Compression System; Poor Idle Speed Performance; Poor Idle Speed Performance Poor Idle Speed Performance; Poor Medium-And High-Speed Performance - Yamaha XVS1100(L) Service Manual

STARTING FAILURE/HARD STARTING/POOR IDLE SPEED
PERFORMANCE/POOR MEDIUM-AND HIGH-SPEED PERFORMANCE

COMPRESSION SYSTEM

Cylinder and cylinder head
S Loose spark plug
S Loose cylinder head or cylinder
S Faulty cylinder head gasket
S Worn, damaged or seized cylinder
S Improperly sealed valve
S Improper valve-to-valve seat contact
S Improper valve timing
S Faulty valve spring
EB901000

POOR IDLE SPEED PERFORMANCE

POOR IDLE SPEED PERFORMANCE
Carburetor
S Improperly returned starter plunger
S Loose pilot jet
S Clogged pilot air jet
S Improperly synchronized carburetors
S Improperly adjusted idle speed
(throttle stop screw)
S Improper throttle cable free play
S Flooded carburetor
EB902000

POOR MEDIUM-AND HIGH-SPEED PERFORMANCE

POOR MEDIUM-AND HIGH-SPEED PERFORMANCE
Refer to "STARTING FAILURE/HARD STARTING". (Fuel system, electrical system, compression
system and valve train)
Carburetor
S Faulty diaphragm
S Improperly adjusted fuel level
S Clogged or loose main jet
Piston and piston ring
S Improperly installed piston ring
S Worn, fatigued or broken piston ring
S Seized piston ring
S Seized or damaged piston
Crankcase and crankshaft
S Improperly seated crankcase
S Seized crankshaft
Electrical system
S Faulty battery
S Faulty spark plug
S Faulty ignitor unit
S Faulty pickup coil
S Faulty ignition coil
Valve train
S Improperly adjusted valve clearance
Air filter
S Clogged air filter element
Air filter
S Clogged air filter element
Fuel pump
S Faulty fuel pump
8-2
TRBL
SHTG