I had the factory clutch replaced in my 03 ba xr6t with a aftermarket hd clutch about 1 yr ago and the mechanic said he had to blow out the clutch line with air and a whole heap of thick gooey chunks of sh*t sprayed out every where, he also said I should look at doing it again after a few months which I never got around to. was wondering if this was common, what causes this and how to go about blowing it out again?