2007-2009 Kawasaki KFX50 service manual, Page 184Get this manual
13REAR WHEELSWING ARMHYDRAULIC BRAKE TROUBLESHOOTING Rear wheel wobbling Bent rim Faulty tire Axle not tightened properly Soft rear shock absorber Weak shock absorber spring Faulty damper Loose brake lever Air in hydraulic brake system Brake fluid level too low Hydraulic brake system leakage Hard braking Seized hydraulic brake system Seized piston Brake noise Contaminated brake pad surface Excessive brake disk run out Incorrectly installed caliper Brake disk or wheel not aligned Poor brake performance Air in brake system Deteriorated brake fluid Contaminated brake pads and brake disk Worn brake pads Worn brake master cylinder piston oil seal Clogged brake fluid line Deformed brake disk Unevenly worn brake caliper Tight brake lever Seized piston Clogged hydraulic brake system Smooth or worn brake pad Poor brake performance Contaminated brake pad surface