Designed for the adventurous rider, the BMW R1200GS will have many opportunities to get a flat tire. If this occurred to you on a ride, would you know what to do? Someone with no motorcycle maintenance experience can complete the process of changing a flat tire, front or rear, as long as he has the correct tools and a replacement tire.
Park your BMW R1200GS on a solid, flat surface with room to work on each of the sides. Lift the motorcycle off the ground using the centre stand or motorcycle jack so that both tires spin freely.
Release the two retaining clips securing the ABS sensor cable to the brake line if removing the front tire.
Remove the two larger brake caliper securing screws with an Allen wrench. These screws are found nearest the fork and secure the caliper in place. Forcefully remove the brake caliper from the wheel rotors by rocking the caliper back and forth while pulling on it. The caliper will then freely hang from the brake line out of the way from the wheel.
Loosen the axle clamping screw, with an Allen wrench, on the front near the bottom of the fork if looking directly at the BMW R1200GS.
Attach the socket extension into the square drive of the 7/8-inch or 22mm spark plug socket backwards. The hex end will then become the front end of the socket, and the cylinder end will face the wrench.
Insert the hex end of the socket into the sunken-in axle bolt located at the bottom of the front fork. Rotate the axle bolt counterclockwise until it loosens, and you can pull the axle out.
Remove the front tire and replace it with the new tire before sliding the axle back through the fork holes. BMW recommends torque specifications of 50 Nm for the quick-release axle bolt and 19 Nm for the axle clamping screw.
Slide the caliper back onto the front wheel disc and tighten the securing screws to 30 Nm. Once the calipers are correctly mounted, squeeze the front brake lever to bed the brake pads back into place. Finish by closing the two retaining clips holding the ABS sensor onto the brake line.