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  1. YFZ Powertrain
    So I just bought this 04 YFZ450 a week ago. It wont start with the electric start but it will start if I give it a push start. What do you think the problem is? The motor was just rebuilt, the valves are within spec, and the battery is new and fully charged. Any ideas?
  2. 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.
  3. Maintenance
    Alright, so I have a 2008 Yfz 450 Se. About a month ago I was out riding, mind you when I ride I by no means take it easy. Was 5th pinned on flat straight road and it lost all power, shut off, had a liquid on the front of the cylinder (coolant if I had to guess?) Wasn’t a ton of spraying out but...
  4. YFZ450 & YFZ450R General Talk
    I have a 09 YFZ 450 (carb) I’m not that good on working on quads but I know a bit so bare with me but everytime I start my quad the idle is high and I can hardly rev it while idling I free like im banging over the rev limiter but when I put it in gear it and ride a bit it does sound like it...
  5. YFZ450 & YFZ450R General Talk
    I have a 09 YFZ 450 its my first YFZ and would anyone happen to know exactly what the top speed of each gear is? Like if I were to drive on the road lets say the speed limit is 55 mph what gear would I stay in? Bare with me its my first time riding a sports quad besides that if anyone has any...
  6. Maintenance
    So, im looking at putting a light bar on my '06 yfz 450. Can anyone tell me how much power the stock stator makes and if the extra load on the battery could be an issue... my biggest concern is obviously being able to make enough power to run the bar and the headlights and tailight. I would be...
  7. Maintenance
    Hey there, So i just bought a 2004 yfz 450. When i bought it itook it for a test drive and it ran great. So the next day i go out to ride it and it starts right up. So i try to ride i rode for 1 min and the i stalled it out. It was cold (-20) and i think the engine cooled down and i couldent...
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