Altering the wheelbase!!!
 

Here's something i did not know ( more )
When altering the wheelbase of your 99*

Taken from
http://www.sigmaperformance.com/suspensionarticle.html

For instance if you make the swingarm 10 mm longer, as you would if you reduced the teeth on the rear the rear sprocket, you have more leverage working on the spring and therefore it gives a softer feeling. On a Ducati you would need a full half kilo heavier spring to get you back close to where you were. The best way to check that is once you get everything set up on the bike you put the bike on the ground and check the static sag, because you've got a longer wheel base all of a sudden you've got more static sag. So we add some pre-load to it to get it back to where we were. Now we test it, and the rider complains it seems to sit down a little bit at the rear, and of course the linkage angles have changed so the shocks moving slower, feels softer and with less compression. It is virtually impossible to change only one variable

Just more to think of when changing the gearing !!!!:D

That's the reason Monster Mob change the primary drive on Shakey's bike rather than mess around with sprocket changes.

so what can I expect if I change to 2 teeth larger at the rear:o