If you want to execute auto repairs to your Triumph Bonneville America then it is usually recommended to have access to a Workshop Manual to keep just for a reference in case you need to know techniques to take off a particular part for example Door and fit it again in the correct way.
Triumph Bonneville America Workshop Manuals can provide special diagnostic guidelines for your automobile therefore if something is playing up it can help you determine what the situation is and some ways to resolve it. You can then analyse if you can do this yourself or in the event the job is just too big you can book your Bonneville America in with a local car garage.
Triumph Bonneville America manual