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Testing voltage from a 3-phase stator (???)

Discussion in 'Motorcycle Tech Talk' started by Matt51F1, Apr 12, 2012.

  1. Matt51F1

    Matt51F1 Member

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    Hello!

    I know people are going to say that there is a post in tech tips about testing a stator but in all the posts on all of the sites that I see, there is a common thing missing.... Where does the common connect when trying to get a voltage reading?

    I have a 2005 TDM900 (was never sold in the USA - it was a natural progression from the TDM850). Very popular in continental Europe and they have a tendency to polarise the attitude of the rider - you either hate 'em or love 'em. Electrics are 3-phase stator + Shindengen MOSFET R/R (FH001, 35A, 200v)

    Now - my problem is that the battery is not charging. The manual says to check the resistance across the wires of the stator (should be 0.18~0.28 ohm - my readings come in at 0.7~0.8 ohm). Next thing I try to check is the voltage out of the stator (should be 60-70 volts per phase) but I am getting 0 from each.

    The only thing I can concluse is that either my stator is completely stuffed or I am not getting a good earth. I have tried multiple points on the bike except for the battery -ve terminal and have been advised to not go the black wire that is the output from the R/R as it will blow the computer.

    I just need to determine that if my problem is not the stator then I can replace the R/R but it is the determination that is the issue. I will also need to order from the USA (shares some parts with the early R1) as a new stator here is over $600 and R/R over $240.

    I saw one post somewhere that if the magnets on the end of the crank hold onto the generator cover as you pull it off, then the stator is stuffed - but that sounds like rubbish to me.

    I do not go to bike shops here in Brisbane as most of them are staffed only by kids who want to sell you a bike or a jacket and don't know much else. When you walk into a service department and need to explain and describe what a mini glass fuse is to the idiot behind the counter, you decide that they will *never* be putting a spanner on any bike you own.

    Any advice that anyone has would be greatly appreciated.
  2. baggerpaul

    baggerpaul Well-Known Member

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    Hello sir and good evening . If you have a wiring diagram of this stator set up and would like to email it to me I will be more than happy.to look it over and help you . I am very good at electrical diagnosis .and do this for a living . I will be happy to help you if you would like to email this info to me . What has me kind of concerned is you have 0 voltage period allmost sounds as there is an open circuit you should have something present in ac voltage it is a large magnet that is constanly spinning! Very odd . Or it may be that the stator assembly is completely shorted to ground in the case! And the main fuse link is burnt . I have to look at the diagram to see how its wired. Hope to help ya .
  3. Matt51F1

    Matt51F1 Member

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    BaggerPaul,

    Hello and thank you for the offer. I have the full workshop manual with all of the diagrams but I have since discovered a site that can tell me how to test the stator.
    The problem is that I was told to test it (a 3-phase AC type) by putting the positive connector into one of the plug slots and touching the negative to a bolt on the engine.
    This is wrong as it does not work.
    Being an AC-current producing device, I was corrected and told that to test the voltage output, you put the negative test electrode into one of the other two slots and testing between all 3 connectors as positive and across the poles, it should yield 60-70 volts each.
    Unfortunately, I found all of this out /after/ taking the stator out and mailing it away to someone to have rewired (since the replacement OEM part here in Australia is over $600 and it is near impossible to locate someone who can order in an after-market equivalent for the prices I see advertised in the USA. What makes it harder is that Yamaha used that part number for that bike alone and non only can I not cross-reference it to anything else - that bike was not sold in the USA, so there is no part for it over there.
    Trying to find dimensions of the stator is next to impossible but I think it would be very similar to that found in the 2002 YZF-R1.

    The offer of assistance is appreciated nonetheless and if you would like a copy of the workshop manual or an extract of the electrical section for your own perusal, I will be happy to send it to you :)

    Thanks

    Matt
  4. baggerpaul

    baggerpaul Well-Known Member

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    thank you sir for the offer . but i wont need it i just wanted to see how the regulator and stator were wired to help a fellow biker is all . hope you get a quality . stator in return . and your back to riding all the best to you . and if there is any thing else we can help you with in the futre let us know here on the forum.:cheers:
  5. Fatboy128

    Fatboy128 Well-Known Member

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    Holy cow! "Sir" "Thank you" What happened to you Paul?!?!? Where's the real Bagger, what did you do with him you body snatcher you! :rant:
  6. baggerpaul

    baggerpaul Well-Known Member

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    Don't want to scare the new guy away gumba! We need some newbies on the forum.! All bull **** aside my old man did raise me proper I just don't know what happened! Lol
  7. Fatboy128

    Fatboy128 Well-Known Member

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    :roflmao::roflmao::roflmao:
  8. Matt51F1

    Matt51F1 Member

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    Uh yeah - I kinda wondered about the "sir" and such and thought that I had just met an overly polite person.

    No such niceties required with me though ;)
  9. Matt51F1

    Matt51F1 Member

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    Oh wow... I completely forgot about this forum (sorry to everyone.... I tend to not spend much time on forums as I work on computers all day - so you kind-of tend to avoid them at night....)

    Nobody will believe it but this same bike is having the same problem again :/
    Yes - I still have it although it is now at 206,000 km on the clock.

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