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Old 11-07-2014, 10:02 PM   #1
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XR650R cutting out

So I sold the XR650R about 2 weeks ago......it ran great while I had it and for the first few days of the new owner.
Fast forward to a few days ago. New owner says it runs great and pulls hard but the engine will die if you are sitting at a light or pull in the clutch to coast. It won't start after it dies. Im almost certain its getting fuel but I don't think its getting spark....after about 30min-1hour it will start again and run fine like nothing ever happen.

It will run for maybe an hour or so and do it again.....I went to go look at it today and found the battery that runs the head lights(baja designs kit) was bad. So we rigged up a battery we got from Batteries Plus. My thought process was that the stator was trying to charge the bad battery and would eventually stop putting out voltage, hence no power for spark. Well I was wrong because its still doing it.....

I checked that stator/rectifier output and it was solid at 14V at idle and at mid RPM.

Would the coil cause this?
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Old 11-07-2014, 10:24 PM   #2
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I dont have an R

but my L's doing this could be the cdi .
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Old 11-08-2014, 12:05 AM   #3
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Could be the reg/rectifier heating up over time I would test it after 30-45 min of riding. When was the carb cleaned last?
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Old 11-08-2014, 06:39 AM   #4
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Quote:
Originally Posted by thebigman View Post
I dont have an R

but my L's doing this could be the cdi .
I thought about this but I would think it would do it all the time not just when it was hot

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Originally Posted by TomballD View Post
Could be the reg/rectifier heating up over time I would test it after 30-45 min of riding. When was the carb cleaned last?
I thought of this too about the R/R Ill have to test it afterwards. The carb was brand new about 1 year ago. The guy I first sold it too never rode it and let it sit so I originaly thought it was the carb but it runs and idles fine.
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Old 11-08-2014, 06:59 AM   #5
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Fuel filter a possibility? Just thinkin, when he is hittin the throttle, the line should have plenty of vacuum, but maybe not while at idle. Idunno, just an idea.
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Old 11-08-2014, 07:03 AM   #6
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I have heard of spark plugs doing weird when they go bad. It's worth 3 bucks to eliminate that part.
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Old 11-08-2014, 07:54 AM   #7
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When it dies and won't start back up immediately does it have spark?
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Old 11-08-2014, 08:37 AM   #8
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I don't believe it's the R/R, CDI, or fuel supply issue. My KTM 525SMR used to do exactly the same thing, it was the exciter coil (or pulse generator) failing.
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Old 11-08-2014, 09:16 AM   #9
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Quote:
Originally Posted by Patrick View Post
When it dies and won't start back up immediately does it have spark?
That I dont know....I want to say that when he tried kicking it over after it died it sounded like it wanted to start..and I think he said even backfired a bit. We rode it around yesterday and it was fine, as soon as I get home he calls to tell me it stopped again:faceplam:

Quote:
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I don't believe it's the R/R, CDI, or fuel supply issue. My KTM 525SMR used to do exactly the same thing, it was the exciter coil (or pulse generator) failing.
Was thinking this too.....

I am going to pick it up today and see if I can get it to fail myself. Then check for spark and such

Im gonna inspect the wiring harness for any cuts, check the stator to make sure it isnt burnt, check the coil for corrosion, and pull the spark plug.
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Old 11-08-2014, 09:22 AM   #10
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I've been researching this for you, and Honda calls those 2 ignition "coils" the exciter coil and spark coil...I've got $5 that says that's your issue.
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Old 11-08-2014, 10:14 AM   #11
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Quote:
Originally Posted by jetcycles View Post
I've been researching this for you, and Honda calls those 2 ignition "coils" the exciter coil and spark coil...I've got $5 that says that's your issue.

Thanks Jet, yea its located under the tank and mounted on the frame neck. Hopefully it shows signs of being bad (swollen, corroded)
Its got to be something simple because this bike is basic as !
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Old 11-08-2014, 10:22 AM   #12
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are the valves in spec ?

cdi or coil maybe
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Old 11-08-2014, 10:41 AM   #13
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Quote:
Originally Posted by BYRDMAN View Post
I thought about this but I would think it would do it all the time not just when it was hot



.
Next time it starts cutting out , take the cdi out and whack the back side with a screwdriver handle something of the sort .
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Old 11-08-2014, 10:46 AM   #14
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Check output voltage at the coils (that I mentioned) during cold startup and while idling. Ride the bike until it gets hot and cuts out (don't go too far!) and then recheck voltage when the issue presents itself.
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Old 11-08-2014, 04:23 PM   #15
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I'd bet coil too. My old Honda Accord did the same thing when I was in college. There was a small crack in the coil that would open the circuit when it would get hot. Let it cool down and it worked again.
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Old 11-11-2014, 02:50 PM   #16
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Quote:
Originally Posted by jetcycles View Post
I don't believe it's the R/R, CDI, or fuel supply issue. My KTM 525SMR used to do exactly the same thing, it was the exciter coil (or pulse generator) failing.
^this

Coil gets hot,stops working.

Coil cools off, works

change coil, problem solved, whoolie, profit.
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Old 11-20-2014, 03:20 PM   #17
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Did u sell this bike to a close friend? You sure are taking on problems for a bike that you already sold to another guy (should be his problem?) Either way, I want to buy my next bike from you, you seem to be going above and beyond the extra mile for this buyer.
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Old 11-20-2014, 03:34 PM   #18
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Quote:
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Did u sell this bike to a close friend? You sure are taking on problems for a bike that you already sold to another guy (should be his problem?) Either way, I want to buy my next bike from you, you seem to be going above and beyond the extra mile for this buyer.
Adam is definitely a good dude and has gone above and beyond trying to get it running again. Even repeatedly refusing to let me pay for parts and other odds and ends.

Maybe I'm not quite the dirtbag you are but I would offer assistance with anything I sold that went lemon in 5 days lol.

I like to think most people would but what the do I know.
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Old 11-20-2014, 03:45 PM   #19
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If he wants to bring it to me I'm sure I can find a donor bike to swap parts from. lol
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Old 11-20-2014, 06:37 PM   #20
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Quote:
Originally Posted by SideVinder650 View Post
Did u sell this bike to a close friend? You sure are taking on problems for a bike that you already sold to another guy (should be his problem?) Either way, I want to buy my next bike from you, you seem to be going above and beyond the extra mile for this buyer.

That's just me being me. For those who know me know that I am a man of my word and I'm passionate about motorcycling and the motorcycle community. I've i've gotten calls at 3 o'clock in the morning from friends who are with somebody who crashed that I went out to go pick up and take home who have never even met. I've sold various parts and helped the purchaser install them in my garage free of charge. I could go on and on but that's just what I do and that's just what I like to do.
In this case it's something I love very much super Moto, A bike that I spent so much money in running fine and then five days later after selling it cutting out on the new owner. Although I'm not obligated to help him fix I want to help out a fellow new super Moto guy, and have him show up on future rides and track days.
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