13. BRAKE SYSTEM ATV 300/250
SERVICE INFORMATION
GENERAL INSTRUCTIONS
· During servicing, keep oil or grease off the brake pads and brake disk.
· Drain the brake fluid from the hydraulic brake system before disassembly.
· Contaminated brake disk or brake pads reduce stopping power. Clean the contaminated brake
disk with high-performance brake degreaser and replace the brake pads.
· Do not use brake fluid for cleaning.
· Bleed air from the brake system if the brake system is removed or the brake is soft.
· Do not allow any foreign matters entering the brake reservoir when filling the brake reservoir
with brake fluid.
· Brake fluid will damage painted, coated surfaces and plastic parts. When working with brake
fluid, use shop towels to cover and protect painted, rubber and plastic parts. Wipe off any splash
of brake fluid with a clean towel. Do not wipe the machine with a towel contaminated by brake
fluid.
· Make sure to use recommended brake fluid. Use of other unspecified brake fluids may cause
brake failure.
· Inspect the brake operation before riding.
SPECIFICATIONS mm (in)
Item Standard Service Limit
Brake disk thickness 3.84.2 (0.1520.168) 3 (0.12)
Brake disk runout 0.3 (0.012)
TROUBLESHOOTING
Loose brake lever Tight brake lever
· Air in hydraulic brake system ·Seized piston
· Brake fluid level too low ·Clogged hydraulic brake system
· Hydraulic brake system leakage ·Smooth or worn brake pad
Poor brake performance Brake noise
· Air in brake system · Contaminated brake pad surface
· Deteriorated brake fluid · Excessive brake disk run out
· Contaminated brake pads and brake disk · Incorrectly installed caliper
· Worn brake pads · Brake disk or wheel not aligned
· Worn brake master cylinder piston oil seal
· Clogged brake fluid line Hard braking
· Deformed brake disk ·Seized hydraulic brake system
· Unevenly worn brake caliper ·Seized piston
13-2
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