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NSR 250 Dry clutch engine ID

Discussion in 'Honda 250cc 2 Strokes' started by noah, Oct 19, 2013.

  1. noah

    noah Active Member

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    ok picked up a dry clutch engine but i have no idea which model its from

    anyone got any ideas on how to identify please
     
  2. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Id assume the engine number would match the frame number.

    Open up the parts manuals and it has the frame numbers for most models.

    http://workshop.nsr-world.com/
     
  3. noah

    noah Active Member

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    sorry mate

    engine is on its own

    i read once about the position of the oil switch or neural switch or something like that but i cant seam to find that anymore
     
  4. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    But the engine will have a number stamped on it which u can match to the frame numbers I linked (click on the parts manual then model years on the left)
     
  5. noah

    noah Active Member

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    sorry man bit retated

    how do i cross reference the engine number to the frame number as i cant see the numbers sorry
     
  6. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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  7. Fox McScrooge

    Fox McScrooge Well-Known Member Premium Member Contributing Member

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    Hi Noah,

    If it's a dry clutch engine it will most likely be from either an SE or SP MC21 or MC28. That said, many R model MC21 or MC28 engines have been switched from wet clutch to dry clutch. There are some other differences; MC21 and MC28 engines have different barrels and things like the gear position sensor and speedo pickup are different. If you search NSR World you will find the information you are looking for.

    Cheers
    Jim
     
  8. noah

    noah Active Member

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    thanks guys

    the engine no is 1140494

    it is a dry clutch factory

    if you could help with the chart provided above that would be great as i cant
     
  9. Fox McScrooge

    Fox McScrooge Well-Known Member Premium Member Contributing Member

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    Noah,

    U unless I'm mistaken, I think you will find it very difficult to determine the model of NSR from the engine number alone. Normally models are identified based on their frame number, engine type and the model / colour codes listed on a sticker on the rear subframe (assuming that wasn't replaced after a stack). Obviously you don't have much of that so your only option is to have a look at what is stamped on the barrels and for the small changes between engine types that I mentioned above. For instance, barrels are not interchangeable between MC21 and MC28 engines as far as I am aware. It's not an easy process but you will find that by searching the NSR World forum you will be able to work it out.

    Cheers
    Jim
     
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  10. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Thanks for that Jim .... I know nothing about NSRs and was just using the assumption that the frame and engine number would match (out of the factory) as with other bikes .

    :thumb_ups:
     
  11. noah

    noah Active Member

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    bloody honda

    why do they have to be so difficult

    trouble is i need to rebuild the crank but looks like be cheaper to buy a running bike
     
  12. Fox McScrooge

    Fox McScrooge Well-Known Member Premium Member Contributing Member

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    You can get a brand new Honda crank from Tyga. They include all the seals and gaskets required. It may be a bit exxy but the engine will be good for 30k or so.
     
  13. noah

    noah Active Member

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    thanks for all the input

    it looks like a strip down to determine as there looks like lots of variants on this engine
     
  14. Neal

    Neal Active Member

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    Hey Noah ,

    What did you end up doing with the motor ?

    Cheers ,,Neal
     
  15. Neal

    Neal Active Member

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    Let me know if you want to sell it .
     
  16. noah

    noah Active Member

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    needs a crank rebuild

    what would be offering for a dry clutch engine
     
  17. Fox McScrooge

    Fox McScrooge Well-Known Member Premium Member Contributing Member

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    What are the barrels like?
     
  18. Neal

    Neal Active Member

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    Reimburse your money ? I am NOR and can meet up anytime to discuss
     
  19. noah

    noah Active Member

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    thanks for the interest but its not for sale
     

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