POOR MEDIUM AND HIGH SPEED PERFORMANCE

COMPRESSION SYSTEM

— Cylinder and cylinder head

PROBABLE CAUSE

— •Loose spark pług

•    Broken cylinder head gasket •Broken cylinder gasket

•    Loose cylinder head or cylinder •Worn, damaged or seized cylinder

— Piston and piston ring

—    •Improperly installed piston ring •Worn, fatigued or broken piston ring •Seized piston ring

—    • Seized or damaged piston

— Crankcase and crankshaft

■—•Improperly seated crankcase

•    Improperly sealed crankcase {Damaged oil seal)

•    Seized crankshaft

^L Reed valve

■— •Deformed reed valve stopper

•Improperly adjusted reed valve stopper height

•    Improperly seated reed valve •Loose intake manifold •Broken gasket

•    Broken reed valve

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