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Discussion Starter #1
Parked my bike for a few months and noticed the front brake pressure has gone down. What could be the cause?
 

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Could be a host of things.

Have you squeezed it multiple times until it felt back to normal/your liking? If not, describe the feeling.

It could be air/moisture in the system. It could be attributable to the weather. Brake fluid will be have slightly differently at 90 ℉ comapred to 50 ℉. How old is the brake fluid? Do you see any leaks?
 

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Discussion Starter #3
I had recently changed the entire fluid, bled out the system before putting the bike away. As suggested, I have pumped the lever a few times to get some pressure into it. However, I have one those after market levers which are adjustable and it now requires the highest position the get any reasonable pressure feel.
 

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Pressure bleed it with a compressor, take it around the block slowly, and see if it changes.

If that doesn't help, put the lever on the lowest setting, pull the brake in, put a zip tie around the level and throttle in a full braking position, and let it sit like that over night.
 

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When's the last time you cleaned the calipers? If you cleaned them make sure you grease the pistons so they move across the seals uniformly. You may just have stuck pistons
 
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