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PERIODIC MAINT EN ANCE 2-15
Periodic Maintenan ce Procedures
Engine Vacuum Synchronization Inspection
NOTE
○
These procedures are explained on the assumption that
the inl
et and exhaust systems of the engine are in good
condition.
•
Situate the motorcycle so that it is vertical.
•
Remove the fuel tank (see Fuel System (DFI) chapter).
•
Pull off the vacuum hoses and the rubber cap (s) from the
right fitting of each throttle body.
•
Pull off the vacuum switch valve hose (thick) [A] from the
air cleaner housing [B].
Front [C]
CAUTION
Do not remove the inlet air pressure sensor hoses
on the left fitting of each throttle body.
•
Connect a commercially available vacuum gauge to these
right fittings of the throttle body as shown.
•
Connect a highly accurate tachometer to one of the stick
coil primary leads.
•
Plug:
Vacuum Switch Valve Hose (thick) and its Air Cleaner
Housing Hole
Vacuum Hoses of Throttle Assy (see the next figure)
A. Except California D. Vacuum Switch Valve Hose (small) G. Canister
B. California E. I nlet Air Pressure Sensor Hose H. Vacuum Gauge
C. Front F. S eparator I. Plugs