SUCCESS. There was no way to accurately mill a measured amount of aluminum to achieve the specified gap between sensor and rotor so I just eyeballed it and was conservative on my first try. error #42 told me I had stopped short. Was too lazy to remove fender, wheel and fork again so I made a nother milling pass "in sirtu" with the milling bit in my two handed heavy duty corded drill. This was harder to control than I expected so I quit after a few minutes/ I guess I managed to gouge, er, mill about .025 in
off. it was ragged but I cleaned it up a bit with a file. Put the sensor on and went for a ride. Voila! The light stayed on longer than usual but after 50 feet it went out and stayed off (except for a few ignition on and off cycles) for the remainder of my 78 mile ride.
I tried to erase the error codes without success. The procedure seems straight forward enough although in the usual odd wording of the FSM. I may be misinterpreting. Can someone who has successfully erased codes give the repeat the procedure in English?
Thanks