Vapa

I have measured everything now and seems like the pulse from ecu coming to the ignition coil seems bit weird, could be because of my cheap ass multimeter but the voltage reading shows zero when I try to start but when I let off the start button the multimeter shows a little peak of voltage.

Massholejim

When cranking check voltage drop at the battery if it drops to low it isn’t going to start

Vapa

I measured the battery and it showed 12,20v and when pressed the starter button the battery voltage dropped to 9,36v.
But I have tried to start it quite many times already so.

Rainerio

Try jumping it off a known good battery

Vapa

Okay so I charged the battery and shows bout 14v and when press start it drops to 10-11v so that seems good to me. Alsso the battery has been replaced about 4-5months ago. So I noticed noticed something kinda interesting cuz when I press the start it doesn't give any signal to ignition coil but after I let off the start button it gives a little peak of voltage as I mentioned before, but today I noticed it does it with fuel pump as well so when trying to start no voltage but as soon as I stop pressing the start button it gives a peak of voltage. So could this be the broblem and what is possible reason or failed part that does it.

Massholejim

Shouldn’t drop below 12

Vapa

So do I buy just a new battery and try with that, after charging the battery the starter had power to crank the engine pretty good, didn't sound lazy or anything.

Massholejim

Try jumping off a good battery but the plug should be cleaned it is probably soaked with gas from trying to start .My bike won’t start if battery isn’t strong you can also try jump starting it hit the starter button at the same time as releasing the clutch.

Vapa

I haven't tried to start it ihave just checked the spark by taking the sparkplug off and then put it to engine to see if there is spark at all and there is not one. So there's really no point to try to start it if it doesn't get spark

Noubazor

after reading the electrical plan, I think that to have a spark it:

1.press start button
2.the starter motor turns the engine
3.the voltage regulator detects the generation of current / voltage
4.a contact that closes in the voltage regulator, a contact that allows current to flow on the black and white wire which is connected to:

- from the ECU (EFI control Unit) (function: signal that the engine is running? / the ECU is starting its electronic management?)
- power relay (function: allow current on fuse F1 F3 F4)

5.the engine starter after injection and spark off, managed by the ECU

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in first test I would do this:

1 run the engine with the starter and check if there is 12v at the fuse F1 F3 F4

If ok: the power relay and voltage regulator contact is good

2. engine stopped, disconnect the connector from:

- the ECU,
- the power relay or voltage regulator

and check the continuity of the black and white wire between terminal 30 of the ECU and terminal 4 of the voltage regulator or terminal 2 of the power relay