If you are going to own an old British bike then you should be willing to learn everything about your old bike no matter whether an old Triumph, Norton, BSA etc, so learning to work on them is the best way to learn and get to know your old bike, when I brought my new Commando back in 76 I was young and only had Honda dirt bikes, first warranty job done on my Norton (the dreaded cracked oil tank) at the time the warranty was just for parts as the labour warranty had ran out and behold the dealer I brought my new Norton off charged me over $200 for labour as they said it took them time to find the oil leak although I told them it was the oil tank, $200 was a lot of money back then.
After complaining and they said see you for your next service, I told them this be the last time you see or work on my Norton and done everything myself since then in 1980 I started the Featherbed conversion this was the first time I ever built a bike from scratch and was the best way to learn about every nut and bolt on my Norton build, even rebuilding the motor, I rebuilt the gearbox in 1978 when the dreaded layshaft bearing blew at 12k miles, that was the first major job I learned, wasn't a hard job to do for a novias.
But learning to do all major servicing yourself your Norton should be very reliable, in 49+ years of owning my Norton I have only done a few rebuilds on parts that wore out or failed as keeping up your maintenance failures are few far between.
Knowing everything about your bike and if you did get stuck on the side of the road you usually can fix it with tools you carry but I was stuck 100 miles from home when my first Boyar black box failed, but that was caused from the major fire of 82 a week after the fire the black box was heat damaged by the fire but failed after the first ride from fixing the damage caused from the fire.
So owning an old British bike the best way to learn about your bike is to do the work yourself and there are many people on here to help with any problems, just send things out that need machining, I was lucky I worked at a Tec College for 31 years and 15 years in the maintenance workshop as a T/A to the Fitters so had access to all the machines and as time went by built a big workshop up the back of my yard and is fully set up for working on my bikes and having the right tools to do the work as well building old British bikes all from learning by doing the work myself, I have also done rebuilds for other mates over the years at mates rates.
Owning my Norton is my life and hobby and I learned a lot in the 50+ years of owning and riding motorcycles and can only do that if you learn to work on them as well a lot cheaper to do the work yourself and not getting ripped off or work from a shonky mechanics as there are a lot out there who just wants your money.
Ashley