Suzuki GSX-R 1000 Service Manual: Throttle valve synchronization
Check and adjust the throttle valve synchronization
among four cylinders.
- Start the engine and run it in idling condition
for
warming up.
- Stop the warmed-up engine.
- Lift and support the fuel tank. Refer to “fuel
tank
removal and installation” in section 1g (page 1g-
9).
- Remove the clamps (1).
![Suzuki GSX-R. Throttle valve synchronization](images/books/111/7/index.14.jpg)
- Disconnect the respective vacuum hoses (2) from
vacuum nipples on the throttle body.
- Disconnect the iap sensor coupler (3).
![Suzuki GSX-R. Throttle valve synchronization](images/books/111/7/index.19.jpg)
- Connect the respective vacuum tester hoses (4) to
the vacuum nipples.
![Suzuki GSX-R. Throttle valve synchronization](images/books/111/7/index.20.jpg)
- Set up the sds tool. (Refer to the sds operation
manual for further details.)
- Start the engine.
- Click “data monitor”.
- Warm up the engine (engine coolant temp. More
than 80 °c (176 °f)).
![Suzuki GSX-R. Throttle valve synchronization](images/books/111/7/index.15.gif)
- Click “active control”.
- Click “isc air volume control” (5).
![Suzuki GSX-R. Throttle valve synchronization](images/books/111/7/index.21.jpg)
- Click “on” button (6) to fix the isc air volume of four cylinders.
Note
when making this synchronization, be sure that the engine coolant
temperature is within 80 – 100 °c
(176 – 212 °f). |
![Suzuki GSX-R. Throttle valve synchronization](images/books/111/7/index.22.jpg)
- Engine speed: approx 1 150 rpm
- Isc valve position: approx 48 step
|
- Check for the synchronization of vacuum from #1 to
#4 cylinders.
![Suzuki GSX-R. Throttle valve synchronization](images/books/111/7/index.18.gif)
- Equalize the vacuum of the cylinders by turning each
air screw (7) and keep it running at idling speed.
Note
always set the engine rpm at idle rpm. |
![Suzuki GSX-R. Throttle valve synchronization](images/books/111/7/index.24.jpg)
- If the adjustment is not yet correct, remove each air
screw and clean them with a spray-type carburetor
cleaner and blow dry with a compressed air. Also,
clean the air screw passageways.
Note
- slowly turn the air screw clockwise and
count the number of turns until the screw
is lightly seated.
- Make a note of how many turns were made
so the screw can be reset correctly after
cleaning.
|
- Repeat the procedures from 9) to 16).
- Close the sds tool and turn the ignition switch off.
- Disconnect the vacuum tester and reinstall the
removed parts.
- After completing the throttle valve synchronization, clear the dtc and
reset the isc learned value using sds tool. Refer to “isc valve preset and
opening initialization” in section 1c .
Visually inspect the isc valve if necessary.
Inspect the isc valve for any carbon deposition
defects. Clean or replace the isc valve if necessary.
...
When removing or replacing the throttle body assembly,
reset the isc valve learned value in the following
procedures:
turn the ignition switch on position.
Set up the sds tools. (Refer t ...
Other materials:
Diagnostic information and procedures
Engine lubrication symptom diagnosis
Oil pressure check
Check the engine oil pressure periodically. This will give
a good indication of the condition of the moving parts.
Note
before checking the oil pressure, check the
following.
Oil level (refer to “engine oil and fi ...
Specifications
Service data
Valve + guide
unit: mm (in)
Camshaft + cylinder head
unit: mm (in)
Cylinder + piston + piston ring
unit: mm (in)
Conrod + crankshaft
unit: mm (in)
Balancer
unit: mm (in)
Oil pump
Clutch
unit: mm (in)
Drive train
unit: mm (in) except ratio
...
Drive chain
This motorcycle has a master link
type drive chain. We recommend
that you take your motorcycle to
an authorized suzuki dealer if the
drive chain needs replacing.
The condition and adjustment of
the drive chain should be checked
each day before you ride. Always
follow the guidelines for ins ...