The YZ does not have a seperate lighting coil,
so you would probably end up robbing power from the bike.
Here is a lighting coil chart I put together some time ago:
http://www.gwrparts.com/Stator_Output_Chart.html
There are aftermarket stator alternatives though.
I remember WPS carried the Electro stators several years ago.
I think they had one for the YZ back then.
I don't know if a WR stator can be mounted up to a YZ, but I'd probably look that direction first if it's possible.
so you would probably end up robbing power from the bike.
Here is a lighting coil chart I put together some time ago:
http://www.gwrparts.com/Stator_Output_Chart.html
There are aftermarket stator alternatives though.
I remember WPS carried the Electro stators several years ago.
I think they had one for the YZ back then.
I don't know if a WR stator can be mounted up to a YZ, but I'd probably look that direction first if it's possible.