2019 KTM 150 help

The base settings in the owners manual should be really good for your weight. I'd start there.

I have a 2018 ktm 150sx and weigh about 155, 42 yrs. vet int. I am only running about 123psi in the forks for vet tracks.

Use the manual as a guide for air pressure, and adjust the clickers. Don't be afraid to go higher or lower in air pressure since it is only essentially making the "spring" weight suitable to keep to your weight. I'm 175 lbs. on a '19 150sx and I run 125psi but go stiff on the compression.

If you haven't already, wrap a zip tight around the inner tube of your fork leg somewhat tightly where it meets the upper fork, ride it at the base setting according to your weight in the manual (compression and rebound included) and ride a few hard laps. If the zip tie is lower than 2"s or so from the bottom of the fork, increase the air pressure by a few psi. If it's more than 2"s from the bottom, decrease air pressure slightly. Once it hits that 2" or slightly lower mark you should know the air pressure that works for your weight ie. 'baseline spring weight'.

From there, dial in the clickers until it feels good to you but keep that air pressure at the baseline you hit that 1.75" - 2" from bottoming out mark. It's very very hard to bottom out the '19 AER fork even at a low PSI.
Key to the fork working good all day as well when it heats up...I always bleed the air in my forks after a long hard moto so that I know my air pressure is constant and quickly recheck if I need to refill or deflate the air...then I adjust the clickers as the track changes. If you're only ripping a few laps at a time no need to bleed the air or recheck the pressure. Hope this helps.

I am 58 and weigh 195 lbs. If you would like the forks to feel anything like kyb's try 7.5 bar. That is what I use and then adjust stiffness with clickers.

I put 200 hours on a 150 between woods racing and track practice. About your same size, and would run 124psi. I had some clicker changes I would make depending on what sort of riding I would do, however I would never stray from 124psi for the air side.