Checking for correct front axle nut torque is a checkpoint that should not be overlooked. It is very unlikely that the axle nut will ever loosen if the axle had previously been installed correctly and the axle nut torqued to spec. However, if it is unknown whether or not the axle nut had been previously assembled by a reliable mechanic, it is even more important to inspect.
The front axle nut torque spec is considerably lower than the rear axle nut. The factory service manual lists the front axle torque spec as 70 to 75 foot pounds. We would always suggest reaching for the higher number on a larger fastener such as this. The front axle nut is metric. Use a twenty four millimeter socket with a reliable torque wrench.
While inspecting the front axle, it is also a good idea to visually inspect your front rim and valve stem condition. Secure the motorcycle and jack up the front wheel so the wheel can be spun. Make sure the wheel spins freely. Try to feel the front wheel bearings. If the wheel feels rough when turning, you may have a bad wheel bearing(s). If this situation exists, remove the wheel to inspect the wheel bearings more closely.
Push and pull from side to side on the front wheel. Make sure there is no excessive wheel end play. If your front fender has a fender tip lamp, inspect the wiring. Verify that the wires have stayed secured in their original factory positions. If the motorcycle is ABS equipped, check for proper routing of the ABS wires. Make sure the wires are correctly orientated in their bracket and that ty-wraps are used to secure the ABS wires to the front brake line. Also, inspect for proper orientation of the ABS sensor.