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Thread: Tri z vs yz transmission

  1. #1
    Join Date
    Jan 2014
    Location
    Prescott az
    --
    685

    Tri z vs yz transmission

    Finally got around to comparing the 5 speeds.

    85 tri z
    1st gear 2.38
    2nd gear 1.75
    3rd gear 1.41
    4th gear 1.14
    5th gear 0.95

    86 yz
    1st gear 2.14
    2nd gear 1.75
    3rd gear 1.36
    4th gear 1.14
    5th gear 0.95

    So my z is an 86 but has the 5 speed was hoping 5th gear in the yz was taller to give me more top end but it doesn’t. The z 1st gear is pretty low was debating on swapping it needed some opinions. Might change 3rd too.
    [/SIGPIC]
    85 350x
    83 200x-sold
    ×2 85 200x-sold
    06 kx250f-sold
    86 tecate-sold
    86 tri z powervalved
    85 BIG red
    18 rmz250
    87 lt80
    19 ttr110

  2. #2
    Join Date
    Apr 2011
    Location
    Mexico
    --
    9,003
    Are the YZ and Tri-Z transmission shaft part #’s the same?
    It sucks to get old

  3. #3
    Join Date
    Jan 2014
    Location
    Prescott az
    --
    685
    Quote Originally Posted by El Camexican View Post
    Are the YZ and Tri-Z transmission shaft part #’s the same?
    They’re different part #s the main shaft 1st gear is made on the shaft, z has 13 teeth the yz has 14 teeth other than that they’re identical. The drive shaft is identical but the splines for the sprocket on the z shaft are a cunt hair longer
    [/SIGPIC]
    85 350x
    83 200x-sold
    ×2 85 200x-sold
    06 kx250f-sold
    86 tecate-sold
    86 tri z powervalved
    85 BIG red
    18 rmz250
    87 lt80
    19 ttr110

  4. #4
    Join Date
    Oct 2011
    Location
    SLC, UT
    --
    88
    My opinion is that the lower first is really nice for a trike/quad. I do like wider gear ratios though. Close ratio trannys are great on an mx track, but that is not what most people do on a daily basis. I plotted the triz and yz gear ratios and the triz looks like it is much better to me. The yz 1st and 2nd are close and a big jump to 3rd.

    https://www.blocklayer.com/rpm-gear.aspx


    Click image for larger version. 

Name:	triz.JPG 
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ID:	268969Click image for larger version. 

Name:	yz.JPG 
Views:	8 
Size:	49.8 KB 
ID:	268970

  5. #5
    Join Date
    Jan 2014
    Location
    Prescott az
    --
    685
    Quote Originally Posted by legacy51 View Post
    My opinion is that the lower first is really nice for a trike/quad. I do like wider gear ratios though. Close ratio trannys are great on an mx track, but that is not what most people do on a daily basis. I plotted the triz and yz gear ratios and the triz looks like it is much better to me. The yz 1st and 2nd are close and a big jump to 3rd.

    https://www.blocklayer.com/rpm-gear.aspx


    Click image for larger version. 

Name:	triz.JPG 
Views:	8 
Size:	48.9 KB 
ID:	268969Click image for larger version. 

Name:	yz.JPG 
Views:	8 
Size:	49.8 KB 
ID:	268970
    Looks like the z trans ratio is really evenly spaced out. I’m still debating the 1st gear though I get in tight spots where sometimes 1st is too low and 2nd is too high I’m going to have to think about it for a bit
    [/SIGPIC]
    85 350x
    83 200x-sold
    ×2 85 200x-sold
    06 kx250f-sold
    86 tecate-sold
    86 tri z powervalved
    85 BIG red
    18 rmz250
    87 lt80
    19 ttr110

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