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Thread: Pulser Coil

  1. #1
    Member queenpdog's Avatar
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    Hi guys,

    I'm in need of a little technical help, an unfortunately, electronics aren't a real strong point for me. I recently replaced the chain and sprockets on my SO's 2006 TW. After getting everything back together I tried to start the bike with no success. I narrowed things down pretty quickly and discovered I wasn't getting any spark. I did a little research and gathered that I had probably crimped one of the wires when I put the cover back on.



    I took the bike apart again and discovered that I had pinched the "pulser coil" wires. Actually, they had been severed straigt through on both the red and white wires (brilliant, I know). Well, I got to work and spliced in a few wires, soldered them, wrapped the wires in the shrinking tube stuff, taped them all up, put the cover back on being very cautious this time.........Ahhhhhhhhhh!!! Still no spark.



    I took the cover off again and honestly, everything looks really good. I'm comfortable with my solders and all. After talking to my pop, who knows just enough to be dangerous, he suggested that the solders could be causing enough resistance to interfere with normal function. I have a volt meter, but I don't really know what I'm doing with it. Can anyone tell me if my fix "should" work? If not, I'll order up the Pulser Coil and replace the whole thing. If soldering shouldn't be a problem, how would I test the connections to see if my fix is solid.



    Thanks so much for your help!!



    Julia
    Two Wheels Good



    2001 TW200

    2009 Triumph Street Triple R

    2006 TW200 (SO's)

  2. #2
    Senior Member FortPayne's Avatar
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    Someone will have to translate pulse coil... The manual lists them as pickup coil and source coil. On mine green and white is the pickup coil which is easily replaced. The source coil is part of the stator assembly and for almost all of us must be replaced as a whole. Very expensive.



    Pickup coil- set the ohm meter to 200 setting and you should get 650-790 resistance (give or take a decimal place depending on your meter) between white and green. Mine is in the 800 plus range and works fine. If its blown it will be way off or show no continuity at all.



    Source coil - same setting you should get 400-450 between the brown and yellow wires.
    cowboyjeff likes this.
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  3. #3
    Member queenpdog's Avatar
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    The component I'm talking about is shown on this pic as #3. It looks like it could be replaced by removing two allen bolts and unplugging from the ignition system by the battery. Forgive me please for my limitied knowledge of terminology. On my bike the wires are red and white.



    Two Wheels Good



    2001 TW200

    2009 Triumph Street Triple R

    2006 TW200 (SO's)

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  5. #4
    Senior Member FortPayne's Avatar
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    3 is the pickup coil, and it's my lack of terminology. Most other bikes call one a pulsar coil but not these.



    CHECK THE RESISTANCE of the red and white wires FIRST! Check it close to the coil if you remove it. Make sure you need to replace it before you go through all the trouble. Trust me on this!



    The pickup coil is easily replaced and not too expensive. It is year dependent, so watch what ya get.





    Side note: 06 is the best lookin' year IMO. Don't tell my '94
    cowboyjeff likes this.
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  6. #5
    Member queenpdog's Avatar
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    Thanks so much for responding on this. One thing I want to clarify....again, I'm a noob with electronics. So my meter has black and red probes. I'm thinking that I poke the red one into each wire (red and white) individually, and use the black as a ground? Please forgive my noobness, but do I do this with the key on?



    Another question, if I find out that this unit is good and my solders are solid, etc....is there another component that might have been "blown" by my crimping these two wires? Just wondering what the next logical step is. Would soldering cause enough power loss to make the pickup coil not work?



    Again, thanks for your help. I really appreciate it!
    cowboyjeff likes this.
    Two Wheels Good



    2001 TW200

    2009 Triumph Street Triple R

    2006 TW200 (SO's)

  7. #6
    Senior Member operose's Avatar
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    You are checking the resistance of the pulser coil, so you want to connect each probe of your meter to the two wires coming out of the pulser coil. If these are the only damaged wires, they are likely your culprit.
    cowboyjeff likes this.
    ITCB

  8. #7
    Senior Member Fishman393's Avatar
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    Hey queenpdog, when I got my T-dub it had this same problem. I had to replace the pick-up coil (pulser coil)they are about $60 bucks from dealer. you may want to get a new seal also since you have had it on and off twice already...
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  9. #8
    Member queenpdog's Avatar
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    Guys,

    I'm back for a few more annoying questions. I DO appeciate your help thus far!



    OK, I have been able to check resistance on the Pickup and Source coils on the '06 TW (which is the non-running bike at this time) and also, my '01 which is starting and running well. The nice part is being able to compare measurements between the two bikes.



    Where I am confused is that my readings don't match up at all with what the ideal values are for each component. I have made my measurements with the coils "in the bike", and I wonder if that is the problem. If each coil was removed from the bike I'm assuming the readings would be more accurate. In this case, I think I can make the determination that the Pickup coil needs to be replaced.



    SO, on my '01 (the running bike) with the multimeter set to 200 ohms, I get 1 and 1 for the pickup and source coils. When I switch the setting to 2k, I get .820 and .787 or pickup and source respectively.



    On the '06 (non-running/sparking bike) with multimeter sett to 200 ohms, I get .6 for the pickup and 1 for the source. Switching to 2k I get .005 for the pickup and .770 for the source.



    Obviously the pickup reading for the non-sparking bike is way off and my assumption is that I need to replace it. I guess my real question is about why my readings are so far off from the ideal values listed in the manual. Can I call this diagnosis accurate even though the coils are still in the bike and proably picking up readings from other components as well?
    Two Wheels Good



    2001 TW200

    2009 Triumph Street Triple R

    2006 TW200 (SO's)

  10. #9
    Senior Member FortPayne's Avatar
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    Had to edit my post...

    No the coil doesn't have to be removed for the readings.

    As I mentioned, my pickup coil is also out of spec and works fine. I don't know. Best guess is Yamaha has the resistances a little off in their specs, or coils have a larger tolerance range than expected.



    I would say your assumption was right. Replace that pickup coil and be done.



    Thats the one you soldered right? If you get time why not cut off the solder and get a reading from what remains of the original wire. Just for our curiosity as it were. I would like to know myself if solder would affect the coil so much or if it just burned up when the wires were crushed.
    cowboyjeff likes this.
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  11. #10
    Member queenpdog's Avatar
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    Parts are on order, and I hope to get them and have time by the weekend to replace the pickup coil. I'll let you know about the resistance after removal. I'm curious, too. I plan to test with solder in place as well as after cut out.



    Wish me luck on the replacement. Hopefully I won't screw up anything else!
    cowboyjeff likes this.
    Two Wheels Good



    2001 TW200

    2009 Triumph Street Triple R

    2006 TW200 (SO's)

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