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1990 Yamaha FZR250 3LN

Discussion in 'Yamaha 250cc In-Line 4's' started by kiffsta, Jan 30, 2012.

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  1. kiffsta

    kiffsta Senior Member

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    Hey

    Phil and I picked up a FZR250 on the weekend, she is a bit tired and weathered. We chnagend the oil and cleaned the plugs and she fired up and ran and sounded quite strong. She is a tad rough, but Im confident we restore her to her former glory.

    Cheers

    Chris
     

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    kiffsta, Jan 30, 2012
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  2. Slender

    Slender Well-Known Member Premium Member

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    nice one mate, oem scheme too! :Thumbs_up:
     
    Slender, Jan 31, 2012
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  3. paint-your-ride

    paint-your-ride Well-Known Member Premium Member

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    looks preety sweet that one chris sure it will be great when you sort it out  fully
    :Thumbs_up:
     
    paint-your-ride, Feb 2, 2012
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  4. kiffsta

    kiffsta Senior Member

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    Hmmm, fzr's. I have rebuilt the carbies twice, it finally ran sweetly today, but it's not consistent, I can hear a relay going crazy when I'm cranking it, I think there is some dodgy wiring in there, now to find it.


    Does anyone have a 3ln wiring diagram ?
     
    kiffsta, Feb 12, 2012
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  5. Slender

    Slender Well-Known Member Premium Member

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    I have one pm me ur email and I'll send it through
     
    Slender, Feb 12, 2012
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  6. Slender

    Slender Well-Known Member Premium Member

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    Good luck mate I found they fight you all the way. What did u set your mixture screws at by the way?
     
    Slender, Feb 13, 2012
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  7. kiffsta

    kiffsta Senior Member

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    fight me yes sir indeed... but I think I have found the problem, I think I have a dodgy coil,  when I power the bike on and turn off the kill switch, I hear the exup valve open and close, then I try and start it,  the strater cranks but there is no spark. I keep flicking the kill switch on and off and eventually I hear a clicking sound from the head, after closer examiniation I can safely this is coming from the coils which I get spark, but its weak, time to source some coils I think.
     
    kiffsta, Feb 13, 2012
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  8. Slender

    Slender Well-Known Member Premium Member

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    Hopefully u get it sorted mate. They can be an awesome bike once all the bugs are gone :)
     
    Slender, Feb 14, 2012
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  9. Zealous

    Zealous New Member

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    Here's a document I come across recently which may be of interest to you 3LN owners.

    I haven't seen it before.

    3LN Specifications Guide:
     

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    Zealous, Feb 23, 2012
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  10. JakeFzr250

    JakeFzr250 Member

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    Hey would you be able to email me wiring diagram jws@outlook.co.nz
    And also would you know why my oil light won't turn off on 1989 fzr250r
     
    JakeFzr250, Dec 19, 2016
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  11. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Hi Jake, welcome to the forum. Best you make a thread and introduce yourself rather than dig up old threads. The dates on posts can be easy to miss :)

    About the oil light, the 1989 3LN1 has an oil level sensor. So either the oil level is low (hold the bike level and check the sight glass under the clutch cover, right hand side of the bike) or it is clogged with gunk. That can happen after nearly 30 years of wear and tear.

    I think the sensor is bolted into the sump. You might have to take off the exhaust headers to get at it, you definitely have to to get at the oil filter on a 3LN1. Take it out and soak it with kerosene or similar and watch all the gunk fall out of it. Others that have 3LN1's can give you more specific details @GreyImport
     
    Linkin, Dec 19, 2016
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  12. JakeFzr250

    JakeFzr250 Member

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    The sight is really gunked up so really hard to see but I will try that and let you know!! Thank you
     
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    JakeFzr250, Dec 19, 2016
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  13. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    If your sight glass is not clear then your oil level sensor will be full of crap no doubt , as mentioned

    Ive never cleaned mine so my oil light is on pretty much all the time .... but Ive ridden thousands of Ks like that

    Have u changed the oil and filter lately? .... the only way to know the correct amount is in there is to measure it as u put it in .

    Check here to make sure what model u have as filter position and oil level sensors changed to pressure senders in later models

    http://2fiftycc.com/index.php?threa...0-3ln-bodywork-frame-engine-carburetors.3469/

    Oil level sensor that sits internally in the sump on a 3LN1

    oil level sendor.jpg
     
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    GreyImport, Dec 19, 2016
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  14. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    GreyImport, Dec 19, 2016
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  15. JakeFzr250

    JakeFzr250 Member

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    I'll need to clean out the sump then cause it's really annoying but yes I change oil and filter today so level is correct
     
    JakeFzr250, Dec 19, 2016
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  16. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    2.2L of oil?
     
    GreyImport, Dec 19, 2016
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  17. JakeFzr250

    JakeFzr250 Member

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    Yes of oil was given full service just that light wont turn off
     
    JakeFzr250, Dec 19, 2016
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  18. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Its definately a 3LN1 ?
     
    GreyImport, Dec 19, 2016
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  19. JakeFzr250

    JakeFzr250 Member

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    Yes def is
     
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    JakeFzr250, Dec 19, 2016
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  20. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Add another 100ml of oil
     
    GreyImport, Dec 19, 2016
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