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post #1 of 11 Old 12-11-2013, 08:59 AM Thread Starter
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Not starting

Did a search for starting problems and found some good advice, but, I didn't find the exact same problem I am having.

During Thanksgiving Holiday, Saturday, I went out and started the bike just to make sure would start, been about a week since I had ridden. Started fine, let idle for a bit, happy as a clam.
Tuesday morning came, not raining and in the 40's so I am gonna ride to work. Starter just spins, and spins. Does "catch" one time and backfires. Fuses are good, battery is very strong. At a complete loss. When turn switch on the fuel pump runs, lights on "dash" come on and go off, kill switch operates as normal. Key switch on, kill switch off, nothing, kill switch on, regular noises and lights, starter just turns. Bike is stored in garage so should be no water issues. Haven't had a lot of time to get elbow deep in it yet. Any help would be greatly appreciated. Also, as far as I can tell it is all factory, no PC, no hacked wiring in tail section, that I have seen.

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post #2 of 11 Old 12-11-2013, 09:02 AM
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I'd start with the battery. Make sure it's good with a load tester (lights on doesn't mean its capable of outputting the amperage required for start.) Besides that if it spins every time, but does not catch, I would look at the sprag clutch. You'll need a stator puller to get at it. I'm not exactly sure of how to check if it is good or not, short of spinning it by hand. If memory serves correctly I was able to get it to 'lock-up' by turning it the appropriate direction with the starter reduction gear/shaft removed.

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post #3 of 11 Old 12-11-2013, 09:08 AM
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If this is a 919 (assuming) my first guess would be a PC or the ground wire under the tank is loose. In my experience, if the battery has enough juice to crank over, she will fire if she's got gas. May not run very well and may still need a new battery, but I push started mine a few times on a dead battery and it still ran great. It just wouldn't charge the battery.

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post #4 of 11 Old 12-11-2013, 09:08 AM
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Check your plugs. If cylinders 2 & 3 plugs are wet compared to the other 2 then you need to replace your fpr (fuel pressure regulator)

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post #5 of 11 Old 12-11-2013, 09:50 AM
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KISS Principle here.

We know OP started the bike and let it idle, never rode it. This means the battery never got charged. For all we know, the battery was likely depleted enough.

Engine did catch once. I say its the battery. Give it a full charge and then test it under load.

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post #6 of 11 Old 12-11-2013, 03:57 PM
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Dechoke it when pressing the starter button.

By dechoke, I mean hold the throttle wide open while cranking. The ECU sees this and cuts off the injectors, allowing the cylinders to clear of any residual fuel. It's common on most post 1995 fuel injection systems, and I know that the 919 has that feature. Once it starts get on it and go gently until it attains operating temperature: do not warm it up first! This insures that the cylinders are clear and it will probably give no further problems. If the trouble recurs check the FPR for a diaphragm leak.

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post #7 of 11 Old 12-11-2013, 04:30 PM
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Quote:
Originally Posted by robtharalson View Post
Dechoke it when pressing the starter button.

By dechoke, I mean hold the throttle wide open while cranking. The ECU sees this and cuts off the injectors, allowing the cylinders to clear of any residual fuel. It's common on most post 1995 fuel injection systems, and I know that the 919 has that feature. Once it starts get on it and go gently until it attains operating temperature: do not warm it up first! This insures that the cylinders are clear and it will probably give no further problems. If the trouble recurs check the FPR for a diaphragm leak.

Rob
Had to do this in 2011 Spring, as per Rob's recommendation at that time as well. A ton of black smoke came out when it was trying to fire back up from hibernation. It worked

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post #8 of 11 Old 12-12-2013, 06:20 AM
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Rats!! Check for evidence of rodent infestation...they love to chew on wires, especially on a bike that someone just warmed up for them

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post #9 of 11 Old 12-12-2013, 06:31 AM
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Quote:
Originally Posted by Whiplash97 View Post
Rats!! Check for evidence of rodent infestation...they love to chew on wires, especially on a bike that someone just warmed up for them
+1
I had a nest filling my whole air filter when I bought my 9er.... really opened up the powerband when I cleared it out

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post #10 of 11 Old 12-12-2013, 08:58 AM
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Quote:
Originally Posted by badmoon692008 View Post
+1
I had a nest filling my whole air filter when I bought my 9er.... really opened up the powerband when I cleared it out
me too! there should be a pic in the gallery.

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post #11 of 11 Old 12-18-2013, 06:27 AM Thread Starter
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Update. Last night she started!!! Did as robtharalson suggested. Held throttle wide open, cranked on it,let throttle go tried again, and sounded more like it would start. Did this a few times, and while throttle wide open, she started. No backfiring, no smoke, ran rough for a few seconds, then back to normal. Rode a few miles, easy at first, then a couple of "brisk" 0-90ish runs. Came back home turned off, and has cranked every time since. Thanks for all the advice!!

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