If it is the neutral switch O ring, then yes, it's a very simple fix, 1 bolt holds a little metal clamp piece, undo the bolt, thge clamp piece usually comes off with it, then wiggle the switch out (it's not threaded, but can be a bit stiff to remove, some just fall out) Fit the new O ring to the switch, and re assemble. DO use a genuine honda O ring though, Dave Silver has them as others may look okay but are often a fraction too thin and leak!