Chopped off top tube build and it works!

rocksalt27

Member
Oct 24, 2013
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Portland, ME
I got a 49cc on there. By the way be careful with the real short intakes. They dont sit all the way in the carb tube and you'll have a huge vacuum leak. I had that and it didn't have any power at all. Barely ran at full throttle. Some tape will fix that though.
 
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rocksalt27

Member
Oct 24, 2013
121
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Portland, ME
It's not either really, it's just a small frame. The only thing that makes it a "girls" bike is if it is a step thru frame. Otherwise there's really no such thing as a boys or girls bike.
 
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Larry Trotter

Active Member
Nov 26, 2017
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I liked it so much I just started a 20 inch. Schwinn wit a bent bottom tube so the motor sits lower. I just have to extend the seat tube up and put a straight bar on top. Probably won’t leave it pink.
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Tony01

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Nov 28, 2012
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sf bay area
Problem with thread titles like this is people usually don’t survive or care to update the thread when their mod fails...
 

Larry Trotter

Active Member
Nov 26, 2017
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I would like to know what problems the op ran across to avoid them but so far on mine I don’t see any show stoppers. I do have a 32 tooth rear sprocket on the way to compensate for the 20 inch wheel.
 

rocksalt27

Member
Oct 24, 2013
121
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Portland, ME
Hey all-just seeing these replies! Glad I inspired you to try one yourself, Larry! That frame looks nice and beefy like mine. I think you'll be OK. As for the skeptics-I've been riding it to work everyday for 2 weeks. It's been real comfortable with the low height and backrest. The only issue was the torque. It really didn't like low speeds with such small wheels and sprocket. So I pulled the muffler cap and problem solved.

Anyway, no breakdowns, and no...it hasn't collapsed.

She says, "ssh"
-Bowie
 

Larry Trotter

Active Member
Nov 26, 2017
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Mine is going very well also. I did quite a bit of work on the front and rear mounts to move the motor much lower in the frame. I am going to add a top bar to mount the tank and stiffen it up some. More pictures later of the mods.
 

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JerryAssburger

Active Member
Mar 11, 2017
205
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Salem Oregon
This is a fascinating thread! How many of us have a bunch of 20" bicycles that the kids and grandkids have out-grown, just waiting for a project like this? The funny thing is, the China-Girl looks to be "the right size" on these frames!
 

curtisfox

Well-Known Member
Dec 29, 2008
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Would be kool if you would of taken the top bar with the curve put it in place of the bottom bar. Be a nice curve for the motor to set down.............Curt
 

rocksalt27

Member
Oct 24, 2013
121
14
18
Portland, ME
Glad I inspired everyone else here! I wanted something lower like a minibike for myself. But now we can learn the kids how to ride with us too!