The 1-42 & 1-43 originally didn't come with a handlebar brace. They had a yellow plastic bumper covering the hole in the lower end of the rear handle. You could put a handle brace on one easily enough since all of the necessary mounting holes are there. I guess that was some marketing genius's idea at Mac HQ, of making another cosmetic alteration besides the normal switching of color combinations on the air filter & clutch covers, half wrap or full wrap handlebars, & stack pipe or round mufflers. Makes it a bit more difficult to put your foot in the "stirrup" while starting the saw on the ground, when there's no stirrup there to speak of. That brace also takes some of the wear & tear that the crankcase, crankcase cover, & fan housing would otherwise be subject to. It also makes it a bit easier to maintain your grip, & offers some protection to your hand. The brace would also helps prevent accidental throttle activation. in a time when grip safeties had yet to be developed.
:greenchainsaw:
You got it right, mine came without the brace and I bought one for it. It kinda felt awkward without the brace and the saw didn't look right.