Page 2 of 3 FirstFirst 1 2 3 LastLast
Results 16 to 30 of 34

Thread: rebuild the 250ES and SX motors or upgrade to a runing 300?

  1. #16
    Join Date
    Mar 2007
    Location
    Texas
    --
    5,045
    ^ unless you boost it!
    ________________
    I'm just a squirrel "Trying" to get a nut!

    Nearly every kind of Honda ATC (plus some custom ones
    several Yami Quads (mostly custom built for MX racing)

    https://www.mikesatvfix.com

    "Freedom is not free...but the U.S. Marine Corps will pay most of your share."

  2. #17
    SCRAMCHARGER318 is offline At The Back Of The Pack Arm chair racerFirst time rider
    Join Date
    Sep 2008
    Location
    byron center
    --
    154

    rebuild the 250ES and SX motors or upgrade to a runing 300?

    Quote Originally Posted by The Goat View Post
    If you're not joking you're insane. If a 200x beats a 250sx stock for stock, and a 200x beats a trx300 stock for stock, how will a 300sx touch a 350x... I'm confused here... I must be. Lol

    A 300 has about the shortest gearing and slowest revving engine ever. It's.... Slow.
    well to be honest it might just be a wet dream, but with the sx gearing, and the insane amount of torque a 300 has, i think a 300sx would move pretty good. gotta remember even 2wd 300 weighs almost 200 pounds more than a stocker sx.
    also i'm gonna pump mine up a little, wiseco 10:25 to 1 piston, 2 nd biggest web cam, port job,exhuast(which is already done), hot cdi box, 200x front end on the sx. i know it defenitly wont take a 350x top speed, but it might be a good 300 fot race anyway. i can dream cant i

  3. #18
    Join Date
    Mar 2007
    Location
    Texas
    --
    5,045
    hahaaha now that's funny right there!
    ________________
    I'm just a squirrel "Trying" to get a nut!

    Nearly every kind of Honda ATC (plus some custom ones
    several Yami Quads (mostly custom built for MX racing)

    https://www.mikesatvfix.com

    "Freedom is not free...but the U.S. Marine Corps will pay most of your share."

  4. #19
    Join Date
    Oct 2007
    Location
    new brunswick
    --
    68
    i just recently purchased a running 300 for 180 bucks that had a bad axle and plastic, used the engine , carb and all the wiring and it works great, big improvment, more reliable, more mods for the engine and a rev limiter. lets just say when i shift to 5th it will bring the front tire of the ground with a 200x front end.

  5. #20
    Join Date
    Nov 2007
    Location
    Ontario, Canada
    --
    44
    Well I know this is a bit off topic.. but for $320.00 I have a 250SX engine for sale... Run AWSOME.. I will include all wiring stater.... harness... kicker, shifter.. the whole 9!

    there you do! then its original and your not messing around.

    let me know if your interested.
    Dan
    - 1984 Yamaha 225 DX- Part Out PM ME FOR PARTS!
    -1980 Honda 110-My restore project! (someday)

    And my babies
    -1998 WR400F yamaha... its sexy.
    -1985 200X-- K&N/Cobra pipe/new maier plastics/new bars/grips/motion trwist throttle/res gaurd/headlight cage/ Comis quads 200X bar pad/--- AND SOON MY SEAT REDONE BY Cosmis Quads AND A $400.00 KICK START REPAIR..

    dbadgley@mail2power.com

  6. #21
    Join Date
    Mar 2007
    Location
    Texas
    --
    5,045
    hey pimpin, sounds sweet! i have to wait till after i finish this 200 and sell it and then the 110 and sell it. i have the 110 sold already once it gets built. I have to find a solid buyer for the 200s.
    going to ask $650 for it. new top end and bottom end is gone through and resealed. so it's goign to be like a new setup. I'm also putting new cables. (breaks and throttle)
    ________________
    I'm just a squirrel "Trying" to get a nut!

    Nearly every kind of Honda ATC (plus some custom ones
    several Yami Quads (mostly custom built for MX racing)

    https://www.mikesatvfix.com

    "Freedom is not free...but the U.S. Marine Corps will pay most of your share."

  7. #22
    Join Date
    Jun 2008
    Location
    Lewiston, N.Y.
    --
    1,477
    SCRAMCHARGER318- can you post a video of your modded sx....i am trying to do mine up and i am looking for ideas. Would love to hear what it sounds like!

    Jim

    p.s. pics are nice to!

  8. #23
    Join Date
    Mar 2007
    Location
    Texas
    --
    5,045
    yea!

    hey how come no one has told me what year 300trx engine I should get? i do remember reading that the later years will nto work at all, but what years will? will any pre 2000 work?

    my 250es is going to be fairly stock except maybe a piston upgrade, but the 250sx i would love to go hog-wild on with a 300 trx motor and even work that up with a big-bore kit and stuff. I would even consider turboing that if I get a good piston and such. No kidding on that either.
    ________________
    I'm just a squirrel "Trying" to get a nut!

    Nearly every kind of Honda ATC (plus some custom ones
    several Yami Quads (mostly custom built for MX racing)

    https://www.mikesatvfix.com

    "Freedom is not free...but the U.S. Marine Corps will pay most of your share."

  9. #24
    Join Date
    Nov 2007
    Location
    Ontario, Canada
    --
    44
    kk let me know if your ever interested in will be here I am sure for a bit!
    Dan
    - 1984 Yamaha 225 DX- Part Out PM ME FOR PARTS!
    -1980 Honda 110-My restore project! (someday)

    And my babies
    -1998 WR400F yamaha... its sexy.
    -1985 200X-- K&N/Cobra pipe/new maier plastics/new bars/grips/motion trwist throttle/res gaurd/headlight cage/ Comis quads 200X bar pad/--- AND SOON MY SEAT REDONE BY Cosmis Quads AND A $400.00 KICK START REPAIR..

    dbadgley@mail2power.com

  10. #25
    Join Date
    Oct 2007
    Location
    new brunswick
    --
    68
    im not sure how to put a video on here but i would be glad to put one on here for every one to see, ill take a video tomarrow after i get home from work

  11. #26
    Join Date
    Jul 2007
    Location
    Terryville,CT
    --
    1,616
    hey oscar my buddy and his partner are the sole creators of www.turbokits.com they are the exclusive turbonetics dealer his name is grant if you call tell him you met shane on 3ww and he will try to hook you up with what he can!!
    2- 85 Tri-Z's black and Yellow
    2- 85 250SX's
    1- 85 200X
    3-ATC 70's
    2- 85 tri-zinger's who needs some parts

  12. #27
    Join Date
    Mar 2007
    Location
    Texas
    --
    5,045
    Quote Originally Posted by aproudcanadian View Post
    im not sure how to put a video on here but i would be glad to put one on here for every one to see, ill take a video tomarrow after i get home from work
    you can use my ftp upload and i'll post it for ya
    ________________
    I'm just a squirrel "Trying" to get a nut!

    Nearly every kind of Honda ATC (plus some custom ones
    several Yami Quads (mostly custom built for MX racing)

    https://www.mikesatvfix.com

    "Freedom is not free...but the U.S. Marine Corps will pay most of your share."

  13. #28
    Join Date
    Mar 2007
    Location
    Texas
    --
    5,045
    Quote Originally Posted by tri-Z ripper View Post
    hey oscar my buddy and his partner are the sole creators of www.turbokits.com they are the exclusive turbonetics dealer his name is grant if you call tell him you met shane on 3ww and he will try to hook you up with what he can!!
    SWEET! I'll do that once i'm ready. my biggest concern is mid-range tune with boost. if i'm goign up a hill and not standing on it and it's still seeing some boost, i need to make sure it's getting corect fueling. with a carb that concerns me. i'll have to research some electrical EFI ssytems. that may be the better way to go. BUT! i will test the carb way forst as it will be a TON cheaper!!!
    ________________
    I'm just a squirrel "Trying" to get a nut!

    Nearly every kind of Honda ATC (plus some custom ones
    several Yami Quads (mostly custom built for MX racing)

    https://www.mikesatvfix.com

    "Freedom is not free...but the U.S. Marine Corps will pay most of your share."

  14. #29
    Join Date
    Mar 2007
    Location
    Texas
    --
    5,045
    I still have not recieved a solid answer on what year(s) trx 300 do I need for the 85-86 250SX? i have seen 99 300trx motors going for $400 in good shape.
    ________________
    I'm just a squirrel "Trying" to get a nut!

    Nearly every kind of Honda ATC (plus some custom ones
    several Yami Quads (mostly custom built for MX racing)

    https://www.mikesatvfix.com

    "Freedom is not free...but the U.S. Marine Corps will pay most of your share."

  15. #30
    Join Date
    Oct 2007
    Location
    new brunswick
    --
    68
    mell the engine in mine is from a 89 but pretty sure all years are the same, i do no the earlier modles up to 92 have a higher rev limiter and something else different

//ArrowChat Integreation Code //