Can it damage the motor if I ride with a straight pipe? (or my improvised muffler)

Discussion in 'Intake & Exhaust' started by JJ1, Apr 10, 2017.

  1. JJ1

    JJ1 New Member

    Joined:
    Mar 22, 2017
    Messages:
    25
    Likes Received:
    0
    I have been riding my motorized bike around with no muffler, just the pipe. Is this dangerous? Also, here is what happened to the muffler and here is my provision. I literally took some soda cans and sliced them in layers, then I put some pipe clamps around it. The whole point was to create back pressure, not muffle the sound.

    PICS:
    actual bike pic 1: http://i.imgur.com/Nrk6rjW.jpg
    actual bike pic 2: http://i.imgur.com/MLSGx34.jpg
    muffler that fell off: http://i.imgur.com/SF4rEav.jpg
    improvised muffler: http://i.imgur.com/ex3e6h8.jpg
    straight pipe: http://i.imgur.com/EOVCug7.jpg
    video of running noise: https://www.youtube.com/watch?v=YEcAZ1IGj6E&feature=youtu.be
     
  2. Greg58

    Greg58 Well-Known Member

    Joined:
    May 1, 2011
    Messages:
    2,801
    Likes Received:
    42
    Re: Can it damage the motor if I ride with a straight pipe? (or my improvised muffler

    Other than the noise you can run without a muffler if its jetted right, keep an eye on the plug color to be sure its not too lean. If the engine seems hotter than normal that's a sign of being too lean.
     
  3. JJ1

    JJ1 New Member

    Joined:
    Mar 22, 2017
    Messages:
    25
    Likes Received:
    0
    Re: Can it damage the motor if I ride with a straight pipe? (or my improvised muffler

    Thanks for the advice.
     
  4. Tony01

    Tony01 Member

    Joined:
    Nov 28, 2012
    Messages:
    924
    Likes Received:
    17
    Re: Can it damage the motor if I ride with a straight pipe? (or my improvised muffler

    Not dangerous but needlessly loud and weak. 2-strokes need some exhaust backpressure to run good. Also as said above you'll probably have to riches it up a bit.
     
  5. TheNecromancer13

    Joined:
    Jan 21, 2015
    Messages:
    603
    Likes Received:
    10
    Re: Can it damage the motor if I ride with a straight pipe? (or my improvised muffler

    Not dangerous but the noise will annoy people and you'll lose power.
     
  6. bairdco

    bairdco a guy who makes cool bikes

    Joined:
    Aug 18, 2009
    Messages:
    6,322
    Likes Received:
    4
    Re: Can it damage the motor if I ride with a straight pipe? (or my improvised muffler

    "Losing power" and "2 strokes need backpressure" is a myth, for the most part.

    Before some genius came up with the expansion chamber, race bikes ran megaphone pipes. Loud as ****, but on a tuned engine, caused no problems.

    "Tuned engine" is the key word. A straight pipe, open exhaust, or megaphone, will run much hotter, so you need to tune the whole system to work. It'll run leaner, so jetting, colder plug, retarded timing (which can't really be done with a stock cdi,) and even fuel mixture must be dialed in for maximum effect.

    But on a cheap china, motors often blow up no matter what you do to tune them, so the only real negative effect will be annoyingly loud.
     
  7. BobbyT

    BobbyT Member

    Joined:
    Mar 16, 2014
    Messages:
    163
    Likes Received:
    8
    Re: Can it damage the motor if I ride with a straight pipe? (or my improvised muffler

    I recommend you get a clamp on expansion chamber,made to clamp to your stock muffler pipe. made by bairdco!
     
  8. JJ1

    JJ1 New Member

    Joined:
    Mar 22, 2017
    Messages:
    25
    Likes Received:
    0
  9. ZipTie

    ZipTie Member

    Joined:
    Jan 8, 2016
    Messages:
    687
    Likes Received:
    14
    Re: Can it damage the motor if I ride with a straight pipe? (or my improvised muffler

    That's pretty much a straight pipe that will sound almost like your pop can, but worse. Looks cool though. I'd go stock or get a real expansion chamber.but I could be wrong it will be louder with that pipe. Or a long poo poo pipe, they add a tiny bit of torque and a annoying sound too. Some of the stock pipes must have defective welds or your engine mounts are vibrating too much. I've never had one fail...yet...
    Murphy's going to get me now.lol
     

Share This Page