G-RPM’s guide to getting the most reliability and performance from your Rotax motor package
This is a pdf file so you can download it or print it out and take to the track.

How to Jet the Rotax Motor: A step by step guide with pictures showing how to change jets and set the pin.
This is a pdg file so you can download it or print it out and take to the track.

How to Build a Rotax Racing Program A guide for Dealers and Track Owners on building a Rotax Program