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post #1 of 101 (permalink) Old 12-28-2015, 10:02 PM Thread Starter
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Starter motor failure?

After replacing stator and battery a few months ago, a slight hesitation on cranking occurs when starting, successfully firing up 90% of the time I might add, when cold it would stop cranking half way to start.
Took it to the mechanic and ruled out the charging system and/or battery voltage and health. (Returning 14.3V)
What worries me is that the "hesitation" on cranking will damage the infamously sensitive sprag! Anyhow.. I'll take the starter motor out and try to find a coupled copper field inside (maybe a good clean and some prying the gunk off will fix it) or some obvious sign of short circuiting on the coils before I pull the trigger in a new or eBayed replacement...
Thanks for the input, any ideas? suggestions or testimonies welcomed!
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Last edited by Nicspeed; 12-29-2015 at 12:08 AM. Reason: Grammar
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post #2 of 101 (permalink) Old 12-28-2015, 11:57 PM
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When my 07 did this, it turned out to be the wiring harness going around the headstock. It would only happen when the bars were turned at a certain angle. The bike would sometimes die pulling into a parking space because of this. Simple fix that's worth checking.
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post #3 of 101 (permalink) Old 12-29-2015, 12:05 AM Thread Starter
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I haven't got symptoms like dying when parking, just to be safe I tried moving the cables on that clamp but no flickering on the instrument cluster either... Thanks for the input!
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post #4 of 101 (permalink) Old 12-29-2015, 08:39 AM
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I would check the voltage at the starter to make sure it is getting full voltage immediately as the starter button is pushed.
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post #5 of 101 (permalink) Old 12-29-2015, 10:19 AM Thread Starter
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Good call there... That would check for faulty connections! Too bad I don't have a tester and I feel awkward re visiting the mechanic without leaving the bike with them...
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post #6 of 101 (permalink) Old 12-29-2015, 12:21 PM
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When I had starting issues (before wiring upgrade), my former mechanic said the starters could get filthy and be temperamental. I pulled mine apart and gave it a clean, though it wasn't too dirty and brushes were in good condition. Did seem to start better afterward, but it was very short lived.....then I did the wiring upgrade. Mine was an 05.

P.S. Pulling the starter motor apart came with a warning, but I can't remember what it was. Either way, I was able to work it out, so anybody could.

Last edited by Ferris; 12-29-2015 at 12:26 PM.
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post #7 of 101 (permalink) Old 12-29-2015, 01:54 PM
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Ferris can you please explain the "wiring upgrade"? Thanks.
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post #8 of 101 (permalink) Old 12-29-2015, 02:55 PM
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Quote:
Originally Posted by Mike.Gayner View Post
Ferris can you please explain the "wiring upgrade"? Thanks.
There's an old thread on this mod that I'm sure DEcosse or someone could point you to.

Basically replacing 3 starter wires from 8 gauge to 4 gauge. Though 2 of those are usually run parallel with oem, so as not to mess with loom. Think that's it?
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post #9 of 101 (permalink) Old 12-29-2015, 03:17 PM
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I believe you mean the Starter Power Mod
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post #10 of 101 (permalink) Old 12-30-2015, 10:23 PM Thread Starter
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Well after a rather painful 2-hour process I disassembled the starter motor, cleaned the brushes and copper contacts' grooves and wiped the magnets. Other than having the cleanest starter motor on the block nothing has changed, I guess better take it to the shop and let them deal with the problem hunting, probably better than keep on damaging the sprag.

Last edited by Nicspeed; 12-30-2015 at 10:44 PM.
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