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Hi Anon, since your bike does start when it is rocked, we may suspect a problem with the wiring. Your Suzuki has at least three safety switches which prevent starting the engine unless certain procedures have taken place. First we must determine the efficacy of these switches. With the ignition key on, kickstand up, transmission in neutral, clutch handle depressed, emergency shut-off switch in the "On" position, depress the starter button. Normally, the headlight will dim when you depress the starter button. If it does dim and the engine does NOT crank, the problem may be low voltage from the battery or internal starter issues. If the headlight does NOT dim, there could be a problem with one of the safety switches, ie. Kickstand, clutch, neutral etc switches. To determine if one of these switches is defective, use a jumper lead to bypass each.....one at a time. Since the kickstand is most vulnerable to debris, check it first then you must locate the others and do the bypass elimination test. It is not advisable from a safety standpoint to leave a jumper wire in the circuit to circumvent the purpose of a safety switch. This procedure is for testing only. Have a nice day. Herb
Sounds like the kickstand safety switch is not making contact. There is a plunger type switch that the kickstand pushes when it is in the up position. The switch makes contact allowing the ignition system to operate. The switch is bypassed when the bike is in neutral, allowing you to start the engine. However, if the kickstand switch is not engaged when the bike is taken out of neutral, it acts the same as the kill switch on your handlebar. Some of these switches have adjustments and that may be all that is necessary. In a pinch, you can short the switch out (taking the two leads that go to it and twist them together) bypassing the safety circuit.
Test the side stand switch. Use a digital multimeter set to ohm. With the stand up it should show infinate(disconnected) with the leads connected one way and the stand up. Then switch the meters leads around and measure again. It should now read 0 ohm. If not replace the switch. If you cannot find or afford another switch bypass it using a diode connected as shown. Diode(1N4001) can be bought at your local electronics supplier/ TV repair shop. Do not connect the wires together directly.
S = switch C = connector Cut out the switch and connect the diode as shown with the banded part of the diode on the bl/w wire. If the switch did not test faulty then the problem is with the sidestand relay located at the fuse box (in the left hand panel, below the clutch lever.) These are even harder to buy. Bypass by connecting the orange/black and orange/yellow wires together. This will render the sidestand interlock system inoperative and is not recommended if you're in the habit of forgetting the stand.