Brake Fluid

Sound like air in the system to me. Maybe try bleeding it out and putting fresh oil in as you do.

If ur unlucky you may need to pressure flush from the bleed nipple (ooo er mussus) to the oil reservoir with a syringe or similar tool.

 

brake oil (fluid)

 

Is it the new pads that need bedding in before they give the “bite” you are used to. Brake fluid needs changing at least every two years to keep the system in top order.

 

What pads were in before the change? Not sure what "organic" means in brake pad terms but if you had sintered metal pads in previously then you should replace like with like. Stainless steel discs usually require sintered pads. If the brakes were fine before the change, assuming you haven't got air in the system (can't see how you would do that on a pad change) fluid won't be the problem. Give the pads time to bed in.

 

New pads are often spongy until they have bedded in but i found that organic pads did not stop me as well as HH sintered pads on my old sprint.