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Thread: Kx250 motor into a tecate 3

  1. #1
    Join Date
    Apr 2011
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    Australia
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    131

    Kx250 motor into a tecate 3

    Has anyobe here successfully fitted a late model kx250 motor into a tecate 3? Either 85 or the newer 86. Got an 86 atc250r frame i wanted to put a cr motor in but the whole forward kickstart thing, hence lookibg at the tecate idea

  2. #2
    Join Date
    Mar 2010
    Location
    Arizona
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    795
    I know Tecates shared the same engine as the KX 250s back in the day, but if you're talking about more recent KX's I can't say. I haven't seen it done. I know people have put modern YZ engines in the Tri-Z. I would think the KX engine could be done, it just depends how much fabrication you're willing to do.

  3. #3
    Join Date
    Oct 2003
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    Las Vegas, NV.
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    Someone on these boards swapped a newer KDX engine into an '85 Tecate a few years back, if I'm not mistaken.
    Red Rider's Sand Machine Updated 07/23/14

  4. #4
    Join Date
    Apr 2011
    Location
    Australia
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    Yeah im looking into doing a 99+ kx motor into an 85 tecate. So far the biggest hurdle seems to be the down tube on the frame will be right in front of the exhaust port? Will obviously need to fab in a Y piece.

  5. #5
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  6. #6
    Join Date
    Apr 2019
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    Greece
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    Hello vroomy, alexandros here in Greece did it many years ago but with an 86 tecate frame. So it can be done but your biggest issue is as you said the cradle at the 85 frame will be in the middle of your exhaust so you will have to make it U like the 86.

    http://www.3wheelerworld.com/showthr...ght=Alexandros
    Last edited by Antreas Sp; 12-02-2019 at 04:30 AM.

  7. #7
    Join Date
    Nov 2019
    Location
    Florida
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    31
    I don't know jack about a tecate (other than they look awesome) I did own a KX250, and all I tell you is they run like a bat outta hell, I miss that bike for sure.
    Good luck, nothing a welder and a die grinder cant fix.

    MrC.

  8. #8
    Join Date
    Jul 2005
    Location
    Manheim PA 17545
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    No dirtbike motors had counter balancers but 4 strokes. With out it your gonna vibrate your hands bad. It will turn into a conversational item for your she shed vs a machine your gonna go ride 6 hours on sunday. This is my only warning.

    Just build an 85 tecate motor or blow in a 4 stroke. You will have somthing you can enjoy more then looking at it.
    2002 Blaster
    1983 tri moto 200
    2015 Rancher 420 dct eps irs

  9. #9
    Join Date
    Apr 2011
    Location
    Australia
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    Im pretty sure none of the tecate motors had counter balancers anyway, so shouldn't be any different?

  10. #10
    Join Date
    Apr 2011
    Location
    Australia
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    I know i had tighten evey bolt after a day of riding on my 87, thats if they didnt already fall out lol

  11. #11
    Join Date
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    if thats your idea of fun then go for it. I'd rather see a LT250r motor in one. Its been done a few times. If your a yard rider then it wont matter.
    2002 Blaster
    1983 tri moto 200
    2015 Rancher 420 dct eps irs

  12. #12
    Join Date
    Oct 2003
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    Las Vegas, NV.
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    Quote Originally Posted by vroomy View Post
    Im pretty sure none of the tecate motors had counter balancers anyway, so shouldn't be any different?
    Exactly! Only the Tecate 4 motor's had a counter-balancer.
    Red Rider's Sand Machine Updated 07/23/14

  13. #13
    Join Date
    Apr 2011
    Location
    Australia
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    "Yard rider" haha. Why would i want more power if i was a yard rider? If thats where i was going to ride i would stick an lt250 motor in because they are so tame

  14. #14
    fabiodriven's Avatar
    fabiodriven is offline Aspiring romance novel cover model, and the Official 3WW slayer of thieves and swindlers. Catch me if you can
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    Quote Originally Posted by oldskool83 View Post
    No dirtbike motors had counter balancers but 4 strokes. With out it your gonna vibrate your hands bad. It will turn into a conversational item for your she shed vs a machine your gonna go ride 6 hours on sunday. This is my only warning.

    Just build an 85 tecate motor or blow in a 4 stroke. You will have somthing you can enjoy more then looking at it.
    Some things never change! Old Stool fails again! The Tecates didn't have a counter balance brand new from the factory!
    85 Tri-Zinger 60
    85 ATC250SX
    86 ATC250SX
    87 ATC250SX
    02 XR650L conversion
    84 ATC 480R

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