Re: new clutch or new motor
If your clutch works, but the pucks (they look like mini brakepads) are worn down, the repair is cheap and requires no unusual tools.
Beyond that, it's probably to better to get a new motor.
Maybe you can give us more details.
I thought I had a bad clutch, but after some disassembly, I found a trashed bearing on the shaft behind the sprocket was the problem and it was a cheap fix.
“You're only young once, but you can be immature as long as you like" -Unknown