You mention both analog and digital multimeters. Arent digital test meters better than the old analog type?
In the powersports world, the analog multimeter is far from obsolete, offering several advantages over the digital multimeter, among them the ability to display trends and transient inputs. The former is important in charging system checks, the latter in ignition system troubleshooting. Neither abilities are found in appreciable strength in digital multimeters, in the absence of special attachments, whereas analog meters display them very well as-is. Analog multimeters also more often come with the high current capacity needed for charging system output tests, whereas only the more expensive digitals have this capability, and usually it has to be added through an attachment. If you can buy only one, get a quality analog multimeter. If you already have a digital multimeter, then make sure it has a 10 or 20A capacity, or build yourself an external test shunt, and get a peak voltage attachment.