Joined the R.C.A.F. at 17 and was trained as an Areo Engine Tech on piston engines and gas turbines got stationed in Comox where two things happened found out they wouldn't let you near an airplane until you had cleaned cowlings (engine covers) for 1 year and the next thing I found out was that a tenth hand Matchless was more than a match for a newly minted a/c engine type, I took it to pieces and put it together 3 times before I realized that the reason it wouldn't go over 15 mph was that the choke was on, this taught me that before you dismantle anything, make sure it's not something simple, in other words understand how it's supposed to work, after that, it was relatively easy to cope with other bikes particularly with shop manual in hand and the proper tools.
Bill the demon.
ps as Scunny says if it's going to #$%* get up have a suds, coffee, tea whatever but get away from it and come back with fresh mind and eyes.