The engine only mount on two spot. suporting the exhause pipe give it a third anchore point. so when the engine vibrate, the pipe will not wipe up and down. this may help those who have breaking bolts problem.
Welcome to the forum Jawbreaker! You found a great forum tons of good innovation and great people. Looking forward to your builds. Yes I noticed too that wiping they do good Idea looks sharp too. Letting something rattle always leads to more wear and tear. I don't like to let that exhaust whip like that ether.
I wonder if it was secured in two places would it act too stiffin the eng.mounting kind of like a secure strap from the head or bock to the upper frame tube to stop torque twisting (pulling down and to the left) when starting the motor or dumping the clutch w/ engine reved up........I like that little question mark lol