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Thread: Tri Z with YZ motor

  1. 08-08-2003, 08:01 PM #1
    CHAINSAW's Avatar
    CHAINSAW
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    Tri Z with YZ motor

    I saw one on ebay not to long ago, but Im wondering if anyone else has tried it? I can get a Z complete with no motor for pretty cheap, and Im considering building one.
    My main question is, do the YZ 250s have a fuel pump like the tri does. How would that work with that motor.... (i.e. fuel pump with a 36mm Keihin carb) I dont think it would be a problem, but Ive never been around power valves and dont know if they suck fuel. Any and all help would be apprectiated.
    Oh, and the chassis I can get is an 85. So if you know what year YZ motor would slip right in, give me an idea.
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  2. 08-08-2003, 10:01 PM #2
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    250SX
    250SX is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    I think '85-7 is the one to get. If you get one & want to sell let me know. 8)
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  3. 08-08-2003, 10:21 PM #3
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    CHAINSAW
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    Thats what I was thinking to... I might have to find some YZs around here and compare before I get to serious about it.
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  4. 08-09-2003, 12:24 AM #4
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    Dynofox
    Dynofox is offline Roostin' Away Arm chair racerRoostin Away
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    A powervalve motor will use less fuel when the valve isn't open, when it does open it will be the same as a non valved motor. I've never had a dirt bike or trike with one but my sled has them and they helped the fuel mileage compared to the older non powervalve motor it replaced. But then again the bike motor you are looking at has a 36 mm carb were as the Z used a 34, so there goes your gas mileage!
    http://photos.yahoo.com/dynofox250 (TF 03 pic's)

    Trikes: Restored '86 ATC 250r, original and mint '83 185s

    Quad: '86 TRX 250r

    Sled: Rev X 800ho mod

    Bike: '00 ZRX 1100

    TF '03 and '05 Survivor
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  5. 08-09-2003, 01:24 PM #5
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    I cant decide which carb I should use. I have a stock 36mm keihin, and a 39mm PWK (on my R right now, but might take it off)
    Thanks for the info.
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  6. 08-10-2003, 09:34 PM #6
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    AirManCam
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    Make up your mind lol
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  7. 08-10-2003, 09:45 PM #7
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    smokinwrench
    smokinwrench is offline sled neck mechanic Got the holeshot
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    Hey airman you cant rush perfection and just throw a bunch of junk together.

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  8. 08-10-2003, 11:29 PM #8
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    AirManCam
    AirManCam is offline Teaching Quads A Lesson Arm chair racerRoostin Away
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    True dat smokin turd err um wrench. lol. I would go with the 39
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  9. 08-11-2003, 06:46 PM #9
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    CHAINSAW
    CHAINSAW is offline Power User Roostin Away
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    well my plans have changed again. this weekend it went from a YZ motor in a tri z, to a 500R, now its back to just getting my R running to perfection. Every deal I worked on fell through, so I have given up on relying on other people.. hehehe Besides, its only gonna take a grand to get my R running, so hopefully I will have it done in a couple of weeks.
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  10. 08-11-2003, 08:07 PM #10
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    AirManCam
    AirManCam is offline Teaching Quads A Lesson Arm chair racerRoostin Away
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    Oh that sucks. Only a grand he says. I wish I could have a grand and say hey its only a grand LOL
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  11. 08-11-2003, 08:59 PM #11
    CHAINSAW's Avatar
    CHAINSAW
    CHAINSAW is offline Power User Roostin Away
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    compared to how much money I have dumped into this piggy back I call a 250R, another grand doesnt really mean much. I used to cringe everytime I had to spend a hundred on it.. now, Im redoing most of those fast $100 dollar deals, and doing it right.
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  12. 08-11-2003, 09:20 PM #12
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    AirManCam
    AirManCam is offline Teaching Quads A Lesson Arm chair racerRoostin Away
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    Thats good to hear. Is it a 250r or a 500r? When you get it finished you should post some pictures!!! Has does anyone have a completed 500r?
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  13. 08-11-2003, 09:55 PM #13
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    CHAINSAW
    CHAINSAW is offline Power User Roostin Away
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    Just a 250R.. and there are pics around of it.. but they are never current.. lol It changes with the wind.
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  14. 08-12-2003, 04:15 PM #14
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    AirManCam
    AirManCam is offline Teaching Quads A Lesson Arm chair racerRoostin Away
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    Oh I see. I thought you said 500r. But never mind I just miss read
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  15. 08-12-2003, 06:25 PM #15
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    500r 8) sold it a while back.
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    My 500R

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