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Thread: another tri z project

  1. #1
    pcs's Avatar
    pcs is offline Just Too Addicted Arm chair racerJust too addicted
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    another tri z project

    in the search of MO POWAH. i decided to go with a yz250, work the bugs out, then go with a esr 325 kit. unfortunately since im working about 3 hrs away from home. i cant work at the pace it would like. here are pics of the donor. Issues i can already see is no lights, exh exits on the other side, kickstarter direction, and carb boot is angled. im going to weigh the engines and get some side by side pics. more to come.
    Attached Thumbnails Attached Thumbnails A5E2FF7E-1600-41F5-BC48-AB4397A8AF42.jpg   image.jpg   4AC075A0-ADFD-4863-837E-DA7D7C445DAA.jpg  
    Team Blue: 85 Tri-z 250: under the knife
    Team Red: 87 Trx250r 01Cr80 15 CBR600RR
    Team Yellow: 06 Ltr450 11 Hayabusa

  2. #2
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    The tecate kid did a very similar project a few years back, but he never posted with a ride report on the power, as he was working out some suspension issues.

    http://www.3wheelerworld.com/showthr...-new-Tri-Z-250
    Red Rider's Sand Machine Updated 07/23/14

  3. #3
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    Awesome build! Looking forward to following your progress.
    It sucks to get old

  4. #4
    pcs's Avatar
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    thx for the link, im thinking of getting some seat time with the oem cylinder before going to b.b. esr 325 bb their reeds and pipe. also a straight carb boot.
    Team Blue: 85 Tri-z 250: under the knife
    Team Red: 87 Trx250r 01Cr80 15 CBR600RR
    Team Yellow: 06 Ltr450 11 Hayabusa

  5. #5
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    You're welcome. Looking forward to the progress reports.
    Red Rider's Sand Machine Updated 07/23/14

  6. #6
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    Should be an interesting build. Does the YZ250 engine have no lighting coil in the engine? Do you have a service manual for the bike, if so I'd love a digital copy. If it does have a lighting coil, it should be 1, 2, or 3 wire, 1 and 2 should be 1 phase (normal AC), and 3 wire should be 3 phase. I'd assume if it has a lighting coil it will be single phase though. I don't have the tri-z manual in front of me, but pretty sure it's also single phase.

    I might be able to help with a custom harness on this project assuming you're mounting electrical parts in the Tri-Z stock locations. If you're not interested that's ok too, I'll try to help with what I can, just don't think I have the YZ manual. Talking about the YZ, what year is it?

    Sadly, I don't really know the Yamaha engines so well, so can't really help with ideas for parts like the intake issue. I suspect the kick start problem will be a bit of a challenge, you think it will clear the rear wheel? Might just have to remove the rear fenders to start it. Maybe it would be possible to push start it lol.

    Good luck with the build though

  7. #7
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    And now the tecate kid's Tri-Z is for sale: http://www.3wheelerworld.com/showthr...Z-250-for-sale
    Red Rider's Sand Machine Updated 07/23/14

  8. #8
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    Thats gonna vibrate a good bit up front at bars with that YZ motor

  9. #9
    pcs's Avatar
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    got both motors out, going to get some weights when i get a chance
    Attached Thumbnails Attached Thumbnails D7D9F333-E244-4075-B39E-24F12F9EF60F.jpeg   DD0B88F4-F323-4290-ADD7-E25AB8A6B3EB.jpg  
    Team Blue: 85 Tri-z 250: under the knife
    Team Red: 87 Trx250r 01Cr80 15 CBR600RR
    Team Yellow: 06 Ltr450 11 Hayabusa

  10. #10
    pcs's Avatar
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    tri has no kicker on, has carbon reeds, and a cool head. yz has factory steel reeds, head, and kicker and no lighting coil.
    Attached Thumbnails Attached Thumbnails D003F40A-AC4E-4208-A89C-AE2DC3001F00.jpg   3F938EF9-EDB9-42CD-86B7-1F22D13E0E91.jpeg  
    Team Blue: 85 Tri-z 250: under the knife
    Team Red: 87 Trx250r 01Cr80 15 CBR600RR
    Team Yellow: 06 Ltr450 11 Hayabusa

  11. #11
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    Can't wait to see this project

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  12. #12
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    Out of curiosity....why change the power plant?
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  13. #13
    pcs's Avatar
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    o
    Quote Originally Posted by yaegerb View Post
    Out of curiosity....why change the power plant?
    more hp in stock form, will switch to an esr big bore and yz250x wide ratio tranny
    Team Blue: 85 Tri-z 250: under the knife
    Team Red: 87 Trx250r 01Cr80 15 CBR600RR
    Team Yellow: 06 Ltr450 11 Hayabusa

  14. #14
    pcs's Avatar
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    some measurements pics
    Attached Thumbnails Attached Thumbnails 7723D397-8E92-49E6-8425-36F69D53FA68.jpg   F4BBAE9A-6D7C-4E02-88BB-95A70013D836.jpg  
    Team Blue: 85 Tri-z 250: under the knife
    Team Red: 87 Trx250r 01Cr80 15 CBR600RR
    Team Yellow: 06 Ltr450 11 Hayabusa

  15. #15
    pcs's Avatar
    pcs is offline Just Too Addicted Arm chair racerJust too addicted
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    more pics of yz250
    Attached Thumbnails Attached Thumbnails C4855ABB-7602-44A4-905C-A2C6E04673F0.jpeg   4B745474-9CFE-40CF-8696-69CD9BFA4AB0.jpg  
    Team Blue: 85 Tri-z 250: under the knife
    Team Red: 87 Trx250r 01Cr80 15 CBR600RR
    Team Yellow: 06 Ltr450 11 Hayabusa

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