Crf250r121

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Everything posted by Crf250r121

  1. Hey guys, So I just got a 07 YZ250F that is in desperate need of some jetting work. I have read throughout the forum that the 09 needle is a great cheap improvement over the stock needle but I am wondering how it does against a JD needle? I have a JD jetting kit in my YZ 250 2 stroke and it works awesome but I'm just making sure it really is worth the 80 dollars or so. Thanks!
  2. Not sure if this has already been posted but here's a link to the movie "On any sunday" http://veehd.com/video/2421585_On-Any-Sunday-1971
  3. First off, Let me Iterate that I do NOT want this to turn into a 2T vs 4T bashing thread so if that's your soul purpose in posting here than save it for someone who might care. So I just finished reading the Motorcycle USA review of the new 450F's and 250F's. Exciting times! Honda getting a new frame,EFI and kayaba suspension. Kawasaki also getting EFI and a host of other new improvements. Yamaha maybe not as drastically changed but still a contender in the market and the Suzuki finally getting the bugs sorted out and coming forward with a solid bike. Although the "Lites" bikes are maybe not as exciting in contrast to the 450's they have still all upped the ante. So motorcycle USA did something different and decided to include a section on the 09 YZ250 in this years 250F shootout. They praised its fun factor, low maintenance costs and its ability to start easy and carve a nice line. As well as the missed satisfaction that comes with shredding a berm to the sweet sound of a Reed inducted engine. But, While comparing the specs from the 250F's to the 250T I realized that, While weighing in the same as a 250F. It only makes 7 Peak HP more than the most powerful offerring from the 250F's. It also makes 6 less HP than the weakest offering from the 450F's while only weighing 9 lbs less ready to ride. I guess my question is........How did this happen???? When exactly did we allow the 450's to have so much more power. It's no wonder that no more 2 strokes are left in the professional ranks. At a 6HP deficit it's just not a viable option. But, Allowing the 250 2T's in the same class as the 250F's doesn't really seem to be solving anything either. It's just creating another unfair advantage. I love my 2 strokes, my 250 is a good do it all bike, It's easy to maintain, has more than enough power and the suspension and chassis are top notch. My 125 is a blast, again easy to maintain and too much fun to ride. But I also love the power delivery and overall smoothness of the 250F's so much that I am actually planning on buying another one. So why can't they find a way to make it fair? I think the 144 might have been a step in the right direction as the 125's themselves were only at a 2-3 HP disadvantage. I know that the 250F's make the power in a much more usable way but a good 125 rider can keep up with the 250F's. I was wondering if anyone could shed some insight as to why the 450's are that much more powerful? I know that a 4 strokes saving grace is displacement but remember that a 450 is 50cc's short of being double the displacement of a 250T. Has anyone reproduced numbers like this on a dyno? Does anyone have any solutions to this problem? I don't understand why everyone is so quick to jump on the bandwagon? I would rather see both 2T's and 4T's being a viable choice to the consumer. A mixed gate of 2T's and 4T's would be exciting. I don't know what its like everywhere else, But in ontario we have a kid on a 144 killing it in the Junior class against a whole bunch of 250F's but in the 450 class there are maybe 3 guys on 2T's left and you can tell that they are at a disadvantage.Why exactly is it like this?
  4. So I finally decided to try some of this "Magic" oil that everyone on this board has been raving about for myself and I figured I would give anyone thinking about purchasing some of it my perspective on it. I have not been swayed in anyway and am not receiving free or discounted oil from dave J for doing this. So, First off..... The bike is a 2007 YZ 250F, The suspension has been modified by factory connection for a 165# Junior rider or I guess that would be B class down in the states. The springs are all stock and this is the first time that I have taken the suspension apart. The seals were leaking so I decided that it was time to tear it all down and inspect everything. I already have new seals and bushings and will be putting them on in short order but for now i'm waiting on Dave J's oil. I called Dave on wednesday to order the oil, He was very pleasant and took the time to explain everything on the phone. It is also apparent that he seems to always take the time to explain everything out in detail on the board and has posted a very informative guide on dissasembling the rear shock. It's nice to see that he takes the time to make sure his customers are educated in the matter. He told me that he is a little backed up at the moment and that it will take a few days to get it out to me but that shipping is usually reasonably quick. It's also nice that he informed me that it will be a few days to get it out as he just as easily could have taken my information and made me wait. So I guess i'll just have to wait till the oil gets here before I post anything else. I will say that the price isn't to bad. It's about 80 dollars to do the whole bike which is pretty close to what it costs to use another premium high quality fork and shock oil and I doubt you will get the same level of customer service. I will post again when the oil gets here to further review this "Magic" oil.
  5. I'm stil trying to sort out this oil leak, I have replaced everything there yet it still leaks??? I'm talking about part number 18 on this microfiche, For the oil pump.I've replaced the hose,the dowel,the oring and the screw and it STILL leaks! I don't know what the problem is. I thought maybe that the case had worn in that spot but it looks good, there are no pits or grooves. Has anyone experienced this before?? http://www.powerpartsplus.com/pages/.../2/yamaha.aspx Thanks!
  6. I'm stil trying to sort out this oil leak, I have replaced everything there yet it still leaks??? I'm talking about part number 18 on this microfiche, For the oil pump.I've replaced the hose,the dowel,the oring and the screw and it STILL leaks! I don't know what the problem is. I thought maybe that the case had worn in that spot but it looks good, there are no pits or grooves. Has anyone experienced this before?? http://www.powerpartsplus.com/pages/parts/viewbybrand/2/yamaha.aspx Thanks!
  7. I put 320cc's of oil in the lower chamber on both sides, I have the clickers set to 9 out on compression and 11 out on rebound. I can't be 100% sure that the clover shim is isn't spinning without opening it up again but I'm pretty sure it was on properly when I installed it. I think i'll just wait until I can warm it up and ride it properly before I try and make any adjustments. If I remove the inner chamber to check where the clover shim is than I will have to re-bleed it again will I not?
  8. Dave, Is what I'm feeling normal for suspension that hasn't been fully warmed up. I guess I'm still a little worried that I made a mistake on assembly. It feels amazing through the small stuff, Stutter bumps and slightly whooped out trails but it's really rough on the few downhill braking bumps I have near my house.
  9. Alright guys, I thought I would give a little update on my long overdue review of dave's oil. So after receiving the oil and beginning to re-assemble everything I ran into 2 snags, I snapped the o-ring at the bottom of the compression assembly(The exact one dave warns against snapping) and I also snapped of the stem off of the IC Piston seal assembly while trying to install the clover shim that dave gave me to test. I was at first really worried about how hard it would be to get such a small KYB part but dave was right there with what i needed in around 6 business days for a whopping 2.92$. A lot better than a whole 300$ inner chamber assembly. So I finally got everything back together today,Charged my shock with 145 PSI of nitrogen, Got the other clover shim on and put the forks back together.Assembled the rest of my bike, Started it up and let it warm up a bit when i noticed a small dripping coming from below my skidplate. I took a closer look and noticed a small oil leak from one of the hoses running to the oil pan. It was only a small leak and I was really looking forward to trying out the new suspension so i went for a small 5 minute ride through the trails behind my house. The first thing that stuck out for me was how plush it was over soft stuff now, I mean really plush. You can sit down and still not feel anything. The second thing I noticed however, Was how much stiffer it was over the big stuff. The suspension also felt a little stiffer off the stand as well. I didn't even get a chance to re-check my sag or tire pressure. I just let it warm up and took off for a small ride. Dave says that you won't really notice anything until the suspension warms up a bit and it didn't get a chance to today so I guess the review will be put into further suspension until I can get the o-ring I need for the oil leak from my local yamaha dealer which will most likely be on monday. Well Thanks again for the patience, I will do a full review of everything on monday for those who are interested but until than I guess i'm just going to have to wait in anticipation for that my parts to come in.
  10. I hate asking this but could someone please post up a fiche or picture of how the compression cap assembly goes back in on a 06+ KYB Shock? I forget exactly what order the washers go in. I know I could mostly use common sense but I want to be sure.
  11. I hate asking this but could someone please post up a fiche or picture of how the compression cap assembly goes back in on a 06+ KYB Shock? I forget exactly what order the washers go in. I know I could mostly use common sense but I want to be sure.
  12. Well on paper, Dave's oil is supposed to last anywhere from 100 to 280 hours, Without the polymers and fillers in it there is nothing really to break down.
  13. The new leak jet injector is purely speculation at this point, Do you really want to be the one to release this unconfirmed information to the public?
  14. Just thought I would give a little bit of an update. Dave's oil arrived on monday, or 5 buisness days after I ordered it. I than immediately began to assemble the rear shock taking the time to ensure that no air remained within it. During the process however I broke the o-ring the the bottom part of the compression assembly. Dave is sending me a new one in the mail free of charge as this isn't a part you can get from your local Yamaha dealer. I'm still waiting on the tool to separate the inner chamber which I ordered off Ebay last week so it will be a few days before i get the forks together as well. Dave also sent me a new product he is testing called a "Clover" Mod for the forks. It is basically a clover shaped shim that sits over the compression ports at the top of the stem. This supposedly prevents cavitation or air bubbles being created while the piston moves up and down. I can see how this would work as my only knowledge of cavitation is that of navy submarines trying to prevent cavitation in order to stay silent and the shim sort of resembles that. Anyways this is my update on what I'm hoping is a very informative review and I hope to post more soon.
  15. Sure........I'll do my best to stay objective......... I don't like the name of they guy who puts the clutches in the red bikes so the honda's will handle terribly and make very little power. I once knew a guy who knew a guy who worked at a kawasaki dealership and his sister was really ugly so stay away from the green bikes as well. I heard that suzuki was doing some sort of business with china so therefore I assume that all the parts on the new RMZ's will be made there and come with a free trial account to the world of warcraft so if you don't mind yellow than its a good move. Apparently yamaha has been working on a direct injected 6 stroke that makes more power than a 4 stroke at 9 times the displacement. The AMA has yet to get back to them with a ruling. KTM still refuses to run a linkage or a conventional fender, I assume that they're engineers just aren't that good with angles. If your going to be spending money this season on a new bike than I would probably suggest a husky, Not because I believe they're superior but because I think I read somewhere they also come with a free BMW thrown in or something like that....................Hey, It's still better than transworlds!!
  16. I was just wondering whether or not it is normal for the slide to chatter and rattle a bit at idle......I think I read somewhere that it was but i'm wanting to make sure. Thanks!!
  17. The throttle slide
  18. Yet it is somehow OK to take engine oil this seriously........... I'm just trying to help anyone out there who is maybe on the fence about whether or not to jump for dave's special oil. I myself was on the fence and a review like this could be the impetus as to which side I wanted to be on. If dave really is on to something with his suspension oil and it helps my YZ-F than I think that he deserves some credit and I'll happily give it to him. I don't see him advertising in any magazines yet and there's no banner ad or pop up on thumpertalk but if it really is superior oil than why not let others know about it??? Not enough good business get the recognition they should and i'm starting to think maybe dave is one of them,But if it isn't than I would also like to help the common consumer and maybe save them a bit of money in these tough times........Anyone else remember roost boost??? I will say this......Dave sent me a PM to let me know that my oil shipped today and is also sending me a new product to test free of charge, So even if it does turn out to be just snake oil than hey.........At least he's a nice guy about it!
  19. So I am in the process of rebuilding my front forks and I came to the weird realization that the bushing that sits above the washer, what I believe is part #4 on this microfiche (http://www.powerpartsplus.com/pages/parts/viewbybrand/2/yamaha.aspx) is larger on the left fork than it is the right.......Is this the way it is supposed to be????? I can't really see why??? Has anyone come across this before?
  20. So I am in the process of rebuilding my front forks and I came to the weird realization that the bushing that sits above the washer, what I believe is part #4 on this microfiche (http://www.powerpartsplus.com/pages/.../2/yamaha.aspx) is larger on the left fork than it is the right.......Is this the way it is supposed to be????? I can't really see why??? Has anyone come across this before?
  21. I have a 2007 YZ 250F that has been giving me jetting grief from day one. I have the NHKR needle in it with a 48 pilot, 175 main and a 40 leak jet. The fuel screw is at almost 3 turns out in order for me to get it running right. The needle is on the 3rd clip from the top. The problem is that it has a hanging idle and the only way for me to get it normal is for me to run the idle really low and the fuelscrew almost all the way out. I don't think it's an exhaust leak as i have sealed the end and can't hear any air escaping if i turn it over by hand. It also pops a little on decel although its still only around 5-10 degree's celcius up here. I don't really know where to go from here, I'm going to try raising the needle and see if that helps but after that i'm at a loss. Has anyone else had this problem and can they give me any insight as to how to fix it? Thanks!
  22. If you had of read all the way through to the end you would have come to the embarrassing realization that I'm still waiting on the oil to come. I will give a full review when it arrives next week sometime. This is just an initial review of the price and level of service dave provides.
  23. Thanks for the help william, I'm not exactly sure what you mean by the vaccum release plate?? http://www.powerpartsplus.com/pages/parts/viewbybrand/2/yamaha.aspx Are you referring to part number 10?? If so i'll check it to make sure that it's in the right way. I greased the hot start when I got the bike and the 48 pilot is new and the 45 is spotless. It has a clean hole right through it, I thought the slide might be an issue as it sorta seems like the slide is literally hanging up for a bit and than settling down. I'll check that tonight. Thanks!
  24. So I have a 2007 YZ 250F that has been giving me a bit of grief from the beginning. I have been playing with the jetting for a while now and still can not get it sorted out. When I got the bike it had a 175 main, 45 pilot and 80 leak jet in it. I have wired the accelerator pump and put in a 40 leak jet which has really helped with bogging but it still has a lean pop and a hanging idle. I just put in a 48 pilot today with the hopes that it would clean everything up but it still does it. I have the stock needle in now on the 3rd clip but i have a 09 NHKR needle on backorder from my dealer. I'm at witts end and don't know where to go from here....... All these symptoms point to lean but a 48 is the biggest pilot I can get. The bike is pretty much stock and the conditions around here are around 10-20 degree's Celsius and I am below 1000'. Can anyone help point me in the right direction? Thanks!
  25. My jetting problem has yet to be sorted out but lets just say its less than perfect. No bike will be jetted properly 100% of the time unless you work at it. You can't just set and forget it. I was merely looking for an help as to whether the JD kit was worth it, Or whether I should just stick with OEM stuff. Does anyone know what yamaha did with the 09 needle? I have used JD jetting kits before and been happy with them but at the same time they're just jets and If I can get them cheaper OEM than it might be worth it. I have a weird hanging idle issue right now as it stands but I think that's more related to my fuel screw than anything else.