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Motorized Bicycle General Discussion All topics regarding bicycles with engines.

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Old 12-14-2012, 12:48 PM
Shadow dragon Shadow dragon is offline
Motorized Bicycle Newbie
Join Date: Dec 2012
Location: New mexico
Posts: 1
Post Curb jumping? Can it hold up?

I just ordered a grubee skyhawk 2012 GT5 66cc slant head kit from and I plan to mount it on my roadmaster bike. I know I probably won't be biking on the sidewalks much if any after its mounted and running, but I tend to jump off curbs and small ledges less than a foot high when theres no ramp. Can I do that after installation or will it damage the motor or mounts? If I have to walk it off so be it. I don't want to try it just to have the motor fall out. Any tips and advice for the build would be greatly appreciated. This is my first build and I'm a little nervous. I don't want to mess it up.
I don't want to be this guy!

Last edited by Dave31; 12-15-2012 at 08:00 AM.
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Old 12-14-2012, 12:59 PM
bigbutterbean bigbutterbean is offline
Join Date: Jan 2011
Location: Lebanon, PA
Posts: 2,420
Default Re: Curb jumping? Can it hold up?

I would say that the motor can handle it, but I would be more worried about the frame. The engine does vibrate. If properly mounted, under normal circumstances the frame should do fine, but adding the force of curb jumping to the vibration of the engine could stress the frame more than it can handle. I would caution against it. Even if someone else says its probably ok, better safe than sorry, right?
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help a noob, roadmaster, skyhawk 66cc engine

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