If you have to carry out adjustments on your own Moto Guzzi Mille GT then it is usually a good plan to own a Workshop Manual for a guide if you need to know the best ways to take off a particular component much like the Gearbox and install it again in the correct way.
Moto Guzzi Mille GT Workshop Manuals will give unique diagnostic info with regards to your car or truck therefore if something is not working it will help you understand what the problem is and easy methods to make it better. You will be able to assess if this can be achieved on your own or if the job is simply too big you can still make a reservation for your Mille GT into a suitable car garage.
Moto Guzzi Mille GT manual