Overheating; Faulty Brake; Poor Braking Effect; Front Fork Oil Leakage And Front Fork Malfunction - Yamaha TTR250L Service Manual

OVERHEATING/FAULTY BRAKE/FRONT FORK OIL
LEAKAGE AND FRONT FORK MALFUNCTION
NB295100

OVERHEATING

OVERHEATING
Ignition system
Improper spark plug gap
Improper spark plug heat range
Faulty ignition coil
Compression system
Heavy carbon built-up
Brake
Dragging brake

FAULTY BRAKE

POOR BRAKING EFFECT

Disc brake
Worn brake pad
Worn brake disc
Air in brake fluid
Leaking brake fluid
Faulty cylinder kit cup
Faulty caliper kit seal
Loose union bolt
Broken brake hose
Oily or greasy brake disc
Oily or greasy brake pad
Improper brake fluid level

FRONT FORK OIL LEAKAGE AND FRONT FORK MALFUNCTION

OIL LEAKAGE

Bent, damaged or rusty inner tube
Damaged or cracked outer tube
Damaged oil seal lip
Improperly installed oil seal
Improper oil level (too much)
Loose damper rod holding bolt
Broken cap bolt O-ring
Loose drain bolt
Damaged drain bolt gasket
Fuel system
Improper carburetor main jet
(improper setting)
Improperly adjusted fuel level
Clogged air filter element
Engine oil
Incorrect oil level
Improper oil viscosity
Inferior oil quality

MALFUNCTION

Bent, deformed or damaged inner tube
Bent or deformed outer tube
Damaged fork spring
Worn or damaged slide metal
Bent or damaged damper rod
Improper oil viscosity
Improper oil level
8 - 4
TRBL
SHTG