If you have to perform fixes on your own Honda CL350 then it is always a great idea to own a Workshop Manual to keep just for personal reference in case you want to know the best ways to strip off a specific part such as the Gearbox and install it again safely.
Honda CL350 Workshop Manuals will give targeted diagnostic information for your vehicle therefore if something is faulty it can help you find out what the problem is and methods to resolve it. You will be able to evaluate if this can be done yourself or if ever the job is simply too big you could make a booking for your CL350 in with a decent mechanic.
Honda CL350 manual