Suddenly won't start

[zed9]

Originally Posted by Smoky

Haven't had any time last coupla weeks to further diagnose my no start issue.  While I have it apart I'm gonna double check timing then try to start again

If it starts while priming then your timing is good.
Something happens once primed or when the ignition is turned on and takes as long to happen as the priming sequence. Something with the throttle plates?
Has your ecu ever been flashed? (I can’t remember if you discussed this).

[Smoky]

Timing is dead on according to the manual and timing marks.Bike won't hit at all. Not been flashed.

[zed9]

Originally Posted by Smoky

Timing is dead on according to the manual and timing marks.Bike won't hit at all. Not been flashed.

Just spit-balling here…

It’s almost as if, after priming, there is no fuel pressure to the injectors or there is fuel pressure but the ecu is not asking them to spray. Or the spark plugs aren’t firing. The problem is definitely electronic in nature.

Have you confirmed spark AFTER the initial priming sequence has ended?
 To do this you would have to prime/start the engine then with the key still in the "on" position (so as not to initiate another priming sequence), pull a plug and crank the engine to verify you still have spark.
If you try this you must stuff a rag over the spark plug hole because if there is spark and gas vapor, an explosion could result.

[GatorZ]

Excuse my ignorance. I haven't read the whole thread.
But has he tried a scan tool  OBD2 scanner?

[Smoky]

No. I have cheapie scan tool haven't tried it. Adapter needed?

[zed9]

Originally Posted by Smoky

No. I have cheapie scan tool haven't tried it. Adapter needed?

From what I understand, you do need an adapter. Unfortunately. But the scanner tells you a lot and can clear codes.

[GatorZ]

Maybe this will help?
https://www.aliexpress.com/i/1005002017962545.html

[Smoky]

Looking like head or head gasket

[Smoky]

Thanks Gator Z
Ordered it today.

[Smoky]

Hey Gator Z or anyone else. I have scan tool adapter now but it won't connect. Mines a '21, I use clear connector on bike? What mode on scan tool? Can't connect....looking for some guidance please