Poor Speed Performance; Overheating; Engine; Cooling System - Yamaha XP500 Service Manual

FAULTY CLUTCH/OVERHEATING/OVERCOOLING

POOR SPEED PERFORMANCE

V-belt
• Oil or grease on the V-belt
Primary pulley weight(s)
• Faulty operation
• Worn primary pulley weight
Primary fixed sheave
• Worn primary fixed sheave
EAS00855

OVERHEATING

ENGINE

Clogged coolant passages
• Cylinder head(s) and piston(s)
• Heavy carbon buildup
Engine oil
• Incorrect oil level
• Incorrect oil viscosity
• Inferior oil quality

COOLING SYSTEM

Coolant
• Low coolant level
Radiator
• Damaged or leaking radiator
• Faulty radiator cap
• Bent or damaged radiator fin
Water pump
• Damaged or faulty water pump
• Thermostat
• Thermostat stays closed
• Oil cooler
• Clogged or damaged oil cooler
• Hose(s) and pipe(s)
• Damaged hose
• Improperly connected hose
• Damaged pipe
• Improperly connected pipe
EAS00856

OVERCOOLING

COOLING SYSTEM
Thermostat
• Thermostat stays open
Primary sliding sheave
• Worn primary sliding sheave
Secondary fixed sheave
• Worn secondary fixed sheave
Secondary sliding sheave
• Worn secondary sliding sheave

FUEL SYSTEM

Throttle body
• Damaged or loose throttle body joint
Air filter
• Clogged air filter element

CHASSIS

Brake(s)
• Dragging brake

ELECTRICAL SYSTEMS

Spark plug(s)
• Incorrect spark plug gap
• Incorrect spark plug heat range
Ignition system
• Faulty ECU (engine)
9 - 3
TRBL
SHTG