Suzuki GSF1250 Service Manual page 157

Step
1 1) Turn the ignition switch OFF.
2) Lift and support the fuel tank. Refer to "Fuel Tank
Removal and Installation in Section 1G (Page 1G-9)".
3) Check the injector coupler for loose or poor contacts.
If OK, then measure the injector resistance.
4) Disconnect the injector coupler and measure the
resistance between terminals.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
Tester knob indication
Resistance (Ω)
Injector resistance
11 – 13 Ω at 20 °C (68 °F)
(Terminal – Terminal)
Action
I718H1110204-01
(A)
I718H1110205-02
Engine General Information and Diagnosis:
Yes
Go to Step 2.
1A-88
No
Replace the injector
with a new one. Refer to
"Throttle Body
Disassembly and
Assembly in Section 1D
(Page 1D-10)".