Overheating; Engine; Cooling System; Fuel System - Yamaha YZF-R1S Service Manual

EAS00855

OVERHEATING

ENGINE

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

COOLING SYSTEM

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

OVERCOOLING

COOLING SYSTEM
Thermostat
S Thermostat stays open
EAS00857

POOR BRAKING PERFORMANCE

S Worn brake pad
S Worn brake disc
S Air in hydraulic brake system
S Leaking brake fluid
S Faulty brake caliper kit
S Faulty brake caliper seal
OVERHEATING/OVERCOOLING/
POOR BRAKING PERFORMANCE

FUEL SYSTEM

Throttle body (-ies)
S Damaged or loose throttle body joint
Air filter
S Clogged air filter element

CHASSIS

Brake(s)
S Dragging brake

ELECTRICAL SYSTEMS

Spark plug(s)
S Incorrect spark plug gap
S Incorrect spark plug heat range
Ignition system
S Faulty E.C.U.
S Loose union bolt
S Damaged brake hose
S Oil or grease on the brake disc
S Oil or grease on the brake pad
S Incorrect brake fluid level
9-4
TRBL
SHTG