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Motorized Bicycle Trouble Shooting Use this area to post problems that may arise that you could use some help in figuring out what is wrong with their bicycle motor and what needs to be done to achieve top performance.

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  #1  
Old 10-09-2009, 06:53 PM
all_thumbs all_thumbs is offline
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Default Muffler Issue

Hello All:

Just got done with a build, or so I thought. Upon attempting to mount the muffler, I noticed it gets in the way with the left pedal. Other than bending the heck out of the muffler tube, does anyone know if there is a small compatible muffler on the market for these engine kits?
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  #2  
Old 10-09-2009, 07:45 PM
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Venice Motor Bikes Venice Motor Bikes is online now
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Default Re: Muffler Issue

What kind of bike??
Is the pipe also hitting the frame???
Older Schwinns have narrow cranks & I usually just buy a new crank for $10.
Road bikes have narrow cranks too. You can also just swap the cranks for some from a mountain bike.
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Last edited by Venice Motor Bikes; 10-09-2009 at 07:50 PM.
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Old 10-09-2009, 11:45 PM
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2door 2door is offline
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Default Re: Muffler Issue

I'd want to know how bad is the pedal is hitting the muffler. Some of the kit supplied mufflers require a slight bend in the pipe to clear the pedal/crank. If there is just minor interference, 1/4" or less then you should be able to clamp the pipe flange in a vice and tweak the pipe just enough to clear. Some guys have had luck drilling the flange mounting holes out to allow for some minor adjustment. If the interference is excessive then replacing the crank with a wider one will be your best bet. Another option is fabricating a custom exhaust system which can be difficult without pipe bending and welding equipment.
Tom
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Old 10-10-2009, 12:55 AM
all_thumbs all_thumbs is offline
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Default Re: Muffler Issue

The bike I am using is a Road Master generic 26" Mountain Bike and I am loooking at about a half inch overlap. Replacing the crank seems like the most practical way to go. Thanks for the replies.
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Old 10-10-2009, 02:26 PM
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Default Re: Muffler Issue

Is the pipe also hitting the frame?????
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