Grand Prix 125
Main Motorcycle: Thruxton
Join Date: Jun 2012
Location: Mesa, Arizona
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I have a 2012 Thruxton, about a month old now that every once in awhile only turns over a split second when pressing the start button. Pressing it again causes it to turn over another split second but still fail to start. If I press and hold the start button, it will turn over a split second and then after a very predictable amount of time (about 2 s) turn over and completely start.
I'd diagnose it as a glitchy sensor, button contacts, or relay if it weren't for the fact that pushing the button always causes it to turn over, if only for a split second. I'd diagnose it as a dying battery if it weren't for the fact the bike is a month old and ridden for 30 minutes at a time twice a day. So, I'm a bit confused and wondering if there is some sort of ECU involvement on the EFI models starting circuit? Perhaps a voltage brownout when initially engaging the starter?
Same problem.Read my thread titled "wierd thing happining at start up".It will explain.Seems to be the clutch safety switch.When it happens just pull and release the clutch lever once or twice then hit the starter button again.Problem comes and goes.Nothing to worry about.
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