If you wish to undertake adjustments on your CCM 450 DS Supermoto then it will always be recommended to own a Workshop Manual for personal reference in case you want to know how to remove a certain component including Exhaust and match it again effectively.
CCM 450 DS Supermoto Workshop Manuals provide you with targeted diagnostic info on your automobile so if something is not working it can help you ascertain what the issue is and methods to correct it. You will be able to analyse if this can be done yourself or that the job is just too big you could book your 450 DS Supermoto right into a decent mechanic.
CCM 450 DS Supermoto manual