2nd gear stutter.

[flakey]

here is a link to a picture of the selector fork showing the raised parts on the end of the fork,
http://www.ebay.co.uk/itm/50713-Yamaha-FZS600-Fazer-1999-Gear-Selector-Forks-x-2-/301220011273?hash=item46221c9d09

here is a link to DANS Motorcycle gearbox repairs, scroll down the page till you see a picture with 'shifter drum' underneath, this picture clearly shows a shifter in position of a cog and shows the 3 x square blocks on the back of the cog, these block edges you will need to check for wear

http://www.google.co.uk/url?sa=t&rct=j&q...4247,d.bGQ