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Linkin's FZR250 3LN6

Discussion in 'Your 250cc Projects' started by Linkin, Oct 26, 2014.

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  1. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    My Bike:
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    Got the engine in and started bike up. All sounds good. Have a coolant leak from one of the pipes onto the head to sort out though.

    Main issue now is that I cannot get the clutch to disengange. The cable is on but pulling the lever in is very light and doesn't fell like its doing anything. put it into first with the lever in and it stalled, so its definitely not disengaging. Need some advice on this as the new plates and springs went in the way they should have
     
    Linkin, Dec 19, 2015
    #281
  2. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Make sure the sidestand is up before u put it in gear
     
    GreyImport, Dec 19, 2015
    #282
  3. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Stand was up. Let me rephrase. All I can feel from the clutch lever is the spring tension of the spring on the cable. With the engine running, I put it into first while holding the lever in and it stalled.
     
    Linkin, Dec 19, 2015
    #283
  4. Lynxdragon

    Lynxdragon Well-Known Member

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    is the ball bearing on the end of the pushrod still?


    Sent from my iPhone using Tapatalk
     
    Lynxdragon, Dec 19, 2015
    #284
  5. Joker

    Joker See "about me" for contact details. Contributing Member

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    Are the fairings chinese ones?

    Also, any pics of your clutch rebuild?
     
    Joker, Dec 19, 2015
    #285
  6. jnz92

    jnz92 Active Member Premium Member Contributing Member

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    Pushrod straight? Ball bearing still on the end?

    Edit: Go for a leak and I'm beaten to the punch.
     
    jnz92, Dec 19, 2015
    #286
  7. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Did u operate the lever while looking at the plates working with the cover off?
     
    GreyImport, Dec 19, 2015
    #287
  8. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    I had the engine out when I replaced the clutch, cable was not attached.

    Made sure that the rod and ball bearing were in there and that I didn't lose them

    I think maybe where the clutch cable is attached to the engine was not in the right position while I was changing the plates.
     
    Linkin, Dec 19, 2015
    #288
  9. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Fixed it... looks like a difference between models again, as the original one of these from my engine broke and I grabbed a spare from the fizzer factory, didn't notice the difference in length. Left is 3LN6/7, right is whatever I grabbed from the spares box

    [​IMG]
     
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    Linkin, Dec 19, 2015
    #289
  10. kiffsta

    kiffsta Senior Member

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    Hey Linkin,

    Great job mate, I remember a few years back when you joined up here, you had a Kawasaki Ninja 250R that kept getting knocked over out the front of your unit in Sydney and were not all that confident at the mechanical side of things. Fast forward a few years with some experience gained from owning and fixing your FZR, advice from other members and some structured mechanical training, you are now stripping down and rebuilding FZR250 engines.

    Im super stoked for you, well done mate !!!

    And because of all this, you get the Play of the Day award !!

    Kiff

    play.jpg
     
    • Like Like x 8
    kiffsta, Dec 20, 2015
    #290
  11. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Thanks. I know enough to be dangerous :D

    Rode the bike early this morning to bed everything in. You can really hear the difference when the compression is high. The only way to explain is that the engine sounds tight. Definitely a sharper exhaust note.

    Anyway the speedo cable broke, due to mechanic putting the speedo drive in a bad spod with the cable facing down, putting stress on the cable.

    Just need a correct 3LN3+ screen, fix up the fuel tank, and give the bike a detail
     
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    Linkin, Dec 20, 2015
    #291
  12. WellyFZR

    WellyFZR Member

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    Sorry to be dredging through posts, may I ask how the bike went using chinese pistons etc? Currently rebuilding my motor and getting all genuine parts looks like its going to cost me an arm and a leg. Thinking about going chinese but I'm worried about the quality, longevity and precision of size.

    Any feedback is appreciated, cheers.
     
    WellyFZR, Dec 7, 2016
    #292
  13. Joker

    Joker See "about me" for contact details. Contributing Member

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    Chinese rings are ok, I bought from AHL (aliexpress) and they look good. Almost about to put my motor together. I believe others have had some success as well.
     
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    Joker, Dec 7, 2016
    #293
  14. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    Have used the rings with good results. Cannot say how long they will last, but probably longer than me. :lolsign:
     
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    Murdo, Dec 8, 2016
    #294
  15. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

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    Came across this thread whilst researching people's experiences with the conrod and crank bearings from aliexpress.

    I've got a partially disassembled 3LN1 engine which is going to get an overbore to 52mm, because OEM FZR piston rings are just too damned expensive and results vary with the chinese ones

    L.A. Sleeve - fl-52 from this page - https://www.lasleeve.com/tech/all-purpose-sleeves#panel2v

    This piston from Airsal which is for the YZF-r125 among other bikes - pin diameter 14mm compression height 18mm, this is a higher compression, aftermarket piston which should at least keep some of the original combustion chamber shape
    http://www.racingplanetusa.com/pist...sion-52mm-yamaha-p-167531-1.html#.WtwQsBdLfUI

    I've got other things in mind, but stock yzf-r125 piston coming to me first to check some things before splashing for the rest

    I'll start a thread when actual work commences
     
    ruckusman, Apr 22, 2018
    #295
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