64 Tooth Sprocket #25, 3-bolt (black) for 47cc mini pocket bikes, MTA1, MTA2, 39cc MTA4
  

 Chain Size: #25

Inside diameter   (26mm)

Bolt Hole Spacing:  34mm (eye to eye)
 

 NOTE: Most mini pocket bike use the stock 17.5 in (folded), 18 inch, or 18.5 inch chain and stock 68 tooth sprocket.

so, we this smaller 64 tooth sprocket, you'll need to get a shorter chain. We do sell shorter chain on ebay.

You are only buying the sprocket.  Pocket bikes is not include.

 The sprocket fits the mini pocket bikes pictured above.

 

USA Seller. $3 ship cost 
we ship the same business day, all parts place before 4pm Pacific standard time.