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Hey all, my 2012 Kawasaki KLX140L won't start. The starter motor will spin just fine, but the engine won't turn over. I mean, it may give one exhaust note every few seconds, like it catches once, but mostly it's just a whining sound from the starter and gears.

At first I just assumed the starter motor little gear on the end was just worn, without doing much diagnosis. So I purchased a new starter and replaced it. Same problem.


Upon further inspection, the starter motor is spinning the idler gear set just fine. I removed the cover and spun the starter while pressing against the larger gear to keep it in the cavity. It spins with the starter.

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So then it must be the gear behind that, that disappears into the case. I put a "??" on my photo of this gear. I can spin it with my fingers easily...it will spin both directions, but sometimes gets hung up when trying to spin it clockwise, if I recall. What is this gear and is this normal? I would guess this might be connected to the flywheel, and if I can spin it with my fingers, well, that would be bad.

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Is this a common issue I might be having? I'm unable to search out anything with my symptoms. What might be my next steps at diagnosing, and/or fixing!?

Thanks for any help,
 
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