Kdx 250 swapped blaster

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

  1. Kdxswap15

    Kdxswap15 New Member

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    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

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    Here are some old photos
     

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  3. Slydog

    Slydog Member Technician

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    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

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    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 Member Technician

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    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

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    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 Member Technician

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    How did it run with the kdx. Motor?
    That sucks about the case. Any on fleabay
     
  8. Kdxswap15

    Kdxswap15 New Member

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    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
     
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  9. Slydog

    Slydog Member Technician

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    Good luck. They don't seem to expensive? What year is it ?
     
  10. Kdxswap15

    Kdxswap15 New Member

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    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 Member Technician

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    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
     
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