Muffler way too low

Discussion in 'Motorized Bicycle General Discussion' started by HBfisherman, Feb 5, 2010.

  1. HBfisherman

    HBfisherman New Member

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    Well I mocked up the motor last night too see how im going to tackle the front motor mount and I noticed that when I put everything together the muffler is waaaay to low. If I ride over a speed bump it will hit. Is it normal to get a muffler this big, I ordered a Flying Horse kit from BikeBerry. It is literally about 2 1/2 inchs off the ground. What do you suggest I do, other then having to buy a new muffler that go all the way to the back (I think those mufflers make the bike look they are trying too hard to fit into the motorcycle world).

    [​IMG]

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    Sorry about the iPhone pics!
     
  2. Xiodinc

    Xiodinc New Member

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    iphone has a nice camera. Well, you could always torch it, and bend a few degrees up. Mine is somewhat like that, but not as bad, so i just left it.
     
  3. MaxPower

    MaxPower New Member

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    I have a chrome muffler that I bent. It has perminate discolleration and has some surface rust where I heated it. Not sure what will happen to the black paint on yours. you might try finding some tubing and modify your current muffler. good luck
     
  4. marts1

    marts1 New Member

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    It looks as if yours is longer then mine.
     
  5. 2door

    2door Moderator
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    HB,
    Are you a welder or have access to someone who is? Cut the muffler off the pipe and take an inch or two off the pipe and reweld. You'll loose the black paint but it can be touched up with a heat resistant flat black paint, engine enamel or BBQ paint. I like to extend my pipe to the rear. Not so I can look like a motorcycle but because it puts the noise behind me and keeps oil off my pants and rear brakes. You could try it like it is and just avoid speed bumps. Naturally someone is going to suggest replacing the muffler with an expansion chamber style, and that's always an option too.
    Tom
     
    #5 2door, Feb 5, 2010
    Last edited: Feb 5, 2010
  6. Randog707

    Randog707 New Member

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    You can bend it by putting in a vise and using small amounts of presure,or use a torch.Either way its pretty easy to bend.Make sure you dont put to much of a bend because it could restrict the air flow.Both of my MB's I had to bend the muffler,bent them a couple inches,and have not had any problems.If you are uncomfortable with doing this take you bike down to your local muffler shop and they could do it for you for pretty cheap.
     
  7. Salty Gator

    Salty Gator New Member

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    You might try a * poo-poo * pipe....it brings it out further along the frame and away from your foot....numerous vendors here in the forum supply them....I plan on getting one myself.....plus they just look darn cool !....or you can utilize one of Jim's ( Creative Engineering....Manic Mechanic ) motor mounts......it allows you to place your motor in an upright position......thus giving you at least two to three inches of clearance for your muffler ....as well as using his billet intake pipe....a clear shot to the barrel....your frame is an ideal candidate for Jim's parts.....

    Salty.shft.
     

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    #7 Salty Gator, Feb 5, 2010
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  8. wes

    wes New Member

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    I have one that hangs down that low, i have never hit it on speed bumps or anything else, but i pick up the front end while going over curbs and i dont ride of curbs ever!!! Good luck if you put a bend in it, you should still look as good with it being a black pipe.
     
  9. HBfisherman

    HBfisherman New Member

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    By looking at it if I bend it the peddle will hit. I know that after looking into there threads it is best if I mount the motor as low as possible, what if I lifted it a couple of inchs what are my downfalls other than having a tough time mounting the front mount?
     
  10. Salty Gator

    Salty Gator New Member

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    higher center of gravity...chain angle issues.....top bar clearance issues ....and other things......low is good.....high is not....except a muffler......

    Salty.shft.
     
  11. MB-Monkey

    MB-Monkey New Member

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    Looking at your pictures it seems to bit a bit low. I would adjust the angle of the motor so that the carb sits level yours appears to be at a slight pitch. Change the angle until the carb is level and see how much clearance you have.
     
  12. corgi1

    corgi1 New Member

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    I've seen flex pipe on at least one of the builds,,where do we find flex pipe that small?
     
  13. HBfisherman

    HBfisherman New Member

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    Flex pipe for what and where?
     
  14. Salty Gator

    Salty Gator New Member

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    An electrical supply shop......or an automotive supply shop....or raid your mother-in-law's basement for old style conduit.....

    Laughs,
    Salty.shft.
     
  15. Cabinfever1977

    Cabinfever1977 New Member

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    I have a pullstart and centrifugal clutch on my engine so i had to raise my motor,all u need is a custom front mount(like a extra mount block or something).
    My motor clears my peddals and frame and my muffler is around 6"s from the ground.

    So you can either raise your motor,get a new muffler that fits or cut the pipe and add a hose and clamps to move your muffler.
     

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    #15 Cabinfever1977, Feb 5, 2010
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  16. Vistaman73

    Vistaman73 Chat Box Junkie

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    Is it just me (and marts1) or does the muffler look longer. Mine is definately shorter than the one in the picture. is there a difference?
     
  17. K.i.p

    K.i.p New Member

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    Conformity is boring and gets in the way of innovation. I've mounted my motor up and out of the way of the cranks and rerouted the exhaust to a much more rational location. And hey, it looks kind of sexy too! I guess the lower center of gravity issue has some merit but if the human brain can juggle 175 lbs. on top of the seat post I don't think moving the motor up or down a few inches is really going to matter much. Remember you saw this set-up here first.
     

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  18. corgi1

    corgi1 New Member

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    I bet at that height you dont need the chain idler either
     
  19. Salty Gator

    Salty Gator New Member

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    ..Very cool ride....I like how you mounted the tank.....you're probably correct about the engine height....couple inches not making any difference....the pipe looks cool....how's it sound ?

    Salty.shft.
     
  20. K.i.p

    K.i.p New Member

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    Thanks for the kind words. I'm doing this build (my first) over the course of the winter and just taking my time. I have a ways to go before I can fire up the engine and find out how it sounds. I did take a short pedal powered ride a few days ago and it feels nice. I look forward to making an exciting post about my first powered ride. Probably in a few more weeks. The sound is one of things I am most curious about myself as well!
     

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