Yamaha XV16AL Service Manual page 445

OVERHEATING/POOR BRAKING PERFORMANCE/
EAS00855
OVERHEATING
ENGINE
Cylinder heads and pistons (See page 5-53
to 5-59)
• Heavy carbon buildup
Engine oil (See page 3-20 to 3-21)
• Incorrect oil level
• Incorrect oil viscosity
• Inferior oil quality
FUEL SYSTEM
Carburetor (See page 6-1 to 6-20)
• Incorrect main jet setting
• Incorrect fuel level
• Damaged or loose carburetor joint
Air filter (See page 3-7 and 3-29)
• Clogged air filter element
EAS00857
POOR BRAKING PERFORMANCE (See page 3-34 to 3-38 and 4-22 to 4-54)
• Worn brake pad
• Worn brake disc
• Air in hydraulic brake system
• Leaking brake fluid
• Faulty brake caliper seal
• Loose union bolt
• Damaged brake hose
• Oil or grease on the brake disc
• Oil or grease on the brake pad
• Incorrect brake fluid level
EAS00860
FAULTY FRONT FORK LEGS (See page 3-43 to 3-44 and 4-55 to 4-66)
LEAKING OIL
• Bent, damaged, or rusty inner tube
• Damaged outer tube
• Incorrectly installed oil seal
• Damaged oil seal lip
• Incorrect oil level (high)
• Loose damper rod assembly bolt
• Damaged cartridge cylinder bolt copper
washer
• Damaged cap bolt O-ring
FAULTY FRONT FORK LEGS
CHASSIS
Brakes (See page 3-34 to 3-38 and 4-22 to
4-54)
• Dragging brake
ELECTRICAL SYSTEMS
Spark plugs (See page 3-14 to 3-15)
• Incorrect spark plug gap
• Incorrect spark plug heat range
Ignition system (See page 7-12 to 7-16)
• Faulty ignitor unit
MALFUNCTION
• Bent or damaged inner tube
• Bent or damaged outer tube
• Damaged fork spring
• Worn or damaged outer tube bushing
• Bent or damaged cartridge
• Incorrect oil viscosity
• Incorrect oil level
8 - 4
TRBL
SHTG
8