I was reading on MotovationUSA's site for their DRZ axle sliders:
I have an '06 DRZ400sm. It has a cotter pin. How do I tell if it's a castle nut or the OEM lock nut?This part currently will not fit US/Canada spec bikes that use a cotter pin and castle nut IF the use of the cotter pin is necessary. Installing of these sliders will require removal of the cotter pin. If your bike utilizes an original Suzuki lock nut, this will fit just fine.