On this parts fiche the Bolt,special,6x25 is the most specified component.
The most reasonably priced component used on the Nsr125r 2001 (1) European Direct Sales Front Wheel is the Washer,spdmt.gear.
A sample from the products for the Front Wheel include: B/brg Rad N/com, Seal,speedometer, Valve,rim (pirell, Gear,speedometer.