Periodic Maintenance Procedures
Back out the same number of turns counted when first
turned in. This is to set the screw to its original position.
A throttle body has different "turns out" of the bypass
screw for each individual unit. On setting the bypass
screw, use the "turns out" determined during disassem-
Repeat the same procedure for other bypass screws.
Repeat the synchronization.
If the vacuums are correct, check the output voltage of the
main throttle sensor (see Main Throttle Sensor Inspection
in the Fuel System (DFI) chapter).
Special Tool - Throttle Sensor Setting Adapter:
Main Throttle Sensor Output Voltage
Connections to Adapter:
Digital Meter (+) → W (sensor Y/W) lead
Digital Meter (–) → BK (sensor G) lead
DC 1.03 ∼ 1.06 V at idle throttle opening
Remove the vacuum gauge hoses and install the vacuum
Run the vacuum hoses according to Cable, Wire, and
Hose Routing section in the Appendix chapter.
For US, CA, ID and SEA-B2 models, install the rubber
caps on the original position.
Install the removed parts (see appropriate chapters).
Fuel System Inspection
Fuel Hose Inspection (fuel leak, damage, installation
If the motorcycle is not properly handled, the high pres-
sure inside the fuel line can cause fuel to leak [A] or the
hose to burst. Remove the fuel tank (see Fuel Tank Re-
moval in the Fuel System (DFI) chapter) and check the
Replace the fuel hose if any fraying, cracks [B] or bulges
[C] are noticed.
Check that the fuel hose is routed according to Cable,
Wire, and Hose Routing section in the Appendix chapter.
Replace the hose if it has been sharply bent or kinked.
Hose Joints [A]
Fuel Hose [B]
PERIODIC MAINTENANCE 2-21