i think the bottom line here is if you dont' weigh over 200 pounds then you are fine with the recommended tire pressure for riding your motorcycle on public streets.
if you happen to have tire problems doing that, its more likely because it was cold and even having them under inflated you probably can't let them heat up AND stay heated for a proper pressure for road use..
and by that i mean yes getting off the interstate you will be good and hot and not flexing too much on the sidewall but 45 mph all day then taking a turn, i doubt it.

 

AHAHAHAHAHAHAHA this has to be one of the funniest statements ever made on this forum, mostly because I think you actually believe what you wrote. Go to the track and run 36/42 and see how your day turns out. Hell I'll even pay for the trackday just to see the crash. And this is coming from someone who runs 36/42 on the street religously. Running lower pressures on the street isen't going to put anyone at risk if done within reason. Do you relize how many people don't check tire pressures often enough and end up with up to half the recommended pressure? Even I've been guilty of doing it before. I'm all for following OEM specs but deviating isen't the end of the world.

 

I do not appreciate scare tactics. To a newer rider, they can be as dangerous as poor maintenance.

As for the topic, tire psi is affected by both the situation and the equipment being used. No, an Aprilla is not a Honda. But neither have tires specific to make / model. The information found in the manual is based on the assumption the owner is using OEM equipment. Change that and you best listen to the tire manufacturer's recommendation.