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  1. Headlight dead.. Kinda

    Yamaha YFZ450/450R (2004-Present)
    Hey guys! ive got a 2005 bill balance edition, i parked it almost a year ago and have recently started working on it again to sell it. I had the bright idea to smoke the headlights so they've been out for a while, im just getting them back in and they wont turn on... ive tested the relays and...
  2. ***NEW*** Sprocket Guard ATV - YFZ, KTM, LTR Single Side up to 39T Sprocket

    Parts for Sale
    $65.00 Each These are a first run of new sprocket guards. They are 3/8" 6061-T6 and have a ground smooth finish (Blanchard Ground Finish). They for sure fit YFZ as we mounted one on a Yamaha for Dunefest 2016 and had Zero issues for the entire weekend. They also have a bolt pattern for KTM 450...
  3. 2004 YFZ 450 Burning CDI after 10 minutes

    Yamaha YFZ450/450R (2004-Present)
    I have reached my wits end on what to do regarding my CDI box. I have a 2004 YFZ 450 that I am working to get back in running condition to sell and continue having an issue with the CDI box. I have replaced the CDI box several times in the past month while making minor changes to the electrical...
  4. 04 yfz carb problems

    Yamaha YFZ450/450R (2004-Present)
    I recently bought all new internals for my 04 yfz450 carb. New gaskets, rejeted, new diaphragms, springs, the whole 9 yards. When I put it back together and put it on my yfz, as soon as the yfz starts it revs to high rpms and dies. I have no idea what could be happening I have rebuilt carbs in...
  5. 05 yfz dies while riding

    Yamaha YFZ450/450R (2004-Present)
    Hey everyone, I just got my yfz a few weeks ago and I cant seem to get it lined out! It will start up and idle all day long but when you go to ride it, it only runs for a few minutes and then starts to cut out and eventually dies. It was in pieces when I bought it. The motor was together but I...
  6. need yfz parts!

    Parts for Sale
    Looking for various parts for an 08 yfz, my upper balljoints are getting real loose so im looking for new or used A arms for a decent price, can be +2 but need to be usable with stock shocks. Also looking for an axle with good splines along with the sprocket hub. May be interested in other parts...
  7. Please help ASAP !!!!!

    Yamaha YFZ450/450R (2004-Present)
    I'm 15 and my dad said I can get a quad for around 3000$ I love speed and I love raptors and I love yzf450!&ive never rode neither of em!(it'll be my feat quad ) I'm 110lbs &5'7 Is 450going to be too big for me? Or raptor 660will be too big? Please help ASAP
  8. YFZ 450 Pro Bike Never Raced

    ATVs for Sale
    Spared no expense, Race Ready This a YFZ 450, This quad was built to run the pro am production class, however it was only built to be used as a backup. The bike has never been raced. I had the quad custom built by BBM company in Illinois. Its a stock frame with a full gusset kit and powder...
  9. building my yfz.. right this time..

    Yamaha YFZ450/450R (2004-Present)
    hi guys, im bobby. i have been riding and fixing bikes and atvs (mostly all yamaha) for a long time but im new to the forum thing. ive really learned alot from you guys, thanks for putting this out there for us. i am building my 2008 yfz450r again after letting friends tear it up. (you can...
  10. YFZ450 Parts!

    Parts for Sale
    2005 YFZ White gusseted frame. $200 shipped Gas tank $30 shipped Stock Swingarm with carrier,disc,sprocket,axle. $175 shipped Stock steering stem black $50 shipped Renthal bars $25 shipped. Radiator and fan $40 shipped. All of these parts are located in CT. I normally arnt on the computer so...
  11. should i buy this

    Yamaha YFZ450/450R (2004-Present)
    alrite guys i new here and this is my first post.. so rite now i have a kfx 400 and my friend has a yfz 450 2004..he told me that he would trade me but his yfz needs a crank case and chain.. a tune up becuase its been sitting for a while.. it has a high compresion piston and some other things i...
  12. What would the best year(s) of yfz 450's to get?

    Other Sales
    i am somewhat new to the quad world, right now im driving a '87 mojave that my cousin gave to me that he raced a little while, its pretty awsome. Btw if anyone knows where to get some swing arm bushings and a rear axle racing spocket please tell me, need some. But anyways, to get to the main...
  13. need help 2006 yfz450 water pump breather hose

    Yamaha YFZ450/450R (2004-Present)
    I cant figure out why the quad is leaking coolant out of the water pump breather hose..... some 2006's dont even have the breather hose and i cant figure out why it keeps leaking after a quick warm up ride...any comments or suggestions?
  14. YFZ450 white front fenders and side plastics

    I am looking for yfz450 04-07 white front fenders and side plastics in decent shape.
  15. YFZ 450 rev limiter

    Yamaha YFZ450/450R (2004-Present)
    I recently took my yfz450 to the shop and had a big bore kit installed with new cams. Ran fine before upgrades. It starts and idles fine but when i giv it throttle, about a quarter throttle it breaks up like its hitting the rev limiter. All the clips for the harness are clean and properly...
  16. awesome video!

    Media (quad-related only)
    what do you guys think?
  17. new piggy back rezzy and drag shocks

    Parts for Sale
    got a few pair of these rezzy piggy back shocks. measurements and colors are below. got only a few pairs of these.. you will need a 3/8ths washer for each so it dont slide works on banshees, blasters, warriors. yfz 450's ltr 450,s raptors. these will lower your atv by an inch or so, depending on...
  18. yfz 450 problem

    Yamaha YFZ450/450R (2004-Present)
    Im gonna trade my snowmobile for a 2007 yamaha yfz 450 SE, and he said it runs but has oil getiing into the air filter? what could cause this?
  19. Planing Ahead & Found Something Odd

    Yamaha YFZ450/450R (2004-Present)
    I'm planing on getting a 05-06 YFZ this winter to replace the ole proven warrior. I'm really stoked and always looking at aftermarket to get for it. What do you guys think of this pipe. Does anybody that has this model have any feedback on it's perfomance. Gettin it in the Bill Balance Eddition...