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  1. Need help upgrading my rappy 250! Thanks!

    YFZ450 & YFZ450R General talk
    Hi everyone this is my first post on any forum ever lol. I’ve been reading forums for a long time, just haven’t ever posted... Any input on my new bike build would be much appreciated! I am going to pick up a 2008 raptor 250 se (orange edition) today and want to trick this thing out!!! The...
  2. 2005 YFZ 450 breaking up at constant throttle

    I have a race bike that has a yoshi tri oval exhaust and a 4.5 inch intake with no lid for some reason it has been breaking up whenever you hold the throttle at a constant rpm, I have a video that I can text to someone if anyone is willing to help, thank you! 740-319-6280
  3. New YFZ owner!

    New Member Intros
    Hey, guys I just bought a 2008 yfz450se and I'm mainly doing trail riding with buddies. I have a couple of mods that are simple I just have to rebuild the carb, change oil and buy an air filter. I saved up over the years so any mods or ideas budget-friendly would be greatly appreciated!
  4. Advice Needed (2006 YFZ 450)

    Hey there I'm new to this community and actually just bought my first quad last week, so any advice would be much appreciated! I just came back from a dune trip to the Sand Lake Dunes in Oregon and purchased a 2006 YFZ 450 (bill ballance edition) just so that I could ride with my friends and...
  5. Problem with headlights not working on a 2008 yfz 450se

    Headlights won’t work. Replaced the bulbs and battery for the quad. Took the headlight and used some wire and connected it to the battery directly and it turns on. Power to where the headlight wires connect to the wiring harness. Know switch works because I hooked it up to my voltage meter and...
  6. Need jetting advice 08 yfz450

    So i’ve been having an issue with my 2008 yfz450, i’ve been running super lean as to where I backfire any time I shift or let off the gas or really anything.. sometimes shoot flames. Right now I have a full jdjetting setup with a 175 main jet (the biggest that JDJetting has) and I think that’s...
  7. Sprocket size for 525 icejug big bore 13.1 high compression

    YFZ450 & YFZ450R General talk
    What sprocket combo should I use for the 1/8 in sand? At Silver lake dunes with 22X11 ITP sand paddles stock swingarm I wanna try 2nd gear launch Yfz450
  8. YFZ450 12’ carb best top end rebuild kit

    Parts Reviews
    Looking to replace piston etc etc and valve seals, burning oil. Should I go oem w/ piston or? Lmk ASAP thanks!!