Kdx 250 swapped blaster

Discussion in 'Engine Mods and Swaps' started by Kdxswap15, Jun 11, 2020.

  1. Kdxswap15

    Kdxswap15 New Member

    Joined:
    Jun 11, 2020
    Messages:
    8
    Likes Received:
    2
    Trophy Points:
    25
    I put a kdx 250 motor in a blaster

    6.5in stretch (I think)

    It runs next up is the cooling system Any ideas?

    Guy told me it’s an 2003 (I bought it as a roller with no motor)

    disc brakes front and rear

    no gussets and I’m only using 2 mount points which will probably change if it breaks
     
    Last edited: Jun 11, 2020
  2. Kdxswap15

    Kdxswap15 New Member

    Joined:
    Jun 11, 2020
    Messages:
    8
    Likes Received:
    2
    Trophy Points:
    25
    Here are some old photos
     

    Attached Files:

    Slydog likes this.
  3. Slydog

    Slydog Active Member Technician

    Joined:
    Nov 3, 2019
    Messages:
    1,460
    Likes Received:
    251
    Trophy Points:
    119
    Gender:
    Male
    Occupation:
    Diesel mech
    Location:
    Florida
    That should make for a fun trail bike. Been looking around for a kdx myself. The whole bike though. Are you going to hookup the head stay mount? Important on the dirtbikes so the frame don't crack. As for rads. People have done yz swaps. Don't remember what they did for mounting rads. Maybe do a search on here?
     
  4. Kdxswap15

    Kdxswap15 New Member

    Joined:
    Jun 11, 2020
    Messages:
    8
    Likes Received:
    2
    Trophy Points:
    25
    I’m going to use a Mojave radiator and what causes the frame to crack? Wouldn’t the only support the head mount is providing side to side movement?
     
  5. Slydog

    Slydog Active Member Technician

    Joined:
    Nov 3, 2019
    Messages:
    1,460
    Likes Received:
    251
    Trophy Points:
    119
    Gender:
    Male
    Occupation:
    Diesel mech
    Location:
    Florida
    That's on dirtbikes with steel frames. They use the motor to strengthen frame. They try and make everything as light as possible. The front down tubes break between front mount and steering steem.
     
  6. Kdxswap15

    Kdxswap15 New Member

    Joined:
    Jun 11, 2020
    Messages:
    8
    Likes Received:
    2
    Trophy Points:
    25
    71BCCEB0-93AA-4CD2-BFBB-0C0F0FE462F4.jpeg 3BFC2B3A-77F2-41E1-922A-74326C68F9FB.jpeg 7328A0DE-0692-40F0-8F41-C13B8D0851ED.jpeg Well I installed the new radiator and got running like a top and then the shifter scraped the ground and broke the case along with bending the shift shaft :/ I jb welded it for now until I decide what I want to do it still shifts and runs fine it just leaks ALOT so I’m not sure what I plan on doing now
     
  7. Slydog

    Slydog Active Member Technician

    Joined:
    Nov 3, 2019
    Messages:
    1,460
    Likes Received:
    251
    Trophy Points:
    119
    Gender:
    Male
    Occupation:
    Diesel mech
    Location:
    Florida
    How did it run with the kdx. Motor?
    That sucks about the case. Any on fleabay
     
  8. Kdxswap15

    Kdxswap15 New Member

    Joined:
    Jun 11, 2020
    Messages:
    8
    Likes Received:
    2
    Trophy Points:
    25
    It’s real nice and it’s got lots of low end torque vibrates quite a bit at high rpm though then again not everything is fully mounted this is also a kdx 250r motor cause it’s got the bigger carb so it’s got a lot of power i like it a lot and I found a few cases on eBay but there’s a motorcycle junkyard close to my house so I’ll probably try that first
     
    Slydog likes this.
  9. Slydog

    Slydog Active Member Technician

    Joined:
    Nov 3, 2019
    Messages:
    1,460
    Likes Received:
    251
    Trophy Points:
    119
    Gender:
    Male
    Occupation:
    Diesel mech
    Location:
    Florida
    Good luck. They don't seem to expensive? What year is it ?
     
  10. Kdxswap15

    Kdxswap15 New Member

    Joined:
    Jun 11, 2020
    Messages:
    8
    Likes Received:
    2
    Trophy Points:
    25
    Just the left
    Case seems to be around $70 I’m not positive but I’m pretty sure the motor is a 1993 and the frame is an 2003
     
  11. Slydog

    Slydog Active Member Technician

    Joined:
    Nov 3, 2019
    Messages:
    1,460
    Likes Received:
    251
    Trophy Points:
    119
    Gender:
    Male
    Occupation:
    Diesel mech
    Location:
    Florida
    That's pretty cheap. Ussualy left cases break more often due to chains breaking and are more expensive. At that price you might want to make sure there's no repairs made on case. Or damage. Around crank area
     
    Kdxswap15 likes this.
  12. Kdxswap15

    Kdxswap15 New Member

    Joined:
    Jun 11, 2020
    Messages:
    8
    Likes Received:
    2
    Trophy Points:
    25
    So enough sitting and procrastinating I took off all the jb weld Took out the shift shaft and straightened it the best I could with the help of a hydraulic press cleaned everything with a wire wheel and I ground down the two broken off pieces so they sit nice and flush to the shift shaft,


    Now do I aluminum braze it? Or use some type of aluminum epoxy? Has anyone had experience with repairing a case like this?
     

    Attached Files:

  13. Slydog

    Slydog Active Member Technician

    Joined:
    Nov 3, 2019
    Messages:
    1,460
    Likes Received:
    251
    Trophy Points:
    119
    Gender:
    Male
    Occupation:
    Diesel mech
    Location:
    Florida
    Best bet would be to get ot welded
    Maybe do alittle let it cool acouple minutes and do alittle more as to not get it too hot.
    So you don't have to split case's?
     

Share This Page