Need help attaching freewheel/gear to motor shaft

[omegagamer89]

Ok, so I finally got all my other stuff sorted out on my first build. The problem is, after hooking it all up, I realized that the gear on my motor is too small for a standard bike chain.
Im using this motor:
http://www.ebay.com/itm/-/380476218796?item=380476218796&ViewItem=

So, how can I make this work? Is there a way to attach a bigger gear over top of that one?

I have a few of these:
http://www.ebay.com/itm/18-Teeth-Replacement-Sprocket-Freewheel-Scooter-/390472789603?pt=Cycling_Parts_Accessories&hash=item5ae9fdee63

That I figure I could somehow put over the gear on the motor, but Im at a loss as to how to attach it.

What kind of confuses me is that ALL the motors I find when I search for them have that same sized gear. IS this a common thing? IS there a, like, "Standard" way of getting around this? Any help would be greatly appreciated.

(moderator edit: please do not repeatedly post the same question in multiple forums)

 

[omegagamer89]

Ok, so I finally got all my other stuff sorted out on my first build. The problem is, after hooking it all up, I realized that the gear on my motor is too small for a standard bike chain.
Im using this motor:
http://www.ebay.com/itm/-/380476218796?item=380476218796&ViewItem=

So, how can I make this work? Is there a way to attach a bigger gear over top of that one?

I have a few of these:
http://www.ebay.com/itm/18-Teeth-Replacement-Sprocket-Freewheel-Scooter-/390472789603?pt=Cycling_Parts_Accessories&hash=item5ae9fdee63

That I figure I could somehow put over the gear on the motor, but Im at a loss as to how to attach it.

What kind of confuses me is that ALL the motors I find when I search for them have that same sized gear. IS this a common thing? IS there a, like, "Standard" way of getting around this? Any help would be greatly appreciated.

(moderator edit: please do not repeatedly post the same question in multiple forums)

 

[omegagamer89]

Whoops! Wrong board. Sorry, ment to post in E-BIKE general.

 

[dumbass]

First off how are you reducing the RPMs to a usable speed? What I've always done is installed a jack shaft. Drive the input side of the J shaft with and size chain you like. On the output side ues a freewheel that connects to what ever your driving (chain sprocket for example). You will also need a freewheel adaptor that matches your freewheel and shaft size.

Bob