I couldn't pull a pulley/gear off a scratched motor shaft and I couldn't find a puller in nearby stores.
So, I made this simple gear puller at the TechShop.ws in Menlo Park, California.
Step 1: Materials and Tools
2 inches of: 1.5 inch x 0.06 inch Hot Rolled Mild Steel Square Tube A513 [Online metals.com $0.64]
1.25 x 0.25 inch bolt (20 threads per inch)
TOOLS (available at TechShop.ws):
3/8 inch diameter drill bit
7/32 inch diameter drill bit
1/4 - 20 thread tap
tapping fluid (light oil)
Bridgeport mill and 3/8 mill end
(or band saw)