is it a 3ln-1 or a model above ?

Discussion in 'Yamaha 250cc In-Line 4's' started by Fergus1, Jan 18, 2010.

  1. Fergus1

    Fergus1 New Member

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    i have just brought a new 3ln motor from a wreckers but it has an oil filter on the sump, the bike is a 1990 3ln1 the previous engine didn't have a filter, it just had a bolt with a screw in it.
    Will this engine still fit into the frame ?
     
  2. dontz125

    dontz125 Active Member

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    You have acquired a 3LN-3 or newer engine; the 2KR and 3LN-1 series had the internal filters (in order to change which you have to remove yer frickin' exhaust...). There was a fellow about a year or so ago who successfully did a similar swap; I believe he had to massage his sidestand mount.

    Let us know!
     
  3. Fergus1

    Fergus1 New Member

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    well thats good, is there any one who knows if there is a difference in oil pressure or anything electronic that will be a problem?
     
  4. dontz125

    dontz125 Active Member

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    Oil pressure should be a non-issue, as that's internal to the engine itself. The later (-6+) engines were derated (limited in power to 40PS), so ignition timing might be slightly different. It might be worthwhile to swap your original cams into the new engine. Is there any way to identify the year of the donor bike?
     
  5. simidau

    simidau Well-Known Member

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    My Bike:
    CBR250RR
    I put one of the newer engines in my bike. There is an issue - the oil pressure light, it works in reverse, so if it's on you have oil pressure.
     
  6. simidau

    simidau Well-Known Member

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    My Bike:
    CBR250RR
    also should mention, it's bolts straight in - I had to change one plug I believe, fuel pump I think - just a different type of connector.
    mine is a race bike so I have no side stand, so I had no issues there.

    Cheers
     
  7. FZRSHREDDER

    FZRSHREDDER New Member

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    Good luck with the swap, I'm sure you can make it fit. What did you pay for your engine?
     
  8. Fergus1

    Fergus1 New Member

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    too much..

    How hard is it going to be for a fit?

    The carbs are basicly the only salvagable part from the old motor.
     
  9. rodeobob

    rodeobob New Member

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    Looking at the parts pictures it looks like the sumps are interchangeable between the motors. So you could have the early cartrige in sump or the screw on filter just by swapping the sump.


    Bob.
     
  10. Fergus1

    Fergus1 New Member

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    it was actually a motor from a zeal. just got it running today and bad news...
    looks like it will be going back to japan or where ever they got it from.
     
  11. rodeobob

    rodeobob New Member

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    Not running right????
     
  12. Fergus1

    Fergus1 New Member

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    understatement.. its not running right alright.. what a mess <!-- s:( --><img src="{SMILIES_PATH}/icon_sad.gif" alt=":(" title="Sad" /><!-- s:( -->
     
  13. FZRSHREDDER

    FZRSHREDDER New Member

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    Geez sorry to hear that mate, can you be more descriptive about how it is, maybe it is fixable.

    best of luck!
     
  14. Fergus1

    Fergus1 New Member

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    sure.. ill post in more detail maby tomoz. But it isnt fixable if it is its not worth doing it with this motor. even if it was fully done out new it would probs die before 1 year of running
     

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