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1-10 of 11 Results
  1. YFZ450 & YFZ450R General Talk
    To start off I have a 06 Carb with a Miller ATV Ported head, 96mm 12.4:1 Wiesco Piston, barker exh, FCI and cam mod. My last dyno I had was with that new setup at it dyno at 47hp. Which I remember others saying this dyno runs about 3hp low but I feel thats not that true as I run the same as a...
  2. 05 YFZ Rescue

    According to the previous owner I'm the third owner of this quad. I offered him $500 and he took it. I bought a gasket kit for it, slapped it together and the rest is history
  3. YFZ450 & YFZ450R General Talk
    I have my old gernaded engine from my 09 yfz 450r and I was wondering what yall thought about it and if yall could give me some info/links/any input. I don't really wanna go any higher compression as mine is 12.5 and all stock besides fci intake full data exhaust and an msd blaster. I will be...
  4. 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...
  5. Parts
    In need of parts for 05 yfz 450
  6. Maintenance
    So little different than the usual posts here, hope I'm still welcomed. I am part of a team building a racecar, and the heart of said racecar is a 2019 yfz450r engine. 100mm bore and 14:1 compression running on e85. We recently had a custom shift drum made to switch the order of the gears, it is...
  7. Parts Reviews
    Looking to replace piston etc etc and valve seals, burning oil. Should I go oem w/ piston or? Lmk ASAP thanks!!
  8. YFZ450 & YFZ450R General Talk
    07 yfz 450 high compression with stock engine So i changed out the cylinder and piston on the quad after i had smoke leaking out of the exhaust head. Ended up changing out the piston and cylinder. Wanted to do it soon anyway. Put it all back together and got two very loud pops on start up...
  9. YFZ450 & YFZ450R General Talk
    Hi All, I am new to the forum and looking for some assistance, I have rebuild my 05 YFZ 450, new hot rod crank, big-end bearings, Piston and head gasket. once I finished it up, I first turned it over by hand without the spark plug and no fuel to make sure it span freely and no odd sounds, I...
  10. YFZ450 & YFZ450R General Talk
    So, I just bought a 2005 yfz450 for Christmas (2 weeks ago) The seller told me it was never rebuilt and that it was always riding on trails. Unfortunately for me, I was just putting around my yard and it blew my piston. When I had taken my top end off I found that my piston was in 5 pieces and...
1-10 of 11 Results