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cameron6741

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About cameron6741

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  1. cameron6741

    Fouling plugs all the time! PLEASE HELP!

    Thanks guys! I’m gonna stop at Lowe’s tonight for a roll pin, and if that doesn’t work good, ill revert to Peening it. if THAT messes up, I’m comfortable with my effort to jerry rig this right and will order a new one! Thanks a bunch for the advice! it seems y’all reccomend seam of roll pin should be away from the actual spring so it doesn’t eat at it? sent Cylinder off today, new seals on the way
  2. cameron6741

    Fouling plugs all the time! PLEASE HELP!

    Thanks for your help on those compounds, but it turns out a bottle of that stuff is more expensive than a new power valve!
  3. cameron6741

    Fouling plugs all the time! PLEASE HELP!

    anyone?
  4. cameron6741

    Fouling plugs all the time! PLEASE HELP!

    Hey everyone, As promised, here are some pictures of the bike all torn down, as you can see there is no cross hatching in the cylinder and even some visual scarring. this scarring was there when I did the rebuild, but is smooth to the touch so I let it slide (pun intended). It seems it hasn’t got any worse since when I redid the top end and didn’t have all this oil, so I don’t think this is where all the oil is coming from, but still could use some attention. So I’m guessing y’all are recommending that I go ahead and get it replated. Is there any good places you recommend sending the head off to in order to be replated? I had a buddy who used a place called Millennium Technologies, any of y’all have any experience with em? Or any other shops you recommend? Side note: what is the difference between re-sleeving a cylinder and plating a cylinder? Or are they the same? Side note 2: if I don’t tear the gasket upon removal, can I reuse these gaskets or is there a true reason they need to be replaced every damn time? Also attached is a picture of the piston and reeds. You can see lots of burnt oil on top of the cylinder, Moreso than I’ve ever seen before. No gaps in the reeds either, but if they truly do “fatigue” in 30ish hours I’ll go ahead and replace them. All in all,for the oil problem , Im thinking crank seals could use some replacing, and will go Ahead and do that. Thanks to the gentleman with the thread on float height, I’ll be sure it’s set correctly while it’s all apart. But as some of us know, a tear down can bring about unforeseen problems... Let’s consider this issue separate from the rest... as you can see in the final attachment, I have a power valve (right side) that popped its little positioning pin out of the actual valve. Unfortunately, this is not new. Last time I did a rebuild, this same valve popped the same pin out. I thought this was just a fluke, and proceeded to hammer the pin back into position. However, after only about 12 riding hours, the pin already popped out. Does anyone have any recommendations for some sort of “metal glue” to keep this thing in place? I was thinking JB weld, but thought I’d inquire with y’all first if you have any other recommendations, as it seems dumb to order a whole new power valve for an issue so trivial. Thoughts? Thanks a bunch!
  5. cameron6741

    Fouling plugs all the time! PLEASE HELP!

    I’ll tear the bike down and post pictures of cylinder this evening. im sure this is a no no but why is the Nikasil so important? What would happen if I did hone it past the plate and tried to install top end? Would the motor seize or something?
  6. cameron6741

    Fouling plugs all the time! PLEASE HELP!

    When I rebuilt it about 12 hours ago there was absolutely zero crosshatching left, but cylinder walls were smooth. Tbh I had never heard of crosshatching until talking with a mechanic friend of mine that used to work on C130’s who looked at me crazy for not honing cylinder. Second, why does everyone keep saying not to hone the cylinder with the flex hone tool? I get it’s some special metal and just a plate but removing nano-meters of the plate to get a crosshatch does not seem bad to me.
  7. cameron6741

    Fouling plugs all the time! PLEASE HELP!

    I did not measure it before, I do believe it to be stock size, but I’ll go ahead and check it before I order the new piston and rings, I was just wondering if anyone with stock size has gone .02” oversized with any luck? With regards to the honing tool, I bought the flex HONe, which is still OK to use a Nikasil plating, you just don’t want to do it very long, just about 5-10 seconds to get the cross hatch pattern. Thanks you for your input!
  8. cameron6741

    Fouling plugs all the time! PLEASE HELP!

    with regards to the piston size, i just ordered the stock size before. Has anyone tried putting the .02" oversized piston into the stock cylinder for better compression or would the cylinder need to bored out to make that piston fit?
  9. cameron6741

    Fouling plugs all the time! PLEASE HELP!

    so heres what im getting needs to be done: -Top end: i didnt hone the cylinder on this last rebuild so ill be sure to do that this time so the piston rings seat better. -Reeds -Crank seals, at least the right one (BTW is it reccomended to replace the bearnings too or is that too much work?) I still think this is where all the oil is coming from, my bike will blow extremely thick smoke if i let it idle for a minute or two and then give it gas, similar to a youtube video i saw of a bike with a blown crank seal any other reccomendations? i really appreciate all the help from yall!
  10. cameron6741

    Fouling plugs all the time! PLEASE HELP!

    What do consider 'good' compression in a 125cc motor? 165?
  11. cameron6741

    Fouling plugs all the time! PLEASE HELP!

    I did not know this, thank you very much for your input, I’ll order some reeds too!
  12. cameron6741

    Fouling plugs all the time! PLEASE HELP!

    What exactly do you mean by stuffed reeds? I’ve heard of bent or ‘stretched’ reeds when there the stock stock metal ones but I know mine some sort of fiberglass reed since i saw them while redoing the top end. Also, I get compression isn’t stellar, but it’s likely not the cause of this issue, I will likely redo top end once I get this oil issue solved. I’ve been told 120-130 is time to rebuild, who knows, maybe I’ll do it all at once. After further research from suggestions about the crank seal, I highly agree this is the issue, or at least the source of all this oil, I saw a video of a 125 with a blown crank seal and put out just as much smoke as I have been seeing out of my bike. Do you guys reccomend replacing the seals on both sides while I’m messing with it? What about the bearing on the wet side, is that worth it if I’m on top of oil changes? Also, what is the grease stuff that sonofabe mentioned for the seals? Thanks for your suggestions! Please keep em coming!
  13. Hey everyone, New to thumpertalk but have stumbled accross an issue with my 2003 YZ 125 two stroke that i cant seem to pinpoint or resolve on my own, was hoping to get some guidance/ help. here's whats going on... For background, I purchased this bike about a year ago and when i did, the bike was fouling plugs pretty often. I solved this problem by purchasing a JD Jetting kit from Motosport, and had not fouled a plug since replacing the jetting with those that came in the kit and had a golden plug (indicating a good air/fuel ratio)... until one day i went riding a couple weeks ago and randomly fouled a plug. it had been a while since it had been replaced, so i figured it was just an old plug. after replacing the plug with a new one, i fouled ANOTHER plug that same ride. I didnt do anything about it at this point. Christmas comes around and i got a new FMF turbine core 2.1, and went ahead and put it on the bike. Previously, i had an old stock silencer on the bike and had never changed the packing on it (also i have an FMF fatty on the front end of pipe since purchase). after installing the pipe and making no other adjustments, i noticed the bike felt restricted when i drove it, almost like it was not getting enough fuel because it was not popping the front wheel up as easily as it usually did. I also noticed at the end of the ride that i had black splooge, or unburned oil, around the exit port of the new silencer. I had not really payed any attention to this in the past with the old silencer, as it was ugly, with a black tip so you cant really tell if theres unburned oil and did not care about it being dirty. I prioritized the unburned oil over the restriction and tried to make my jetting more lean so that i would not be getting this residue coming from the exhaust. Though i never changed the main jet from what was in the kit, i did adjust the main jet needle position to make these changes. The more lean i went (moved the needle 3 times), the more the bike sounded like it was gonna blow up when i first went to start it (sounded like the bike was pinned WOT). No matter what setting, i was still getting this unburned oil out of the pipe. I then thought "well maybe i need to run richer from where i started since the old clogged silencer would reduct the flow of air, and therefore a new, unclogged pipe would need more gas to compensate for the greater flow." after going one click richer on the main jet needle from where i started, the bike was back performing as it should, confirming my thought (in "quotes") that it needed more fuel. The problem? i was still getting unburned oil out of the pipe! I attempted to just ignore this, but sure enough, the next time i went riding, i fouled another two plugs! At this point I suspected compression, but everything turned out to be ok there too. DOES ANYONE HAVE AN IDEA WHERE ALL THIS OIL COULD BE COMING FROM AND/ OR WHY IM FOULING SO MANY PLUGS?? -The whole reason im hesitant to still say its a jetting issue is because of the adjustments i did, in which none resulted in a clean burn; but cant think what else could cause this? -Could this maybe have something to do with the Float in the carb? i dont think this is likely either, as i replaced the float with an OEM one about 6 months ago because the carb kept pissing out of the overflow. has not been an issue since. -Is there a gasket that could be causing this leak of oil? more background: -I recently re did top end about 10 hours ago, currently getting 135PSI, so i dont think oil is getting by the ring. -initially i moved the main jet need leaner by three adjustments, and then found correct performance one adjustment richer. if your not familiar with the jetting kit, it comes with two different needles and instructions on which was to go for a leaner mix, and which way to go for a richer mix. The main jets that come in the kit are set for different altitudes, and therefore did not change out this jet. -as a refresher, the bike runs great except for fouling plugs. i do notice that when i first start the bike, it acts like its stuck in WOT and then calms itself down after a few seconds, i assumed this was because the carb fuel bowl is not full yet and was in turn running leaner? maybe im wrong and this is a sign of something else? same kinda thing happens when i turn off the fuel and let it run dry. In the past (prior to jetting adjustments), it would idle until the bowl was dry and then would act like it was it WOT at the very end since its just running on fumes, i always hit the kill switch once it started to scream. Now its like the throttle gets wider and wider as the remaining fuel is burned up, and then screams at the very end. - I sprayed carb cleaner around the carb while the bike was running to ensure there were no air leaks around where the carb mounts on the bike, as i was told an air leak there could be an issue, and if it was present, the bike shouldve rev'd up when there was carb cleaner present. The bike continued to idle fine, so thats not the issue. - Air filter is very clean and oiled. -I run amsoil Dominator 50:1 -The only other thing that ive done recently is try to waterproof the bike as much as possible, by sealing up the magneto casing so water cant get in, and routing the crankcase vent tube, as well as the carb vent tubes into the air box (with the exception of the overflow drain line, that remains routed down. I know there is no Cinderella slipper answer to these kinds of questions, but any advice or guidance on what to investigate next would be much appreciated, im out of ideas. ALL HELP IS GREATLY APPRECIATED! Cam
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