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FZR250 3LN1 TRACK BIKE

Discussion in 'Your 250cc Projects' started by GenericForumName, Feb 10, 2015.

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  1. GenericForumName

    GenericForumName Active Member

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    @Linkin ...

    [​IMG]
    [​IMG]
    [​IMG]

    Dodgy as f#$k but tis racebike so haven't really bothered making it pretty.
     
    GenericForumName, Aug 23, 2015
    #41
  2. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    I'll send you a PM
     
    Linkin, Aug 23, 2015
    #42
  3. Mclaren

    Mclaren Well-Known Member Contributing Member

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    Remove paper and tape it u wanted weight hahaha
     
    Mclaren, Aug 23, 2015
    #43
  4. GenericForumName

    GenericForumName Active Member

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    GenericForumName, Aug 25, 2015
    #44
  5. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Ask the seller for the measurements/dimensions and I'll check against one of the many spare fuel tanks at the fizzer factory
     
    Linkin, Aug 25, 2015
    #45
  6. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    *Kawasaki ZXR250C *Yamaha FZR250R 3LN1 *Yamaha FZR400 *Triumph Bonneville 750 T140V *Triumph Daytona 675 *Triumph Tiger 800XC
    GreyImport, Aug 25, 2015
    #46
  7. GenericForumName

    GenericForumName Active Member

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    Just looked up the part number and the FZR1000 shares the same as the 3LN6\7 but th 1/3/5 use a different part. I wonder what the difference would be?
     
    GenericForumName, Aug 25, 2015
    #47
  8. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    I doubt there would be any size difference as far as fitting an aftermarket cap is concerned.
     
    Linkin, Aug 25, 2015
    #48
  9. Th3_Huntsman

    Th3_Huntsman Senior Member Contributing Member

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    Maybe the newer one superceds the older part number?
     
    Th3_Huntsman, Aug 25, 2015
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  10. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    I have a new Chinese after market locking cap ... and as Linkin says , we have like tanks everywhere here .... 1,3,6

    Ill try it out and check the hole position.
     
    • Like Like x 1
    GreyImport, Aug 25, 2015
    #50
  11. GenericForumName

    GenericForumName Active Member

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    Ended up ordering a FZR1000 one, should be fine.....

    All this talk of dashes and pulling mine out encouraged me to actually to a good job of the wiring rather than just bundling it all up and wrapping it in tape (see above lol) didn't take a photo of the end result but the dash now only has 5 wires going to it. This is what I removed from just the dash loom....

    [​IMG]


    The mind boggles to how much more I could remove from the rest of the bike. That'll be a fun weekend tear down.

    @Linkin, that's your tacho, don't worry I haven't thrown it out ;)

    Also this is a taco. Amazing what a difference a single letter can make.
    [​IMG]
     
    • Like Like x 7
    GenericForumName, Aug 30, 2015
    #51
  12. GenericForumName

    GenericForumName Active Member

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    Hey all,

    So I had a very interesting weekend at the Baskerville Historics on the weekend...Big end bearing let go.

    (Taken from my facebook page)
    What an epic two days it's been! Yesterday during free practice I got 2 laps in practice before my engine blew up meaning potentially I wouldn't be able to make the race! Luckily the folk at B-Spoke Design happened to have a bike with a working engine that I could use....at the other end of the state.

    380k's and 4 and 1/2 hours later, I had procured a spare bike and gathered the troops to assist in swapping the engine from one bike to the other.

    I stopped looking at the clock at 2am but the engine was in the bike and it was again race ready...

    Today after somewhere between 2-4 hours of sleep, I was back at the track ready and eager to see how the relativily untested bike would perform.

    Qualifying: Tyres were still unscrubbed and I had to push straight out of the box. The bike felt OK but was lacking to what I was used to, corner speed was fine but it just wasn't producing power. Turns out in the frantic swap over, the new spark plugs weren't torqued and were only finger tight. A dissapointing 73 second lap put me 15th of 24 on the grid.

    Race 1: Plugs tightened, bike checked and tyres now scrubbed in I was ready to push. Got a great start and made 3 places straight off the line, was eyeing Larry off into turn one and was contimplating a late braking move until Cary, swooped in and blocked me. Took me until Calvins to get past Cary, and I finally got past Larry about half a lap later. After that I was eyeing off Ian, and was slowly making time, but with only 5 laps, I just couldn't catch him in time.

    From 15th to 8th, pretty happy with that result all things considered. It was an awesome day racing and the best part is I get to do it all over again tomorrow....after some sleep.zzzz

    Thanks heaps, Lincon, Phil & Sean coudn't have got the bike together without you guys. Big thanks to Horizon Motorcycles for the quick respose when the call out came for parts for the new engine. Thanks again to B-Spoke Design wouldn't have been racing today without your help.


    (Post from the next day.)
    Wow, what a great day! Of the three races today, from 15th on the grid, I managed to get two 8th places and would have snagged a 6th but was a little naughty and got caught overtaking under yellows so had a 10 sec penalty applied putting me back to 11th. Thanks to Horizon Motorcycles for their consistent support and all who were envolved with helping me out this weekend, it is soo appreciated and I'm soo thankful to have you guys in my life.

    12112452_525485927609613_5995348820472136125_n.jpg
     
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    GenericForumName, Oct 6, 2015
    #52
  13. GenericForumName

    GenericForumName Active Member

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    So this engine that I picked up was a bit of a weird one, it seems to have a 2KR bottom end and a 3LN head. I didn't realise that they were interchangeable.

    Next step for me for me will be looking at doing a full rebuild of this f&$ked engine. I've never done a bottom end before so any tips tricks advice would be extremely appreciated. Stay tuned and I'll try to post up as much as I possibly can.
     
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    GenericForumName, Oct 6, 2015
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  14. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Do you know what broke on your original engine?
     
    Linkin, Oct 6, 2015
    #54
  15. GenericForumName

    GenericForumName Active Member

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    Speculation at this stage, but I'd bet my house on a big end bearing, I've heard that rattle before.
     
    GenericForumName, Oct 6, 2015
    #55
  16. Moo

    Moo Plodge Racing!!!

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    mate top effort!! well bloody done!
     
    Moo, Oct 6, 2015
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  17. GenericForumName

    GenericForumName Active Member

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    Does anyone know if the sump from a 3LN1 will fit on a 2KR?
     
    GenericForumName, Nov 3, 2015
    #57
  18. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    The 3LN1 part number is 3HX-13417-01. 3HX is a 2KR with the EXUP valve fitted. You may be able to put a 3LN1 sump onto a 2KR with EXUP. Unsure for the earlier year model bikes (2KR & 2RF).

    The 3LN1, 3LN3/5 and 3LN6/7 all have a different part number for the sump.

    The sump gasket is another matter entirely, it's been discontinued and you can't get new ones... have to find new old stock or reuse it.
     
    Linkin, Nov 3, 2015
    #58
  19. maelstrom

    maelstrom LiteTek Staff Member Premium Member 250cc Vendor Contributing Member

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    I have no idea if this is relevant to the 250. I own a 400 and I have not yet taken the time to examine my own engine. However, product knowledge counts for a lot.

    "If you measure csa(cross sectional area) of oil loss at rod ie:area of pin minus area of rod inc shells, times 2 for both sides . Plus oil loss for outer main brg(since these are fed together). This is the total area for oil loss assuming the crank is not moving(no centrifugal pull). A rule of thumb is that the supply csa is at least a third larger than the loss csa. This also assumes no 90 degree bends etc. If you look at the oil feed in the btm case it has an arduous path to the outer main and consequently the big end. The oil rises in a 5mm drilling (where the restrictor jets are) and then horizontally in a 6mm hole and then up again at 6mm to the outer big end. The 5mm drilling has to be because they wanted to put a M6 thread in it for the jet. Anyway, take the 5mm hole out to 6mm and then use a thread repair, Time sert or Helicoil, to restore the thread for the oil jet. The reason the main is OK is because it always has sufficient oil and little centrifugal force, however the big end throws the oil away at a considerable rate .Remove more than you are putting in and bang! I have seen hundreds of FZR's with outer b.ends gone. All modified as above sorted them out without fail. "
    from http://www.bdkraceeng.co.uk/Bike1.html

    cheers
    Blair
     
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    maelstrom, Nov 4, 2015
    #59
  20. Revolver

    Revolver Big Member Premium Member

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    I am interested in the shock story. Mine needs replacing soon. Is it an R6 one?
     
    Revolver, Nov 18, 2015
    #60
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