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High Performance Bicycle Engine Tips and Motorized Race Bicycles We all want our bicycle engines to push our bikes faster. Get exclusive engine modification tips and suggestions from us. Also check out some of our racing members builds

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  #1  
Old 07-30-2011, 10:37 PM
msrfan msrfan is offline
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Default 54 Schwinn 24'' DX My Next Race Bike

Here's some of the stuff I may use for a race bike I'm building. Nothing special. Old cruiser frame and my usual moped parts along with a weed wacker type motor. Haven't totally thought it out yet but it will look similar to my other racer I ran at Willow Springs only the next size down. Trying to break into a smaller class. After seeing scotto racing all day in multiple classes, I should be able to do a couple.


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  #2  
Old 07-30-2011, 10:41 PM
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Goat Herder Goat Herder is offline
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Default Re: 54 Schwinn 24'' DX My Next Race Bike

This looks interesting I like it so far! Nice hubs and everything.
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  #3  
Old 07-30-2011, 10:55 PM
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MotorBicycleRacing MotorBicycleRacing is offline
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Default Re: 54 Schwinn 24'' DX My Next Race Bike

Looking good as usual.
What are the specs on that motor?
I presume that it is a 50cc or less 4 stroke?

Are you going with a belt drive?

Quote:
Originally Posted by msrfan View Post
Here's some of the stuff I may use for a race bike I'm building. Nothing special. Old cruiser frame and my usual moped parts along with a weed wacker type motor. Haven't totally thought it out yet but it will look similar to my other racer I ran at Willow Springs only the next size down. Trying to break into a smaller class. After seeing scotto racing all day in multiple classes, I should be able to do a couple.


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  #4  
Old 07-30-2011, 11:02 PM
msrfan msrfan is offline
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Default Re: 54 Schwinn 24'' DX My Next Race Bike

I haven't got that far yet. I'm not sure of the motor specs. Have to check it out. I would like to have a Comet Torque-a-verter on this one but don't know if it has enough power to pull it.

Looks like I'll have to run with the AGK guys in the 100cc class. It's a little over 50cc. Should be fun.




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Originally Posted by MotorBicycleRacing View Post
Looking good as usual.
What are the specs on that motor?
I presume that it is a 50cc or less 4 stroke?

Are you going with a belt drive?

Last edited by msrfan; 07-31-2011 at 10:56 AM. Reason: more info
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  #5  
Old 07-31-2011, 10:35 PM
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Venice Motor Bikes Venice Motor Bikes is offline
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Default Re: 54 Schwinn 24'' DX My Next Race Bike

That's a bit of a semi rare frame to motorize, don't you think?
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  #6  
Old 07-31-2011, 10:49 PM
msrfan msrfan is offline
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Default Re: 54 Schwinn 24'' DX My Next Race Bike

That's the first thought that came to mind until I got looking at it. The rear fender loop just behind the seat has been somehow ripped out and the tubes leading to the rear dropouts were all bent up. Also being a 24'' helped me decide it would be a good strong choice for my build. I had a 24'' mountain bike frame I was going to use, but it had totally no character. The main reason for going 24'' is because I have these really nice moped drum brake hubs that are 28 spoke. I found some fairly heavy rims and enough of the right size spokes to lace up one wheel. My machinist buddy is shortening the rest of the spokes needed to do the other wheel. They're 1/8'' with large nipples. I plan to clamp the motor in without welding on the frame, so it could be restored to original. It won't be tricked out like some of your bikes, just basic and simple. Thanks for the input. Always welcome.






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Originally Posted by Venice Motor Bikes View Post
That's a bit of a semi rare frame to motorize, don't you think?
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  #7  
Old 07-31-2011, 10:50 PM
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adb140275 adb140275 is offline
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Default Re: 54 Schwinn 24'' DX My Next Race Bike

variated would be cool but the comet variator setup would start to variate WAY too soon for that engine to handle it.

puch forks? maxi or magnum?
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  #8  
Old 07-31-2011, 10:52 PM
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Venice Motor Bikes Venice Motor Bikes is offline
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Default Re: 54 Schwinn 24'' DX My Next Race Bike

Quote:
Originally Posted by msrfan View Post
That's the first thought that came to mind until I got looking at it. The rear fender loop just behind the seat has been somehow ripped out and the tubes leading to the rear dropouts were all bent up. Also being a 24'' helped me decide it would be a good strong choice for my build. I had a 24'' mountain bike frame I was going to use, but it had totally no character. The main reason for going 24'' is because I have these really nice moped drum brake hubs that are 28 spoke. I found some fairly heavy rims and enough of the right size spokes to lace up one wheel. My machinist buddy is shortening the rest of the spokes needed to do the other wheel. They're 1/8'' with large nipples. I plan to clamp the motor in without welding on the frame, so it could be restored to original. It won't be tricked out like some of your bikes, just basic and simple. Thanks for the input. Always welcome.
If the frames been damaged?, go for it & weld away!!!
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  #9  
Old 07-31-2011, 11:07 PM
msrfan msrfan is offline
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Default Re: 54 Schwinn 24'' DX My Next Race Bike

Thanks for the info. Do you think the motor will not have enough rpm, or power, or both? I wish I knew what the forks are from. I've had them forever but not the rest of the moped.




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Originally Posted by adb140275 View Post
variated would be cool but the comet variator setup would start to variate WAY too soon for that engine to handle it.

puch forks? maxi or magnum?
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  #10  
Old 07-31-2011, 11:25 PM
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adb140275 adb140275 is offline
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Default Re: 54 Schwinn 24'' DX My Next Race Bike

the comet will variate at too low of an rpm for the engine to be able to pull it. i dont know if you can get lighter weights for those or not
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