SOS - ST1300 stalling after idle adjustment

JingleJ said:
Had the chance to ride the bike to/fro work today, after riding for a period of time and after revving the engine above 4K RPM, observed lost of power and intermittent power surges again.
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Igofar said:
....... plugged stuff back In wrong maybe?
Would not be the first time.
.
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Happened to me first time I went in there. Not plugged wrong, but one hose not fully engaged and disconnecting, causing symptoms similar to @JingleJ
 
You didn't happen to use any silicone spray, or anything slippery to install the hoses did you?
Sounds more and more like an air leak from the hoses.
Is the bike throwing any codes?
Is the FI light remaining on?
Sounds like you may be in "limp home" mode.
Try reading the codes, then clearing the codes.
It may be a historical code.
YES, a starter valve sync would definitely help smooth things out, and possible solve the stalling issue.
I would also very carefully check all the FI wires and look for chewed wires.
Most commonly chewed wires are usually behind the TB housing on the left rear wires for some reason.
Good luck, keep us posted.
 
You mentioned loss of power, and riding above 4K RPM etc.
IF you are getting an FI warning light, you should check the codes.
If you have a light showing, and you clear it, providing it clears, then if it re appears it should be an ECU issue.
 
Igofar said:
You didn't happen to use any silicone spray, or anything slippery to install the hoses did you?
Sounds more and more like an air leak from the hoses.
Is the bike throwing any codes?
Is the FI light remaining on?
Sounds like you may be in "limp home" mode.
Try reading the codes, then clearing the codes.
It may be a historical code.
YES, a starter valve sync would definitely help smooth things out, and possible solve the stalling issue.
I would also very carefully check all the FI wires and look for chewed wires.
Most commonly chewed wires are usually behind the TB housing on the left rear wires for some reason.
Good luck, keep us posted.
Click to expand...
So far cables seems fine as in fact just replaced the sub wire harness that connects to all the injectors.

Have reinstated the vacuum line, I did use silicone spray on the 5 way tee but made sure it was dried before putting the octopus back. There shouldn’t be any leak.

Now exploring other potential failure, maybe the spark plugs or the wires connecting to it. Or else could be the fuel line, mainly fuel pump or regulator.

Current symptoms, able to ride at highway speeds but surging now happens even at 4K rpm. Noticed high temperatures will worsen the condition.

Just hoping that it’s not the ECU now. Fingers crossed.
 
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