outwards instead of clamping inward) with a screen over it to keep everything in. The pressure of the clamp has proved to be enough to keep everything from moving even over rough terrain. It's not quiet by any means but it's not as loud as originally. maybe 30-40% quieter. That's anecdotal though. I haven't actually measured db levels. If you guys care I will though.

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    Randall likes this.
  8. butre

    butre Well-Known Member

    it's also less restrictive than the stock muffler, and looks pretty great. if you want to make it even quieter you can just pack more steel wool in it
  9. Thank you. Hopefully this helps others out as well knowing that the wool won't incinerate in the exhaust. It gets dirty and it may not last forever but it's held up for me andi haven't had any issues with it falling out or anything.
  10. Timbone

    Timbone Active Member

    I think it is wise to also just slam a generic lawnmower muffler on there and take the issue of weight ruining the exhaust studs over time. The entire stock muffler is designed to fail. The insides falling out can maybe be prevented with red locktite, but the overall stress on the exhaust studs will, at the very least, continue to work the muffler loose and, at worst, destroy the studs/ threads. I had experienced more problems with the exhaust than any other system on the motorbike.
  11. Lol you must really have had a hard time. I've seen a bunch of your posts/threads around talking about this. Lol. I feel your pain man. My exhaust studs have held up fine but there's always something wrong with these things. Unless you dump hundreds of dollars into it to replace every crappy piece which kinda defeats the point of these things. If you're gonna spend that much money you might as well buy a production bike/scooter.
    OTP likes this.
  12. butre

    butre Well-Known Member

    it's fine if you use the supplied clamp and don't overtighten it. nobody uses the clamp so a lot of people have problems
  13. Got my kit from bikeberry.com and it didn't come with a clamp for the exhaust.
    OTP likes this.
  14. Fabian

    Fabian Well-Known Member

    I have not experienced any of these issues that you describe.
    OTP likes this.
  15. Fabian

    Fabian Well-Known Member

    Not true.
    The enjoyment of these bikes comes from the fact that they can be built to a sub 40 kilo (90lb) weight and consequently, they still handle in a surprisingly similar manner to that of a conventional bicycle.

    Secondly, you can get these bikes into national parks, because they can be made quiet enough to fly under the radar, where motorbikes are banned by the forestry and wildlife department.

    My bike (just the bike itself) has had around $5,000 thrown at it, and i wouldn't trade it for a scooter or production bike.
    Steve Best likes this.
  16. butre

    butre Well-Known Member

    I like my motorized bicycle because I can take it places I can't take a motorcycle. Have you ever tried to lift a harley over a fence?
    Steve Best likes this.
  17. Fabian

    Fabian Well-Known Member

    Have you ever tried to life a relatively light weight 100 kilo (220lb) 2-stroke dirt bike over a fence or large tree blocking a goat track or trail.
    It's hard enough with 3 people, let alone trying to do it by yourself.

    My motorised bicycle and trailer has taken me to many places that would have been impossible to gain access on a conventional dirt bike, especially if using normal routes patrolled by wildlife & Parks rangers.
    Steve Best likes this.
  18. Timbone

    Timbone Active Member


    I am convinced that the future of transit is two wheels. I have been a bicycle rider and racer all my life so I know what the potential is.

    Too much of our mindset is framed by what I call "carlove". The dominance of the car/truck road infrastructure dominates every decision and plan that people conceive and squashes real creativity and sensible economics. For instance, small motorcycles usually start at 250cc and almost all motorcycle riders describe this as woefully "underpowered". This is why so few motorcycle enthusiasts actually commute via their motorcycle. For them it is all about culture and being seen. Big cars, big motors, big noise- it's all a part of the American mythology.

    Something bad happened to me yesterday: while on the motorbike on a highway with very light traffic, I was "coal rolled" by a gigantic diesel truck. That is to say this guy passed me (I was going 25-28 mph) and he edged over into my lane and let loose a huge cloud of black smoke that engulfed me. F*cking egregious! I am searching for this guy as we speak. I consider it assault. This kind of thing is all a part of the mindset.

    Don't misread my posts about the motorbike! I am just giving honest reports about my learning experience hoping that it can be a help to others. Each car commute to work costs me roughly $5. On motorbike #1, I commuted 31 times;on motorbike #2 14 times. Counting all the other errands and trips near and far, this thing has already paid for itself! I have worked very hard and I continue to learn. I have threadlocker and JB Weld on hand at all times. I carry a small 10mm combination wrench in my rear back pocket.

    I can weld - I used to get paid well to do it!- but I don't have a welder and I really can't afford one (or a Ducati Scrambler!). Man, I can think of ten ways to make something much better and much more reliable than the stock muffler. But it requires good welding. In the meantime, my $12 muffler fix has performed flawlessly. It's actually pretty quiet at cruise speed!

    I am proud to say that my MotoBeast has jumped up to a very high level of reliability. It can be done.

    I'd really like to build my own motorcycle in the Spring, but that requires a higher level of knowledge. I know very little about motorcycle frames or where to procure one. In my mind, I'd like to slap a ~200cc engine on there with a simple gearbox and electric system. Then I'd like to get it all titled and registered, insure it, yeah that is a great idea!

    Thanks for the note and the empathy! If there is anything I can do to help, drop me a note.

  19. Randall

    Randall Member

    Steely Eyed Missile Man :)
  20. Randall

    Randall Member

    Unless you're like me and you like to tinker, and can afford to.