Since bike size, carb model, exhaust system, other mods, all have an affect on what jets would make it perform best, you're not likely to find a guide that would give you the jet sizes and needle settings that would work for you. As for the actual work it's really pretty easy to do but not so easy to get it to run right. Pull the carbs, remove the float bowls, exchange the jets, remove the caps, adjust needle clip, reassemble and reinstall the carbs. Make any needed adjustments to the mixture screws. If you're not familiar with the carbs you can see a breakdown in the parts diagram at kawasaki.com under owner info. The trick with any rejet is getting the right combination of jets, needle height, and mixture adjustment for your bike. Here is a link that might help in trying to determine what jet changes you need to make.
CV Carb Tuning Procedures