on a -1/+1 on my 03 600 revs at speed in 6th are generally 500rpms higher than normal. there are charts to let you know what gear ratio you will be getting into with what sprocket combinations. I believe a 1-/+2 will yield 3.14 were stock is like 2.81. (I THINK)... You will notice the difference in -1/+2. Im headed that way. its time for new sprockets and chain again.
edit: I have also been told by my neighbor (track rider and coach) that they wont let you on the track with a clip style masterlink chain. So I would stick to kits that offer the rivit style masterlink chains. Thats what ive been told so take it with a grain of salt. Its all heresay. I chose to follow his guidence.