Yamaha YZ 250 2018 Two Smoke!

Discussion in '2 smokers' started by WildAnCrazymtl, Mar 30, 2018.

  1. nacho squatcho

    nacho squatcho Been here awhile

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    I love how the X just chews that stuff up. I feel like the bike is so good at staying in line vs my previous pds KTM. I can run the suspension firmer than I could on that bike and hit the rough stuff at a faster pace and it just floats over it. I love it!
  2. Hipower90

    Hipower90 I’ve breathed the mtn air, man

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    3B68288D-77EC-4D8E-A443-60EC0FB8D4A9.jpeg A87B1FF7-31CA-46A4-9150-51B29D63FB07.jpeg
    nacho squatcho likes this.
  3. turbo_bird

    turbo_bird I'd rather be riding.

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    May 14, 2007
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    419
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    Anyone have any experience with rebuilding the suspension on these? I blew out a seal on my rear shock on Sunday, might as well do a bit of a revalve when I pull it apart. I wonder what the valving differences between the motocross yz is compared to the x, or maybe I should send it out for the work and get the front done at the same time.
    Kristian
  4. Yard Sale

    Yard Sale let's be bad guys

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    I've rebuilt the forks a few times myself, re-sprung the shock, and gave the shock to somebody else for a rebuild, mainly because of the nitrogen fill. People on Thumpertalk probably know the valving specs.
  5. Yard Sale

    Yard Sale let's be bad guys

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    Good dog. Nice horsie. Good bike.

    [​IMG]
    nacho squatcho likes this.
  6. nacho squatcho

    nacho squatcho Been here awhile

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    Epic conditions in the desert yesterday :bandit
    13BA5A2D-ABC5-4875-A049-1FED0AAA5487.jpeg 0B6EAB99-3DCD-4B45-AF88-4875108B1E45.jpeg FC350204-BDA1-4A7D-AB48-FF21ADD846F6.jpeg 480F7FA5-4F86-479C-8F51-8BD46D7248F0.jpeg 81312A47-6FF2-421F-AAAB-990A82EADBDF.jpeg 72427049-2423-428A-BECD-FDD9B001559C.jpeg A8335120-A5A8-4578-824C-61C098A62386.jpeg
  7. Hipower90

    Hipower90 I’ve breathed the mtn air, man

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    Today on the B bike on my trails at the house in the NC mtns

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  8. Hipower90

    Hipower90 I’ve breathed the mtn air, man

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  9. turbo_bird

    turbo_bird I'd rather be riding.

    Joined:
    May 14, 2007
    Oddometer:
    419
    Location:
    Kamloops, BC, Canada
    I ended up rebuilding my blown shock myself, left the valving alone though. I put a 5.8 rear spring (heaviest one that the racetech calculator would pair with the stock front springs) on the bike and used 3 weight oil in the shock, feels a bunch better now. I also put fresh linkage bearings in. I just have to get better at riding it now.
    IMG_20200321_145832.jpg
    Kristian
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  10. Yard Sale

    Yard Sale let's be bad guys

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    I'm in the middle of a full rebuild of my 2006, first time I've split the cases on it. Greasing chassis bearings and replacing seals, rebuilding crank, replacing main bearings and transmission bearings and seals, replating cylinder, etc. I'm also installing the tall 5th gear from the X.

    [​IMG]
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    [​IMG]
    [​IMG]
  11. Hipower90

    Hipower90 I’ve breathed the mtn air, man

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    Few days ago. Secret stash in the Nc mtns.

    Bearded Hooligan likes this.
  12. Hipower90

    Hipower90 I’ve breathed the mtn air, man

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  13. turbo_bird

    turbo_bird I'd rather be riding.

    Joined:
    May 14, 2007
    Oddometer:
    419
    Location:
    Kamloops, BC, Canada
    What do you need for parts to put the tall 5th gear in? I haven't seen anyone do just 5th,keep us posted on how it works out. I've thought about trying to find wr426 transmission gears to put in mine.
    Kristian
  14. Yard Sale

    Yard Sale let's be bad guys

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    Two gears, three circlips, and molybdenum grease.
  15. Hipower90

    Hipower90 I’ve breathed the mtn air, man

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    Today
    1BD1269F-D8C1-4487-A695-D858B42D79E6.jpeg F2EE686A-A08F-4C80-B009-BE213FC42F91.jpeg 13C635F5-5E79-4796-845E-39C582EFDF5C.jpeg F799518A-6402-4987-A7A0-0868C85DCABB.jpeg
  16. turbo_bird

    turbo_bird I'd rather be riding.

    Joined:
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    Kamloops, BC, Canada
    Cool, let us know how the jump to 5th is for riding. I've thought about doing a complete WR tranny swap, but not sure how the bigger gaps would be for general trail riding. It would probably work ok for me, as I'm a pretty relaxed rider usually. Maybe I should just watch for a complete transmission on ebay and experiment. The 250X uses 3rd to 5th from the WR, but that puts 3rd even closer to second.
    Kristian
  17. Yard Sale

    Yard Sale let's be bad guys

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    Tall 5th gear worked perfectly as a road/two track cruising gear with 13/51 sprockets. The spacing from 4th to 5th is fine, even if I don't rev out 4th.



    The rebuilt bike felt smoother and for some reason (new damper?) handled much better at low speed.

    This rebuild ended up with dead-on optimum squish clearance (.040") and some extra compression compared to previous rebuilds.
    turbo_bird and nacho squatcho like this.
  18. turbo_bird

    turbo_bird I'd rather be riding.

    Joined:
    May 14, 2007
    Oddometer:
    419
    Location:
    Kamloops, BC, Canada
    Cool, good to know. I'm currently running 13/49, and it would be nice sometimes to have a taller cruising gear for the faster sections. Squish is another thing I'll have to check out when I do my top end too, eventually.
    Kristian
  19. Hipower90

    Hipower90 I’ve breathed the mtn air, man

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    Going up that section in the vid above.

    Stock X, 13-51, 9oz Steahly, very worn Tusk Hybrid.