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03 Chopper: spark and fuel, no start.

Discussion in 'Technical' started by PUBKEEPER, Mar 2, 2016.

  1. PUBKEEPER

    PUBKEEPER Member

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    Howdy all. After searching for 2 days, I can't find a thread with the same issues I am having. Getting good fuel, good spark, turns over, won't fire. I had the battery load tested and it's good, 500 cca. Not sure where to go from here, any thoughts?
     
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  2. chubs

    chubs Well-Known Member

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    :oldconfused: timing? :oldconfused:
     
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  3. FrankBDPS

    FrankBDPS Well-Known Member

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    What do the plugs look like? Have you flooded it?
     
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  4. PUBKEEPER

    PUBKEEPER Member

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    It's not flooded, I pulled the plugs(less than a year old), cleaned what little soot was on them when I verified spark, and they weren't wet. Seems like a timing issue Chubs, but why would that suddenly change with the bike sitting for maybe a month since last start?
     
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  5. 05chop

    05chop Well-Known Member

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    Do a quick spark plug change then do a compression test with a gauge or rubber tip air gun.Could have to heavy of motor oil
     
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  6. PUBKEEPER

    PUBKEEPER Member

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    I'll give it a shot tomorrow and get back. What weight do you run?
     
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  7. 05chop

    05chop Well-Known Member

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    I live at 6200 feet still cold up here just remember your motor should spin really fast so I run mobile one 20-50.Do the easy stuff first
     
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  8. Marky-Marc

    Marky-Marc Well-Known Member

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    Fuel, spark, air and you have all of them...are you testing spark AT the spark plug or at the END of the spark plug wire?
     
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  9. Marky-Marc

    Marky-Marc Well-Known Member

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    @PUBKEEPER, did you change your oil? Reason being, the crank sensor is next to the oil filter...make sure it's on TIGHT! If you pushed or wiggled it a little while taking oil filter off, bike won't start...keep it simple brother.....

    Here's a link to a photo of the crank sensor...hope it helps...but if you have air, fuel and spark...it's could be your crank sensor, either wen't bad or connector is loose....

    http://www.bigdogbiker.com/threads/good-coil-no-spark-to-the-plugs.33108/
     
    #9 Marky-Marc, Mar 2, 2016
    Last edited: Mar 2, 2016
  10. Brew

    Brew Troop Supporter

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    How old is the gas and when was it last running? The spark plugs are wet with gas correct?
     
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  11. BWG56

    BWG56 Guru

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    He said it was running a month ago
     
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  12. Little-Boo

    Little-Boo Well-Known Member
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    Marky the 03 don't have a crank Sensor. They have a cam timing sensor of some type located on the cam cover. I have never worked on one so I just watch from the side lines :oldlaugh:

    Carlos :eek:
     
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  13. FrankBDPS

    FrankBDPS Well-Known Member

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    Carlos is correct. The 107 did not use a cam sensor. If the bike was running a month ago it has got to be something simple. To me if you have a good strong spark I would look for a fuel issue.
     
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  14. chubs

    chubs Well-Known Member

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    :oldthumbsup::oldthumbsup: Good point Frank. How do we know that it's getting fuel to the cylinders? Maybe try pullin the plugs out and giving each cylinder a small shot of gas, put the plugs in and see if she fires? That might narrow things down a little bit, but I have no clue how to check if fuel is getting through the carb. Just a thought. :oldconfused:
     
  15. Mr. Wright

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    Take the air cleaner off, and look inside while you twist the throttle. You should see the gas squirting into the intake if gas is going through the carb.
     
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  16. chubs

    chubs Well-Known Member

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    DOH ! :oldcrazy: I told ya I aint the shiniest spoke in the wheel ! :nonod: I shoulda known to do that !!:yesnod:
     
  17. Marky-Marc

    Marky-Marc Well-Known Member

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    Good to know bro....never worked on one either, but either way, crank sensor or timing sensor, if it were out, it wouldn't turn over correct? I am now correcting myself...hahahahaha
     
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  18. Mr. Wright

    Mr. Wright Guru
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  19. chubs

    chubs Well-Known Member

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    I'm probably wrong here Marc, but, I believe it would turn over. If it was one of those sensors, would the coils fire? Would it fire the coils, but at the wrong time? :oldconfused: I'm thinking you're a lot smarter than me, so I'll go with whatever you say! :cheers:
     
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  20. chubs

    chubs Well-Known Member

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    :hi: Shouldn't it crank over, but just not have spark? :oldconfused: Or would it have spark at the wrong time? :oldconfused: I'm starting to lean more towards a fuel, or lack thereof, problem.:skep: ( I really hope it's not something like I did, when I had the fuel valve in the wrong position! The cost of education keeps going up!! :crazybitch: )
     
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