If you want to undertake auto repairs on your own ATK 450 Enduro then it will always be recommended to have a Workshop Manual to keep just for personal reference in the event that you want to know how you can strip off a particular component for example Wheel Bearing and install it again accordingly.
ATK 450 Enduro Workshop Manuals will give specific diagnostic info for your car so if something is playing up it can help you identify what the issue is and some ways to correct it. You will be able to assess if you can do this yourself or in the event the job is simply too big you are able to book your 450 Enduro in with a trusted friendly mechanic.
ATK 450 Enduro manual