In a conversation with Dennis at Morgans West, they have found a company that take the aluminum take-off sprockets, machine them, then coat them with Mylar.
They've been doing this for over four years for motorcycles that use drive belts. These cost about half the price of a steel sprocket and have a lifetime warranty.
Seems like it's worth consideration.
I ordered one for myself. Will take off the stock sprocket soon while it's in good condition. Put the replacement on. Then if there are issues down the road, I've got an original sprocket to use while the aftermarket sprocket is serviced.
Don't have any more details than this.
