VC mechanism troubleshooting

INSUFFICIENT POWER AT LOW AND MID SPEED

• Oil control actuator (solenoid) failure

• Igniter failure

- Rocker arm shaft operation failure

• Foreign substance sticking, dent or

scratch

• Rack & pinion improperly set

• Sub rocker arm play improperly adjusted

VC actuator operation failure

• Insufficient oil pressure from engine

• Oil pipe 0-ring damaged

• Actuator piston not sliding properly Improper valve clearance adjustment

(NOT REACHING HIGH SPEED AND POWER INSUFFICIENT

d.

eeze clutch lever and apply both front rear brakes securely.

lnspection must be done in a short period of

i time.

Switching sound is Switching sound is

'------

heard. not heard.

Electrical system failure

• Oil control actuator (solenoid) failure

• Gear shift switch failure

• lgnitor failure

Check if two rocker arm shafts are both on high * Rocker arm shaft operation must be checkedspeed side. by two persons.

i

• Foreign substance sticking, dent or scratch

• Rack & pinion improperly set

- VC actuator operation failure

• Insufficient oil pressure from engine

• Oil pipe 0-ring damaged

• Actuator piston not sliding properly

• Improper valve clearance adjustment

• Fail safe switch failure

• lgnitor failure

GSF400VV ('97-MODELJ 11-48

ABNORMAL SWITCHING SOUND OCCURS DURING RUNNING

Switching sound persists.

Switching sound occurs at revolutions other > --­

than 9 000 rpm.

(TAPPET NOISE TOO LOUD

Check if tappet clearance and sub rocker arm play are within specification.

Electrical system failure

• Oil control actuator (solenoid) failure

Rocker arm shaft operation failure

• Foreign substance sticking, dent or scratch

• Rack & pinion improperly set

VC actuator operation failure

• Insufficient oil pressure from engine

• Oil pipe 0-ring damaged

• Actuator piston not sliding properly

Electrical system failure

• Oil control actuator (solenoid) failure

• Igniter failure

i

Normal Beyond specification

Start engine and check if two rocker arm shafts are on low speed side during idling.

Adjust tappet clearance and sub rocker arm play.

Shafts are on low speed side.

i

Electrical system failure

• Oil control actuator (solenoid) failure

• Igniter failure

Rocker arm shaft operation failure

• Foreign substance sticking, dent or scratch

• Rack & pinion improperly set

• Sub rocker arm play improperly adjusted

- VC actuator operation failure

• Insufficient oil pressure from engine

• Oil pipe 0-ring damaged

• Actuator piston not sliding properly

• Noise other than from tappet or rocker arm

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