Instructions for JSD-1/1A, 2/2A, 3/A,4/4A

Background

Suzuki manufactures motorcycles with a different ignition map for each gear. In the lower gears, the ignition timing is retarded. The JSD sends a fixed signal to the Electronic Control Unit (ECU) which eliminates the retardation. This enables a more responsive throttle and faster acceleration in the lower gears.

Product Description Functionality Recommended Suzuki Model JSD-1   Automatic, 6.8k ohm resistor Sends a fixed signal for 5th gear to the ECU for all gears. Fuel-injected GSXR-1000, Hayabusa   JSD-1A   Automatic, 15k ohm resistor Sends a fixed signal for 6th gear to the ECU for all gears. Fuel-injected GSXR-600/750, TL1000R JSD-2   Automatic, 6.8k ohm resistor Sends a fixed signal for 5th gear to the ECU for all gears except neutral (preserves neutral). Fuel-injected GSXR-1000, Hayabusa JSD-2A   Automatic, 15k ohm resistor Sends a fixed signal for 6th gear to the ECU for all gears except neutral (preserves neutral). Fuel-injected GSXR-600/750, TL1000R JSD-3 Automatic, 6.8k ohm resistor Sends a fixed signal for 5th gear to the ECU for all gears. Fuel-injected GSXR-1000, Hayabusa JSD-3A Automatic, 15k ohm resistor Sends a fixed signal for 6th gear to the ECU for all gears. Fuel-injected GSXR-600/750, TL1000R JSD-4 Automatic, 6.8k ohm resistor Sends a fixed signal for 5th gear to the ECU for all gears. Fuel-injected GSXR-1000, Hayabusa JSD-4A Automatic, 15k ohm resistor Sends a fixed signal for 6th gear to the ECU for all gears. Fuel-injected GSXR-600/750, TL1000R

Installation Steps

1) Using a 4mm Allen wrench, remove the two fuel tank bolts.

2) Using a 4mm (5mm for Busa) Allen wrench, remove the two seat bolts and the seat.

3) Lift the fuel tank and support it using the tank prop tool.

4) Locate the Gear Position Sensor (GPS) connectors (white, three-pin, triangular connectors with black, blue and pink wires). On most models, they are located on the left side near the frame rail. On the 1998 GSXR-750, they are located in the storage compartment, right side. On the TL1000R, they are located in the storage compartment, left side.

5) Pull apart the GPS connectors.

6) Connect the JSD male to the GPS female connector. Connect the JSD female to the GPS male connector.

NOTE:

• Alway pull the JSD by it's connectors, never it's wires!
• The stock dash gear display will either read 0 or 5/6 for the JSD-3, 3A,4,4A.

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