I've got this '00 Yamaha xvs650 for 2 months now. The previous owner rarely rode it, like once every few months. The problem is, the front disc is greasy, moist, with brake dust mixed and builds up in the disc holes. The braking force is not as good as it suppose to be! At first i thought the previous owner sprayed wd40, to keep the disc from rusting cos he rarely rode it. So i took the pads and callipers out, washed everything down with soapy water. A few days later, i saw greasy streaks building up on my disc again. I've got no idea where the grease is comming from. I've bought the calliper seals kit and brake fluids to change the seals. I checked the calliper pistons, they are bone dry and i am not losing brake fluids! Its full to the rim when i take the cap off. Has anyone experience this? Does brake pads soak up grease (wd40) then release slowly onto the disc even after i've washed them? This problem is really on my nerves, any advice is appreciated.