If it's only 2nd it's likely worn dogs/windows on 2nd gear and the 3/4 cluster...have a strong mate come over and hold your bike upside down so you can just pull the lower case off to replace the gears.... shouldn't take any longer than say 3 or 4 beers to fix
You have to split the case's, motor has to be off the frame, or should we say frame has to be off motor sense you pick the frame up off the motor make them do it!!! I know you guys are joking, but if it was you in his shoes!!! I don't think he's getting a really good laugh out of it, bummer when the bike's down, my bike is a little apart now, I was working on the TB's and dropped my 3mm hex socket down there somewhere I think on to of the oil tank, tried till I gave up about an hour or a little more, I was putting the air boxes back on after adjusting the TB's, and cleaning, bummer just bought the set, so I still have the head coolant bleeder back there from changing the coolant a few weeks back taking about 3 or 4 hours to do a half hour normally job. Bummer finally broke down and bought a bolt from home Depot and more from advance auto parts cause I needed 12mm long, a long story, neither one had it. By the way it's not magnetic, the socket is but still couldn't fish that out either.
So this weekend I'm going to pick the TB's up a little so I can see behind it and hopefully get the stuff, I've ridden it sense the bolt, but the socket is still there, I hate missing a socket out of a set, I know I could by another 3mm socket by itself, but I don't want to do that, I didn't find one from the same manufacturer, so it just wouldn't be the same, I'm on a mission to get my stuff back!!!
Oh whenever you take the bleeder out put some Clay bar in the socket!!! Works great, good Day