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1998 Yamaha Royal Star XVZ 1300 A Questions & Answers
Front brake problem with 1998 Yamaha Royal Star
Replace the brake lines !
Yamaha service says lines should be replaced after 4 years, and this is one of the reasons why.
As the inner material of the line deteriorates with age, it is possible for tiny pieces to break away and get lodged in the master cylinders return orifice. This could allow fluid to enter the line to squeeze the brake pads, but block the return, effectively locking up the pads.
Ron, Erie, Pa.
I just changed the hydraulic master cyl and bleed
It sounds very much like you have still got air in the system, have you tried bleeding the system with individual strokes Eg: bleed tube on nipple going into a glass jar with some fluid in the bottom of it. Release the bleed nipple operate the clutch, keeping the clutch gripped tighten the bleed nipple. release the clutch then open the nipple and grip the clutch again then close the nipple release the clutch etc etc until there is no bubbles appearing in the fluid in the jar. Remember you can compress air and so any air that is in the system will compress instead of displacing the fluid. Fluid cannot be compressed therefore it must be displaced, so no air in the system then displacement occurs. Failing that release the outflow from the MC just enough for fluid to escape then wrapping a cloth around the outflow pipe to avoid fluid dripping on paintwork, pull the clutch then tighten the outflow pipe, release it once again and pull the clutch then tighten the pipe again when you feel sure there is no air in the MC making sure the outflow pipe is tightened then move down to the slave cyl and bleed as describediously prev
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