Every (or nearly every) single machine ever built has at least one service task that is a challenge but nearly all of them have a few tricks which make even those tasks easier. Ranging from a truly complex bike my late (now sold) ST1300 - which virtually never needed any repairs beyond oil changes and tires, to my "agriculturally" simple old Yamaha XS650s, which do require a bit of attention from time to time, all of them have challenging jobs or "known" issues or quirks.
On the ST1300, even a simple task like changing the headlight bulbs was a total PITA which many people thought required removal of the fairing - until you find out that it isn't too bad if you come in from below and if necessary, remove the front wheel. The other big one which is coming up remarkably frequently these days on the aging ST1300, is clutch slave cylinder (CSC) leaks. This repair - according to mother-Honda - requires removal of the engine-transmission assembly (and that can cost upwards of $1800-2000!!!) - unless you know that the CSC can be accessed from below with the bike on the sidestand and then it is a 1-2 hour fix costing less than $100.
On the XS650, it was keeping the charging system alive - until you learn to check the length of the alternator brushes (which takes less than 5 minutes and if they are worn, the brushes are widely available, cheap and easy to replace using only a #2 JIS screwdriver).
Anyway, in my view, the key value of online communities such as NT Owners, ST Owners and XS650.com is the collective knowledge of all the little peculiarities and tips and tricks that come alive on these channels, complete with videos, drawings and sketches and written descriptions.
Thanks one and all!
Pete