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Thread: TriZ guys what size jet?

  1. #1
    Join Date
    May 2005
    Location
    Hobart, Oklahoma
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    570

    TriZ guys what size jet?

    I ordered main jets from 400-500, but only got about half of them. I got 400, 410, 430, 460, and 490. I was using the 460 with the needle at the leanest setting and it still seems to be to rich. I just put the 430 in, but I'm a little nervous that it may be to small. I'll do a plug check when I go riding on Wenesday. What size do you guys run? If it is to small how long does it take to mess the engine up?

    I run BM oil 42:1, dual stage reeds, no airbox cover, and uni filter.

  2. #2
    Join Date
    Oct 2003
    Location
    Watertown, New York 13601
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    3,382
    back when i only had them mods i was running a 470 main witch is stock, with the clip on the second notch from the top. I never went below the stock size main on my z. to lean.
    1985 YAMAHA TRI-Z 250 sold

    2006 YFZ 450

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