Poor Speed Performance; Overheating; Faulty Brake; Poor Braking Effect - Yamaha YFM45FAR Service Manual

POOR SPEED PERFORMANCE

V-belt
Oil or grease on the V-belt
G
Primary pulley weight
Faulty operation
G
Worn primary pulley weight
G
Primary fixed sheave
Worn primary fixed sheave
G

OVERHEATING

OVERHEATING
Ignition system
Improper spark plug gap
G
Improper spark plug heat range
G
Faulty CDI unit
G
Fuel system
Improper carburetor main jet
G
(improper setting)
Improper fuel level
G
Clogged air filter element
G
Compression system
Heavy carbon build-up
G
Engine oil
Improper oil level
G
Improper oil viscosity
G
Inferior oil quality
G

FAULTY BRAKE

POOR BRAKING EFFECT

Worn brake pads
G
Worn disc
G
Air in brake fluid
G
Leaking brake fluid
G
Faulty master cylinder kit cup
G
Faulty caliper kit seal
G
Loose union bolt
G
Broken brake hose and pipe
G
Oily or greasy disc/brake pads
G
Improper brake fluid level
G
FAULTY CLUTCH PERFORMANCE/
OVERHEATING/FAULTY BRAKE
10 - 5
Primary sliding sheave
Worn primary sliding sheave
G
Secondary fixed sheave
Worn secondary fixed sheave
G
Secondary sliding sheave
Worn secondary sliding sheave
G
Cooling system
Low coolant level
G
Damaged or leaking radiator
G
Faulty radiator cap
G
Bent or damaged radiator fin
G
Damaged or faulty water pump
G
Thermostat stays closed
G
Clogged or damaged oil cooler
G
Damaged hose
G
Improperly connected hose
G
Damaged pipe
G
Improperly connected pipe
G
Brake
Brake drag
G
TRBL
SHTG