Top Gear Roll Pin

I have had an occasion where the roll pin on the top gear sheared off. Notice in the picture below. The roll pin that holds the top gear on the spur shaft is missing.

If this happens to you, it is not necessary to buy a whole new top gear assembly. You can just replace the roll pin itself. If you're not sure what roll pin you can use, any 1/16 inch axle roll pin should work. Such as part #7369 from Associated.