The hydraulic clutch on my TM keeps losing fluid, I can't figure out where from. I pulled the line off at the slave cylinder and nothing came out, after being filled/bled a few days earlier and NOT ridden. The slave cylinder looks ok to me, the o-rings on the piston look fine. I can't figure this out one. If the line were split somewhere shouldn't there still be fluid at the bottom of the line to leak out when the fitting is pulled off?