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bunghole731

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About bunghole731

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    TT Member

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  • Location
    California
  1. bunghole731

    YZ125 lacking top end?

    Before i get into jetting, im cleaning and repacking my silencer, finishing the top end, and cleaning the carb. Im running 40:1, i think the previous owner was mixing 32:1 and i never rejeted for it so im thinking that could be a part of the problem.
  2. bunghole731

    YZ125 lacking top end?

    got the top end started. lots of ring blow by. tell me what you think powervalve had quite a lot of unburned oil and gunk in it. How the head looked upon opening. looks rich?
  3. bunghole731

    YZ125 lacking top end?

    so im a little confused on the timing, This is at tdc, the punch mark on the flywheel is past the mark on the stator by quite a bit, but theres another mark thats directly lined up at tdc...
  4. bunghole731

    YZ125 lacking top end?

    Never any coolant, that i know of... Just rode it up and down the street to kind of pinpoint it, 1st gear revs out and sounds good, same with 2nd, then i click third and half of the time it would either rev up fine or choke up and bobble right after mid way through the throttle. Didnt get into 4th, the streets not long enough. gruberyz, kind of sounds like whats happening to mine... also it took forever to start, it is cold, but dang i was kicking for a while. After its warm it starts 1st kick though.
  5. bunghole731

    YZ125 lacking top end?

    I agree, i think its just time for a top end. Timing is all good, ill check the PV when its all torn down. Just ordered a top end so ill update this thread once i get it apart and figured out. Thanks for the help, i appreciate it.
  6. bunghole731

    YZ125 lacking top end?

    Yes i took the head off looked at the cylinder and piston everything was fine. Actually heres some pictures of when i first got it...
  7. bunghole731

    YZ125 lacking top end?

    The top end on it now is the original. bought it used with almost no hours. Watching some footage is seems i run around mid to top of the rpm, just because it cuts out at higher other wise id be on it more. As for the jetting, when i got the bike i checked it cold, original plug, thats what im going off of... How do i tell if the powervalve is working properly when im doing the top end? what to look for?
  8. bunghole731

    YZ125 lacking top end?

    Air filter cleaned and oiled every ride. Jetting looks to be perfect, from plug and the piston top. The top end has some hours on it, but i have noticed this issue since day 1 Most of the time it starts to sign off before the throttle stops twisting.
  9. bunghole731

    YZ125 lacking top end?

    "I read in Eric Gorr's new book that the more advanced the timing the harder mid range hit and flat top,, retard, and you get rev to the moon. I also read that I need to raise the ports but that will have to wait till cold weather " I found this on dirtrider while i was searching for timing info, pretty interesting because my bike seems to have good power throughout the mid range to a little top but then it just falls.
  10. bunghole731

    YZ125 lacking top end?

    I havent checked compression, need a tester. I plan to grab one when i do the top end here soon. Timing?so you mean the flywheel? And the pipe condition is fine, the first things that i thought of were leaks in the pipe? or maybe the silencer packing is blocking up? Thanks for the help btw.
  11. bunghole731

    YZ125 lacking top end?

    Hey guys, so lately the times ive been riding my 125 and the top end seems to not pull as hard as it should. Ive been watching other videos of 125's and they seem to "rev to the moon" while mine signs off way earlier in the rpms. Im not really sure what the problem is let alone how to go about finding out so i figured id ask you all. Also its a fairly new motor, around 28 hours getting ready for a new top end here pretty soon, but the problem has remained constant ever since ive had it. Jetting is spot on as well. 2005 yz with stock pipe and silencer.
  12. bunghole731

    Oregon Desert Singletrack

    sweet vid. i am also new to the go pro scene, and im wondering how you uploaded your footage to youtube in HD? I put mine on there and it looks so much worse than the actual film.
  13. bunghole731

    post your cleanest bike pic

    had it for about 2 weeks now, couldn't be happier
  14. bunghole731

    Who has the nicest Yamaha?

    i guess i'll play.
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