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  1. New Member Intros
    Been having problems starting my 2008 YFZ450. Just got it used yesterday on a trade. Was told it needed a new battery from the previous owner which I later bought a brand new gold series battery for it after the deal. The guy did bring a jump pack with him to prove it ran and it fired right up...
  2. Maintenance
    Been having problems starting my 2008 YFZ450. Just got it used yesterday on a trade. Was told it needed a new battery from the previous owner which I later bought a brand new gold series battery for it after the deal. The guy did bring a jump pack with him to prove it ran and it fired right up...
  3. Quad Projects
    So I have 2008 yfz450 478cc pump gas piston and hot rods crank, i am wanting to make it fuel injected i know I'll need the throttle body, ecu, wiring, the new battery box, fuel pump, and grab bar but issue is I dont want to swap the plastics so I can do the different fuel tank any ideas on how...
  4. YFZ450 & YFZ450R General Talk
    Hey everyone. I have a question regarding a yfz450 2008 carb engine. Will I be able to build it into a 2014 yfz450r without needing a conversion kit for the fuel injection or anything? Please if anyone knows, let me know.
  5. YFZ450 & YFZ450R General Talk
    I have a 09 Yfz 450 and im planning on getting new a arms right now they are stock but if I were to get +2 +1 would I have to get spacers for the back axle if so how many inches? Or any tips on the best a arm sizes to run I really want to put on high clearance/long travel a arms but will I have...
  6. YFZ450 & YFZ450R General Talk
    Can I use the front wheel hubs from a 2020 YFZ450r on a 2006 YFZ450? I need wheel hubs and found a nice set from a 2020 model. Can I use them on my 2006? Any mods to make them work? Brake Rotors? Thanks for your time.
  7. Maintenance
    Hello everyone! I recently purchased a 2008 yfz450 that I noticed is leaking coolant from the weep hole at a decent rate. I found the leak and noticed it pretty early. Was curious what all is recommended to change when I plan to have the water pump opened up to rebuild? I was planning to...
  8. New Member Intros
    Hello, does anyone sell a cylinder head for a Yamahu YFZ450 2006?
  9. YFZ450 & YFZ450R General Talk
    Just got my quad back from being fixed, had a new wiring harness out on it started and then I took the spark plug out and put a new one in and wouldn’t turn on checked for spark and there was nothing. What should I try
  10. YFZ450 & YFZ450R General Talk
    I just bought a yfz450 I’m told it has 14.5 compression and he ran it on vp c45, I’m new to quads but read that c45 has a motor octane of 108. What other gas can I be using that’s common to find. Do I just need to find 108 octane gas or what will all work. I mostly just ride trails.Also it has a...
  11. YFZ450 & YFZ450R General Talk
    05 yfz electric start button only Worked when I put it in 1st gear and didn’t work in neutral now doesn’t work at all.please help!
  12. Quad Projects
    Hey everyone! I have a 2005 model yfz450. I opened up the inside to change the crankshaft. My connecting rod was snapped. And found all these medicine tablet looking metal pieces inside. Not sure where they’re from? What do you guys think? All the bearings seem to be good.. And about the right...
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