My First Motorbike Project

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gera229

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Sep 4, 2011
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How did you manage to use a bicycle sized chain? I can't figure that one out because I can't find any bicycle sized sprockets that will fit the gear box.

You must be going fast with a 14.4:1 gear ratio.
Is your gearbox a 3:1 ratio?
What size are your wheels?

What's your max speed?
 
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MRJOHN

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Oct 31, 2009
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gera229 said:
How did you manage to use a bicycle sized chain? I can't figure that one out because I can't find any bicycle sized sprockets that will fit the gear box.

You must be going fast with a 14.4:1 gear ratio.
Is your gearbox a 3:1 ratio?
What size are your wheels?

What's your max speed?
Click to expand...
wheels 26, 35mph
 
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gera229

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Only 35?

Lowracer is using a 15.6:1 RATIO and gets up to 50mph hmmm.

By the way where did you get the 10 tooth front sprocket?
 
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gera229

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Yeah the sprocket is flat so you welded it so it does not wobble around right?
I am curious why your speed is only 35mph did you test with a gps?
 
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gera229

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Oh ok, that might show incorrect speed lol. Maybe you are going way faster, so be careful.

How do you like your acceleration?
 
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gera229

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Nice to know lol. I wish I could weld cuz I got to figure out my own way of mounting it now. What exhaust pipe are you using?
 
lowracer

lowracer

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Oct 17, 2008
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Gera,
The inside of my spark plug wire was white (I'm fairly sure). Both the ends are identical. I wanted identical since I use the other one for my 2nd PB engine. Here are some pics of what I did to one of my expansion chambers to make it work after the flex pipe started to leak.
-Lowracer-
 
lowracer

lowracer

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Oct 17, 2008
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eBay pipe...I didnt weld...Drilled one small hole thru it all & a bolt, two washers, & a nut ...some gasket sealer between it all.
-Lowracer-
 
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gera229

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Sep 4, 2011
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Oh ok lowracer. When I turn the fly wheel by my hand and ground the spark plug by having it's threads touch the casing I see no spark.
Is turning it by hand too slow?

Can you check your spark with the pull start? Are you getting a spark EVERY time?

I didn't ask you about exhaust lowracer, but MrJohn. It might be the reason he is only achieving 35mph if he has a stock pipe type.
Thanks.
 
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gera229

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Sep 4, 2011
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Low racer do you have a multi meter? If so I would be glad to hear what your multi meter reads on the ignition coil. Thanks.
 
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