CPI vs Yamaha BWS wheel drive splines same?

[CPI Guy]

If any one can confirm the Yamaha BWS (2003-2005) model has a 18 spline rear output shaft for the rear wheel/hub?

This is what is on the CPI motor now.

I have been thinking about this some more..
I think even if the spline is the same - the brake shoes/drum will be different?
I don't think I will be using the brakes on the motor as it will drive a axle that can then use disk brakes to stop the axle/wheels.
I am trying to avoid making a new sprocket adapter from the perfectly good BWS rear wheel.

Split ball with me here... I am going to look at the 2005 BWS with less than 1000km on it from a older couple this weekend & would be nice to know the spline is the same without having to remove wheel to find out. Almost a shame to pull the motor but will be put to good use.