Suzuki VL800 Service Manual page 467

THROTTLE VALVE SYNCHRONIZATION
Check and adjust the throttle valve synchronization among two
cylinders.
USE OF DIGITAL VACUUM TESTER
Step 1
• Lift and support the fuel tank. (!14-93)
• Start up the engine and run it in idling condition for warming up.
• Stop the warmed-up engine.
• Disconnect the vacuum hose 1 from each throttle body.
• Connect the vacuum tester hose to each vacuum nipple on
the throttle body with the special tools.
" 13685-02FA0: Three way joint
13681-39F00-225: Hose
Step 2
• Connect a tachometer and start up the engine.
• Bring the engine rpm to 1 100 rpm by the throttle stop screw.
#
Avoid drawing dirt into the throttle body while running
the engine without intake pipe and air cleaner box. Dirt
drawn into the engine will damage the internal engine
parts.
*1: To each vacuum nipple.
*2: To each vacuum hose. (IAP Sensor)
*3: To vacuum tester hose.
VL800K5 ('05-MODEL)
*2
*1
14-115
*3