If you want to perform fixes on your Norton Commando 850 Interstate then it is always a great idea to have a Workshop Manual for reference just in case you need to know proven methods to remove a specific part such as the Wheel Bearing and install it again efficiently.
Norton Commando 850 Interstate Workshop Manuals gives you detailed diagnostic wisdom on your automobile so if something is not working it helps you identify what the issue is and ways to resolve it. You will be able to assess if this can be done by yourself or in case the job is simply too big you can make a booking for your Commando 850 Interstate in to a nearby garage.
Norton Commando 850 Interstate manual