Throttle Valve Synchronization - Suzuki GSX-R1000K5 Service Manual

5-26 FUEL SYSTEM AND THROTTLE BODY

THROTTLE VALVE SYNCHRONIZATION

Check and adjust the throttle valve synchronization among four
cylinders.
USE OF DIGITAL VACUUM TESTER
Step 1
• Lift and support the fuel tank. (5-3)
• Start up the engine and run it in idling condition for warming up.
• Stop the warmed-up engine.
• Disconnect the IAP sensor coupler 1 and remove the IAP
sensor from the air cleaner box.
• Disconnect the vacuum hose 2 from each throttle body.
• Connect the vacuum tester hose 3 to each vacuum nipple on
the throttle body.
Step 2
• Remove the air cleaner box. (5-13)
• Connect a tachometer and start up the engine.
• Bring the engine rpm to 1 150 r/min by the throttle stop screw.
• Check the vacuum of the four cylinders and balance the four
throttle valves with the balance screw 4.

Avoid dirt drawn into the throttle body while running
the engine without air cleaner box cover. Dirt drawn
into the engine will damage the internal engine parts.
NOTE:
* During balancing the throttle valves, always set the engine
rpm at 1 150 r/min, using throttle stop screw.
* After balancing the four valves, set the idle rpm to 1 150 r/min
by the throttle stop screw.
* If the above procedures cannot still synchronize the valves,
proceed to the next step.