I've found that every now and then with motorcycle brakes that if they work enough for a ride, that a quick trip around the block can shake the bubbles to the top and out of the master causing the feel to firm up. You have to replace the fluid that went down as the air came up. On some bikes it is easier to bleed the brakes with the calipers held higher than the master cylinder.
09 Aprilia RS125 plated
06 Paul Smart Sport Classic NFS ever.
08 S4RS Tricolore #081 NFS ever.
01 M600, aka, The Pink Monster
97 900SS CR
72 Norton Commando 750
03 KX60 with S4R rear shock,Honda CB350F, Hodaka Ace90, 3x Yam-YGS1, Yam-CS3 200, Vespa small frame, Gilera 106, Puch Sabre, Puch 50 Boy Racer, Benelli 250, Benelli 360, Honda CB350T, and many more.