In choosing the hole saw, one with a long pilot drill, or one that is adjustable if preferable. If the pilot drill is too short, the hole saw teeth will contact the ribs in the air box floor first making drilling more difficult. To begin installation, remove the air filter. Carefully position the template in the bottom of the airbox, and drill the hole. Any tiny chips left will be drawn into the cylinders and burned.
Test fit the valve into the hole.
It may be too large initially. If so, lightly sand the valve to reduce its circumference until it is a snug fit, and can be pushed all the way down, flush against the ribs in the bottom of the airbox. Once you are satisfied with the fit, take the valve back out, and proceed to glue it in place. Ensure that the area around the hole in the airbox in clean, and free from any oil or gas. Mix the epoxy well, and apply it to the lower part of the circumference of the valve, where it will seat in the airbox.