27 mm. Impact (air or electric) gun would be a good help. First time I did with 12 inch adjustable wrench, but was a little hustle. You can probably get away with torque wrench, but the motor may spin. Try in upper gears. Closing torque is 94 psf.
A forum community dedicated to all Kawasaki motorcycles including the ZX-6R, KLR 650, Ninja 250, Ninja 250R, and Vulcan. Come join the discussion about performance, modifications, troubleshooting, maintenance, and more!