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francois_payen

Engine cutting out randomly

My '02 nearly left me stranded yesterday coming back from work.  I was riding in the city at moderate speed when engine cut off completely without warning. 

 

I pulled over by the curb, put her back in neutral and tried to restart: the starter would crank but the engine wouldn't start at first.  That's when I noticed the ABS light was flashing.  I was about to call a tow truck when I tried to start again and this time it did. 

 

I rode for about 5 minutes before it cut off again.  I noticed the fuel injection warning light coming on, but it went away after riding for a bit.  So I managed to start again and then rode for about 10-15 minutes before it happened one last time (about 5 blocks from home), then I made it home.    

 

I'm obviously going to take it to a mechanic early next week, but just wondering if any others have had a similar problem, and what was the issue.  Except for the ABS light flashing, all other conditions seemed normal: Engine temperature, oil / coolant levels, etc.  The bike is an '02 with just a bit over 67,000 km on the clock.  According to the maintenance log I keep (and the service manual) my spark plugs should still be good for another 15,000 km (I replaced them all 20,000 km ago).  The only maintenance I've skipped is the second valve clearance check (7,000 km overdue) but only because it's a very expensive job to get done.  For everything else I've followed the service manual like gospel.

 

If you have any idea what this could be, let me know!

 

EDIT: Forgot to mention that this happened over a 20-ish km commute.

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Sudden shut-down, FI warning light, ABS light...these are all random electrical faults. My guess is you have a bad earth block. Time to pull the bodywork off, disconnect and re-connect all connectors, clean off corrosion and add dielectric grease as you go. Check the battery earth strap is tight. The earth block on the 6G is on the harness under the front cowl right side IIRC, a small rectangle taped into the main loom. I have read about these failing (corroding then melting) before.

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My quickstand position sensor actually felt like this fault... I went mad many times until i realised that the tiny oring on it was gone and dirt went on the contacts and caused the fault.
Anyway as they said before, sounds electrical. The quickstand is very easy to check and disable for a while to prove that it was the culprit.

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Thanks for the replies guys. 

 

At first I did suspect the kickstand switch too, but then I thought the starter wouldn't crank at all if it was the cause, no?  And it wouldn't explain the ABS light flashing on the dashboard.  Might be a cocktail of electrical gremlins, as Terry pointed out.

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You might have early signs of stator failure. Kentucky fried stator. Early 6th gens are famous for that.

 

Except your battery doesn't seem to be dying. Which would be the case if the alternator is starting to fry.

 

So it is very possibly the front wiring harness common ground connector. There's a thread of mine on here somewhere on that. I'll try to find a link.

 

 

 

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