Momentary voltage drop? / check engine light

Thank’s I will order
Thnks for the tip will measure it with my multimeter. I have a ctek charger and the connection cable that’s attached to the bike have three diods, green - yellow - red that show the battery charge and if I don’t ride for a week the yellow diod is blinking so I think the the battery is done for. I’ve had the bike for three years and the battery wasn’t new when I bought it and winters get kind of cold here in Sweden.
 
Thank you, great info!
I have been reading about tune ecu quite a bit but haven’t had a reason to get it. But now I will buy tune ecu and a cable.

However it will take a while to get the cable. In the meanwhile can I check error codes and clear them with an odb scanner for cars or is it a special scanner? The season is coming to an end here in Sweden so want to ride
 

Just about any scanner will read and erace cods
They will not give data like the tuneecu will.
 
If you tried to start with a dead battery and it failed, it will sometimes set the CEL. That particular code will usually clear itself after a few successful startups (I believe it's 3 good cycles). Sometimes it won't though. Worst case, if you can't get ahold of a reader, disconnect the battery cables from the battery and touch them together (to drain any residual charges), wait about 30 seconds or so and hook everything back up.
 
Great info will try that tomorrow
 
I always put mine on a battery tender when it's parked. My original 2005 battery lasted 11 years, the second one is 8 and going strong.
 
Hawk said:
That’s really good longevity! Will also do that in the future, sometimes the bike sit still for weeks…
Click to expand...
I still have the original battery. It lives under the work bench and I use it for test powering things. I charge it a couple times a year and it's still working. It must have been made on a Wednesday.
 

Along with my Fluke meter, I installed one of these to keep me aware of the voltage condition while riding. It will flash if over/under charging and is made by Kuriakyn. The only issue with this particular model is that it isn't water proof. I took the cover off it and sealed the joints with clear silicone seal to address that. There are other models made that you can use. At least something like this will give you some warning that you have a charging issue instead of leaving you on the side of the road with a dead battery.
 
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