If you have to conduct repairs to your Husqvarna SM 450RR then it is always a good plan to have access to a Workshop Manual for a guide if you want to know simple methods to take off a specific component such as the Clutch and fit it again appropriately.
Husqvarna SM 450RR Workshop Manuals will give you certain diagnostic guidelines on your vehicle therefore if something is wrong it can help you determine what the problem is and how you can resolve it. You will be able to evaluate if this can be achieved by yourself or if the job is just too big you can actually make a reservation for your SM 450RR in to a suitable garage.
Husqvarna SM 450RR manual