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Motorized Bicycle General Discussion All topics regarding bicycles with engines.

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Old 09-06-2015, 09:05 PM
alisonsup alisonsup is offline
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Join Date: Jun 2015
Location: Houston,tx
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Default My back wheel won't spin

I just finished installing my first kit but when I went to turn the wheels to pedal my bike outside I noticed the back wheel was stiff and was really hard to pedal. It was pedaling freely before I put the motor chain on the bike. I opened up the compartment on the motor to see if the chain was stuck or pressing against something but wasn't. I adjusted the chain tensioner to see if it was too tight but the wheel was still stiff. I did notice one thing though. When I first threaded the chain through the motor I noticed that the chain drive in the motor was hard to turn with the chain tool that came with the kit. I considered spraying it with wd40 to get it to spin smoother and easier but I didn't because I really don't know much about these kits or motors and I didn't want to ruin it. The link will bring you to my bike I'm working on and what it's doing.

*The kit I'm using is a 60cc Aosom kit where the motor is installed in the V part of the bike(between the two wheels)*

Last edited by alisonsup; 09-06-2015 at 10:44 PM.
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Old 09-06-2015, 10:54 PM
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2door 2door is offline
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Location: Littleton, Colorado
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Default Re: My back wheel won't spin

The video is too dark to see how the clutch cable is installed but my guess is the cable needs to be tightened, adjusted. Here is a good tutorial on how to do that correctly.

I did notice that your chain is much too loose. You only want 1/2" to 3/4" of slack.

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Old 09-07-2015, 11:40 AM
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bairdco bairdco is offline
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Join Date: Aug 2009
Location: living the dream in southern california
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Default Re: My back wheel won't spin

Uh, I think the obvious problem is you're not pulling in the clutch.

In the video, with the cover off, the clutch isn't hooked up. You're fighting the engine's compression.
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back tire won't turn

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