The stop beneath the neutral-finder lever is an eccentric rod with a bolt holding it in position.
Park the bike with some "packing" under the centre-stand, so that the rear-wheel is free to rotate. Loosen the bolt holding the eccentric, turn it so that the "big-side" is down. Now start the engine and engage second gear. Slowly pull the neutral-finder down till it slips out of gear. Turn the eccentric to stop the lever at that position. Tighten the bolt.
Tom