/ Register

  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

C/A crank swap hinderences

Discussion in 'Kawasaki 250cc In-line 4's' started by Bryn duFresne-Mann, Apr 14, 2016.

  1. Bryn duFresne-Mann

    Bryn duFresne-Mann Active Member Premium Member

    Messages:
    49
    Likes Received:
    34
    Trophy Points:
    188
    Joined:
    Nov 30, 2013
    Gender:
    Male
    Location:
    Wellington, New Zealand
    My Bike:
    Kawasaki ZXR250A1
    Hi guys, I may not have posted before, but I'm an avid zxr lover at 21 with 6 under my belt so far.
    Unfortunately my last bike was stolen about 2 months ago so I've started a ground up build- doing everything I know I want to do.

    A centre point for this build will be the engine, with an a model crank transplanted into a c. A recent discovery of an a model engine at dirt price has hurried up my planning schedule and I haven't yet done the math on whether the throws, counter weights and bearings will fit. And with only a c workshop manual I can't easily find specs.

    If anyone has a wealth of knowledge I would love to hear from you.

    Cheers,
    Bryn, New Zealand
     
    • Like Like x 1
    Bryn duFresne-Mann, Apr 14, 2016
    #1
  2. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

    Messages:
    4,737
    Likes Received:
    2,883
    Trophy Points:
    943
    Joined:
    Mar 18, 2014
    Location:
    Sydney NSW
    My Bike:
    FZR250R 3LN6
    Sounds interesting. If the bearing journals are the same size you will be in luck, but will still need to measure clearances to make sure they are within spec.
     
    Linkin, Apr 14, 2016
    #2
  3. Bryn duFresne-Mann

    Bryn duFresne-Mann Active Member Premium Member

    Messages:
    49
    Likes Received:
    34
    Trophy Points:
    188
    Joined:
    Nov 30, 2013
    Gender:
    Male
    Location:
    Wellington, New Zealand
    My Bike:
    Kawasaki ZXR250A1
    Im hoping someone has access to a loose crank or has the spec sheet of an A model workshop manual (are they a rare sight around? Or is it just me) so that I can compare to the c manual and loose cranks i have. Also knowing the absolute circumference of the crank throws and counters would be nice.

    Cheers,

    Bryn
     
    Bryn duFresne-Mann, Apr 15, 2016
    #3
  4. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

    Messages:
    10,929
    Likes Received:
    6,720
    Trophy Points:
    1,168
    Joined:
    Jun 14, 2012
    Gender:
    Male
    Occupation:
    Between a Rock and a Hard Place
    Location:
    North by NW NSW Oztralia - Tamworth
    My Bike:
    *Kawasaki ZXR250C *Yamaha FZR250R 3LN1 *Yamaha FZR400 *Triumph Bonneville 750 T140V *Triumph Daytona 675 *Triumph Tiger 800XC
    • Like Like x 1
    GreyImport, Apr 15, 2016
    #4
  5. Bryn duFresne-Mann

    Bryn duFresne-Mann Active Member Premium Member

    Messages:
    49
    Likes Received:
    34
    Trophy Points:
    188
    Joined:
    Nov 30, 2013
    Gender:
    Male
    Location:
    Wellington, New Zealand
    My Bike:
    Kawasaki ZXR250A1
    Damn, ive got the hard copy of that workshop manual. I suppose id best just buy this engine without even a theory check. After all theres nothing a mill and cross drill wont fix!

    Besides, one can never have too many parts, one can only hsve too small a cupboard!
     
    • Like Like x 1
    Bryn duFresne-Mann, Apr 16, 2016
    #5
  6. kiffsta

    kiffsta Senior Member

    Messages:
    9,066
    Likes Received:
    6,872
    Trophy Points:
    1,168
    Joined:
    Aug 7, 2010
    Gender:
    Male
    Location:
    Brisbane
    check the parts fiche for both models and compare part numbers , I know the bore and stroke are different between a and c models maybe the cranks are the same.
     
    kiffsta, Apr 16, 2016
    #6
  7. Bryn duFresne-Mann

    Bryn duFresne-Mann Active Member Premium Member

    Messages:
    49
    Likes Received:
    34
    Trophy Points:
    188
    Joined:
    Nov 30, 2013
    Gender:
    Male
    Location:
    Wellington, New Zealand
    My Bike:
    Kawasaki ZXR250A1
    The strokes are different, keeping meticulously to the .249l. Im just not sure of the overall dimension of the casting and mains
     
    Bryn duFresne-Mann, Apr 16, 2016
    #7
  8. Mad_Ryan

    Mad_Ryan Active Member

    Messages:
    42
    Likes Received:
    42
    Trophy Points:
    188
    Joined:
    Aug 30, 2016
    Location:
    AU
    My Bike:
    ZXR250A
    I have an A Model manual if you need info...its in japanese but o have an in house translator if you still need info....hate to revive an old thread but it might help if your still sitting on the idea....cheers.

    Sent from my SM-G925I using Tapatalk
     
    Mad_Ryan, Oct 8, 2016
    #8
  9. Bryn duFresne-Mann

    Bryn duFresne-Mann Active Member Premium Member

    Messages:
    49
    Likes Received:
    34
    Trophy Points:
    188
    Joined:
    Nov 30, 2013
    Gender:
    Male
    Location:
    Wellington, New Zealand
    My Bike:
    Kawasaki ZXR250A1
    That would be great Mad. I did buy the motor in the end, unfortunately, it had run a big end and chewed out the journal :( so I now know that the crank fits, with little massaging.. but need a new crank... Wink wink anyone? But I'm sure I'll have a few more questions before this is out!
     
    Bryn duFresne-Mann, Oct 10, 2016
    #9
  10. ruckusman

    ruckusman White Mans Magic Master Premium Member Dirty Wheel Club

    Messages:
    3,251
    Likes Received:
    1,427
    Trophy Points:
    918
    Joined:
    Oct 1, 2013
    Gender:
    Male
    Location:
    Narrabeen, NSW Australia
    My Bike:
    Yamaha FZR250 3LN1
    ruckusman, Oct 10, 2016
    #10
  11. Mad_Ryan

    Mad_Ryan Active Member

    Messages:
    42
    Likes Received:
    42
    Trophy Points:
    188
    Joined:
    Aug 30, 2016
    Location:
    AU
    My Bike:
    ZXR250A
    Theres a motor for sale in Perth for $500 it has about 40k o the clock if i recall...was a runner till the guy had a frontal crash at low speed

    Sent from my SM-G925I using Tapatalk
     
    Mad_Ryan, Oct 10, 2016
    #11

Share This Page