The official XT225 thread!

Discussion in 'Thumpers' started by wickerman777, Nov 4, 2006.

  1. HardWorkingDog

    HardWorkingDog Harvey Mushman

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    Wow, that's impressive. Thanks for changing my expectations!
  2. heirhead

    heirhead worlds worst mechanic

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    Hello,

    Bought,
    2007 with 800 miles LIKE NEW in Socal $2,000 in 2009
    2006 with 4100 miles in Socal used properly $1300 in 2011

    Heirhead
  3. Crazy Canadian

    Crazy Canadian All who wander r not lost

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    I live in San Diego and would sell you mine with less then 4000 miles on it for that price... Heck I will find five more to sell you at that price! No I am not seriously lookign to sell but that is a crazy price.
  4. Crazy Canadian

    Crazy Canadian All who wander r not lost

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  5. dav_dman

    dav_dman Been here awhile

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    dont do it. it'll just be louder and leaner , and your too lean already from the factory.

    jetting should be your first priority, but if you bent on doing something quick and easy then the z1 mod might be okay without rejet...not sure. Like i said, jetting needs fixed first.
  6. dav_dman

    dav_dman Been here awhile

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    i've never seen a big bore 225 so would you mind keeping us updated or starting a thread when you do it? none on xt225.com i could find either.
  7. Lizrdbrth

    Lizrdbrth Wackjob

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    I believe Muniac and others have thoroughy thrashed some big bores, though I'm not sure of their build specifics.. Actually was hoping he'd chime in or check his messages as I can't seem to join the site.

    I'm a TW guy. Same motor, same heads, same basic hardware but a bit more involved (case mouths, output shafts, etc.) in building ours, The TW motors still have all STEEL innards (oil pump gears, etc.) in some places where their cousins now have plastic which may be of interest to XT/TTR builders and vice-versa.

    I'm building a "big, but mild" 6-speed motor for mine. We have some 250cc+ big bore strokers among us and at least one 74mm bore that is thus far only been dyno'd., None of them have yet seen the kind of miles I have planned.. Figgered some of you might have gone 72 or larger.
  8. Dirt2Street

    Dirt2Street Adventurer

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    I'm okay with the noise change.. :p
    So there really isn't anything I can do without rejetting it..? I don't have the experince to do it. I mean, I can work on them and all but rejetting has been the only thing I've never had to do.
  9. heirhead

    heirhead worlds worst mechanic

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    Hey CC,

    Thought about looking at that one myself but bought a 95 dr350 with goodies, tank, ricors, new tires, sprockets, chain,
    rack. Something between my tw,xt and dr. To big, to small syndrome.

    Heirhead
  10. kewlbyme

    kewlbyme Occasional Partaker

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    There is just not a lot of hidden power there to find. Yes you can do everything to make it run smoother, better and snappier for what it is, but there arent even 10% more ponies in there.

    I know I am preaching to the choir, but the engineers that design these bikes do a pretty good job. They have to deal with govt regs crap, like emissions and safety switches to protect us from ourselves AND make a bike that is dependable and ride worthy. Compromises. They do a pretty awesome job. Whatever the bike platform, we can effect it a small percentage, but if we do too much trying to make a bike something it is not, we screw something else about it up.

    Everything is a balance. I think most would agree that most carb bikes probably come from the factory in a lean condition, maybe to help meet emissions requirements. To me, that means we have to get a little more gas into the existing flow to correct that. If you just "open up the airbox", that just makes it more lean. Wrong direction.

    What little bit of extra power hidden in there is usually released by giving the flow more gas. More gas generally equals more power. You wont get more power by giving it less fuel. Well, remember the balance. Gas is mixed with air in proper sized proportions and bites, then the exhaust is pushed out. To release the small amount of power that may be in there, you have to give it more gas AND more air to retain the proportions. Well, more gas and air yields more exhaust. The stock exhaust is designed to remain quiet and suppress sparks while letting out the exhaust created by the stock amount of gas and air. If you give it more gas and air, you have to allow a corresponding increase of exhaust to be pushed out with a more open after market exhaust.or drill out the stock exhaust to allow more exhaust gasses to escape. Balance and proportion.

    So, when folks go for broke for all the available power that a particular bike can possibly create, they "open 'er up". Both ends and in the middle. Thus, bigger jets to let more gas in, less restrictive airbox to let in more air to mix with the more gas, and an aftermarket or drilled out stock exhaust that will allow the increased exhaust gasses to escape.

    All in proportion.

    I like stock and quiet exhausts and airboxes. Yes, an opened airbox is irritatingly loud too. Yet I dont want my bike to be lean nor rich (although that changes with atmospheric pressure, altitude, humidity, etc), and I want it to have a responsive throttle and all the power it was designed to have before the govt screwed around with it.

    So, HERE is my solution over on the specialty site. I slightly increased my jet sizes to allow a little more gas. Theoretically, to overcome the govt mandated factory lean condition at my elevation. Stock airbox and exhaust.

    And, dont forget a nice clean carb is better. And dont forget to mess with the pilot screw to fine tune low rpm response.

    I am VERY happy with the results.

    So, please, no. Dont just open up your airbox..
  11. heirhead

    heirhead worlds worst mechanic

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    Hello,

    +1 on all you said.
    On my first xt did all of the mods.
    Likes: No more popping sounds, a little smoother, a little more power.
    Dislikes; Louder, 60 mpg instead of 75. No likee.

    Next xt just a little bigger jet and 2.5 turns out.
    Like: very quiet, no more popping, smoother, 75 mpg. can't tell power difference.
    Dislikes; None
  12. kewlbyme

    kewlbyme Occasional Partaker

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    My experience duplicates yours. I have done the same with both my xt's with identical results.

    Mine popped like a popcorn machine. Almost always an indication of lean. My 03 was terribly neglected before I rescued it, so just a good cleaning of the carb and jet orifices helped a lot. Then the larger main and pilot really solved all the issues as you describe.

    I am running a 127.5 main, a 42.5 pilot with 2.75 turns out on the pilot adjust screw. They run awesomely!. They start easily, fast warm up and snappy over all. Throttle response is great at all rpm's and when I close the throttle, the rpms fall right to idle as they should. No more of that hanging high rpm crap.

    I hesitate to say that it increased the power. I think they just run like they are supposed to now. So, I guess back to regular power from crippled power sure feels like an increase.

    I cannot overstate the difference from when I got them and how pleased I am with the way they run now.
  13. damasovi

    damasovi Long timer

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    Thanks to everybody who has comment on my dilemma, I knew this guy was talking lies! and maybe the price is for barganning, still it was too high.

    This bikes you mentions are very cool, I had a XR250 Tornado and the bros 125 from honda, and the 250 Lander from Yamaha are fine bikes, just one problem, they are too tall! so the xt225 or 250 that don't come here are shorter... I know i know! the Falcon NX400 is as tall as my KLR650 but that is now what I want in my 2nd bike.

    Since I can't buy a bike now I will continue to shop in craiglist

    Gracias!!!

    Damasovi
  14. Dirt2Street

    Dirt2Street Adventurer

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    I guess I never really thought about it that way. I knew they came lean..I think i just got a bit ahead of myself in wanting it to have a different sound and wasn't thinking about the air-to-gas mixture. THANKS A LOT for stopping me from doing something soo stupid. Jets will definitely be first!
  15. nuggets

    nuggets It's all my fault...

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    I am working on installing heated grips.

    Switch bracket:
    [​IMG]

    Installed on bike:
    [​IMG]

    I made sure to clearance the back of the bracket so that it sits nice and flat on the clamp:
    [​IMG]

    I haven't started on the heating elements yet, since I want to ride the bike today.
  16. kewlbyme

    kewlbyme Occasional Partaker

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    My pleasure, my friend. Not stupid at all. If you have never messed with this stuff, how would you know? This stuff is not hard, you can do it if I can. I am no guru by any measure. Just read here and over at the other site. If you cant find a clear answer, feel free to ask. Someone will know.

    If you are going to do the exhaust and airbox mods, most start with a 130 main and 42.5 pilot. Some use 135/45. I like JetsRus for jets. Just clean the carb good while you are at it.
  17. Crazy Canadian

    Crazy Canadian All who wander r not lost

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    Is there enough power for head grips out of our little bikes? I worry about putting anymore strain on the electrical then I have to...
  18. nuggets

    nuggets It's all my fault...

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    I don't have any signals, so I have a little less power draw than normal. I think it will be fine. I might switch the taillight to LED also.
  19. BroncoDave

    BroncoDave Long timer

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    What is the output on a 01 ?
  20. nuggets

    nuggets It's all my fault...

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    Got my rear brake a little hot last night. :huh

    [​IMG]

    [​IMG]