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Thread: Tri z 250 upgrades

  1. 06-18-2014, 10:04 PM #31
    honda3's Avatar
    honda3
    honda3 is offline At The Back Of The Pack Arm chair racerFirst time rider
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    Click image for larger version.  Name: image.jpg  Views: 52  Size: 970.8 KB  ID: 196093 this is my 83 with about 1400 into it, this one is in the process of having the tank fixed and the motor painted as well
    My 3 Wheelers

    1986 atc 200x(garage queen)
    1985 Honda 250sx
    1985 Honda Big Red
    1985 honda atc 70 breast cancer build
    1985 yamaha tri-z 250
    1985 Yamaha yt 60
    1985 yamaha yt 60
    1984 Honda Atc 70:
    1984 Honda atc 70
    1984 Yamaha Yt 60
    1983 Suzuki alt 50
    1983 atc 200x
    1983 atc 185s
    1982 yamaha yt175
    1982 atc 200e rider
    1980 honda 185(all original)
    1978 Honda atc 90
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  2. 06-18-2014, 10:19 PM #32
    El Camexican's Avatar
    El Camexican
    El Camexican is offline Power User Catch me if you can
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    Quote Originally Posted by this old rz View Post
    I'm not 100% sure either on the transmission changes from 85 to 86..I was just told that info. It will give us something to do ,find the printed ration on the 5 speed vs the 6 sp.
    It looks on the fiche like 1st is the same and so is 5th, but 6th is the difference. http://www.partsfish.com/oemparts/a/...4/transmission
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  3. 06-18-2014, 11:20 PM #33
    badass350x's Avatar
    badass350x
    badass350x is offline Power User Roostin Away
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    Very nice looking trikes!


    http://www.3wheelerworld.com/showthr...for-badass350x
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  4. 06-18-2014, 11:49 PM #34
    this old rz's Avatar
    this old rz
    this old rz is offline First Time Rider Arm chair racerNew to the board
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    Quote Originally Posted by El Camexican View Post
    It looks on the fiche like 1st is the same and so is 5th, but 6th is the difference. http://www.partsfish.com/oemparts/a/...4/transmission
    Thanks! good to know. I'm guessing the xtra top end is obviously the 6th gear, I just remembered reading the Yamaha sales advertisement for 1986 stating the 86 had a different ignition that advanced/retarded the timing automatically to optimize the power delivery so perhaps that's where the xtra grunt comes from. Wonder if there was any cylinder design changes as well? The 1986 Tri Zs seem too be really few and far between. I've viewed one for sale in the last year ,but probably at least 25 1985s. The 86 was also asking $3500.00 bucks as well
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  5. 06-19-2014, 06:35 PM #35
    honda3's Avatar
    honda3
    honda3 is offline At The Back Of The Pack Arm chair racerFirst time rider
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    That's cheap cheap
    My 3 Wheelers

    1986 atc 200x(garage queen)
    1985 Honda 250sx
    1985 Honda Big Red
    1985 honda atc 70 breast cancer build
    1985 yamaha tri-z 250
    1985 Yamaha yt 60
    1985 yamaha yt 60
    1984 Honda Atc 70:
    1984 Honda atc 70
    1984 Yamaha Yt 60
    1983 Suzuki alt 50
    1983 atc 200x
    1983 atc 185s
    1982 yamaha yt175
    1982 atc 200e rider
    1980 honda 185(all original)
    1978 Honda atc 90
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  6. 09-09-2018, 03:53 PM #36
    3Z with Fangs!
    3Z with Fangs! is offline At The Back Of The Pack Arm chair racerFirst time rider
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    Quote Originally Posted by badass350x View Post
    yup Rise the exhaust port 2mm's,, extra boost port, window the piston, 38mm airstriker,,This is Halls work and it runs and runs waaayyy fast!


    Attachment 196043Attachment 196044Attachment 196045
    When windowing the Piston, what measurements? How exactly do you know where to put the window? Yes I know, old thread but I'm not going to get a beat down for starting a new thread.
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