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Found 61 results

  1. Hey guys, Just came across all of these old school slide shows. They take awhile to record and upload to youtube. But I'm trying to get the good ones done first. Full of info and fun to watch. This one is all off road models cr500r cr250r cr125r cr80r cr60r as well as xr200 xr250 and xl600r. Also there is a test at the end of part 2 so make sure you study hahah. part 1 part 2 I'm about to do another from 84 street bikes going to be fun enjoy!
  2. Scheer

    2001 CR125 Rebuild

    Thought I would share my bike rebuild I did on my 2001 CR125. The bike was in a rough shape when I bought it. Here is the only pictures I have when I bought the bike. I didnt take before pictures. The picture does not do enough justice on how bad this bike was. Sorry about the quality it is the picture the guy send me and he had a filter on it. Got the bike back and started working on it right away. It would start only by bump starting and would not go into the powerband so I started to tear the bike down.(I did a compression test and it was at 60PSI cold) after i pulled the motor I found the cylinder to have a crack in the exhaust side and pits all down the cylinder. It had a Wiesco piston and crank. The pits down the cylinder, the walls were scored. The steering kept grabbing while turing so I tore apart the steering stem and found the shape of the bearings... Took the dremel and cut out the bearing it would not break loose due to being rusted bad. On the frame and swingarm I took the sand paper to and sanded it down from 600 grit to 800,1000,2000,3000 grit. Then on the pipe it is a pro circuit pipe that was black and I took a sandblaster to it then sanded it down. I used a torch on the seams to give it the blue tint. Have the bike completly tore down cases were not split this time the crank seemed fine no slop in it move freely figured it would be fine for awhile... front and rear shocks were rebuilt no shock oil was in either front or rear shocks, soaked the chain in gear oil for 2 weeks and let air dry for 2 days, cleaned up the case halves with wd-40 and a scotch brite pad. I wish I would of took before pictures of everything the cases were caked in cow manure and grass took a long time to get the stains out of the cases and swing arms. Was time to put the bike all back together piston and cylinder came got a oem cylinder and wiesco piston. I did not put in a new crank more to that later. Got the bike back together did not buy any plastics or look good things yet I planned within a month after the build to get all the plastics and graphics. I wanted to focus on all money going in to the bikes motor and more important things. Went to do a break in cycle on the bike ran great had no signs of anything going to fail started first kick, clutch worked great after I used it a bit but then was riding down a gravel road still during the break in cycle and the bike locked up on me that ended the break in cycle. Took it back and started to pull the motor and found that the crank locked up on me. Split the cases pulled the crank and decided to split the crank apart to see out of curiosity what it was and found the big end bearing to be shelled. The marks on the crank were from splitting the crank used a air hammer to split it. Ended up going with a OEM Crank and another Wiesco Piston. scored the piston bad with the chunks of the bearing, cylinder was fine no scoring. Big mistake not replacing the Crank after the crank locked up I looked up wiesco cranks and they say they do not last at all. Got new plastics, seat cover and graphics also and finished up the bike project. I spent plenty of time on the bike making it look good and cleaning it up. It was my first bike rebuild I ever have done.
  3. So, i just bought my cr125 a couple weeks ago, and the bolts that go from the side panels to the seat are stripped. Everytime i try to remove it with a socket wrench, it just gets off, even with force added. The top of the bolt is stripped. I've tried cresent wrenches to fix it, and they just don't fit. I want to be able to remove my seat so I can get to the air filter to clean it, so far not going so good. Let me know what i can do to get the stripped bolts off!
  4. nate9521

    Is this for real?

    http://latestmxvideos.com/index.php/2017/08/18/honda-2018-2-strokes-officially-announced/ ive seen this on a couple of websites but I feel like there would have been a lot more talk about this if it was for real
  5. dchety

    89 Cr 125 Help

    Hello Forum - My first time posting...I am installing a motor I purchased for a project I am working on and noticed coolant in the transmission oil. It this typically a water pump seal issue? Any one here have experience changing this part on a late 80's Cr 125? Any help/comments are greatly appreciated.
  6. haasguy96

    93 cr125 transmission problems

    I bought a 1993 cr125 with a heat seized piston and ended up with much more trouble than I anticipated. Top end is rebuilt, cylinder is all squared away. I took it for it's maiden voyage and found that I only had the first 3 gears. When I went to shift into 4th it felt like I was hitting something very solid with my shifter. The clutch plates are in spec but the springs are .050" long. Can anyone help me?
  7. I feel like ripping my hair out! I bought a 2005 cr125 years ago, brand new. From day one it was a fouled. Eventually I had it tuned kind of good. A couple of years ago someone stole my bike. Obviously I recovered it. My crank bearings were shot. So I split the cases and changed them and both seals. After assembling the bike it smoked and bogged like crazy. I thought I may have fudged up the right crank seal when I installed it...nope changed it and still smoked and bogged and fouled. It sat up for about a year and I just broke it out again. It doesn't smoke as bad. If I idle for about 10 seconds it'll blubber and shoot out smoke before fouling a plug. The strange part it that it rides pretty good on the pipe, but out of the blue with blubber and eventually die. Now After cleaning the spark plug and kicking it, it'll turn over for a sec and die. The spark looks weak so I check it with a new plug and it looks good (so I'm assuming it's not the ignition system) anyone else have this problem? I'm beginning to think this bike is a money pit...but on the same hand I feel like it's something small causing all of this. Oh and also it's dripping that black crap from the tailpipe and plugs are always wet. I went down a size on the pilot...didnt help.
  8. I recently bought a 1987 cr125. I've noticed after it has gotten cold outside, it hardly runs anymore. When you start it up, the engine revs to full throttle. I have tried everything I could think of and I can not get the revs to climb back down. I've went through the carb multiple times.
  9. Temetti

    CR 125 pinned.

    08 Cr 125 flying on a small Private track in Finland. Nice 2 stroke sound and a crash at the end.
  10. mcnally21

    Not enough gas?

    I have a rm125 and it has like 5 grand restoration done to it inside and out. I had just recently got it and it feels like the powerband hits really late or it is struggling to get fuel. If I replaced the main jet in the carb with a jet that would go in a 250 2 stroke would that fix the problem or does anyone else have any suggestions for me?
  11. 101 2-storke

    How should i jet my bike

    I have a 2003 cr125 and i want to set it up for winter/ice riding. But i dont know what to size jets to put in it for the colder weather. Any recommendations?
  12. My top end went on m 98 cr 125, the needle bearing clip came out and broke apart and shrapnel got everywhere and blew it up. I cleaned out the top end and washed out the crank with the bike upside down. the bike starts up great and seems to run fine but im getting a weird di-di-di-di-di-di-di noise coming from the motor. i tried adjust the power valve and tightening everything but the noise is still there. Here is a link to a video where you can hear the sound. It gets louder as rpm's get higher and at really low rpm barely idling it goes away. I am pretty new to bikes and 2 strokes so any help would be appreciated. https://youtu.be/msfU8WCXg8E
  13. I'm having problems with my 92 CR125. I've had the bike a few months now and it's been running great (within first month of having it transmission messed up, tore it apart, fixed trans and put all new bearings in entire bottom end, crank assembly felt good so re used it), not really too surprising because the previous owner obviously neglected the poor thing. Anyways, after the rebuild (all new bearings and seals along with a few new transmission components) the bike ran GREAT, TONS of power up top along with smooth power down low (125 so not neck snapping but it was properly smooth till it starts revving hard). Recently I started getting a bog down low when opening throttle quickly and diagnosed the cause being low compression (90 psi no matter how many kicks I give it, builds quickly to 90 but won't go higher, with throttle open/carb removed also. So I assumed it needed a new top end (same top end when I got it), so I put the wiseco kit in and unfortunately same psi readings, 90 psi, needless to say stuff went flying in the garage. Checked everything the manual said it could be like head/gasket, base gasket, reeds (replaced with brand new reeds), still 90 psi. Re-inspected cylinder bore and piston and they look flawless. I don't understand what else it could be, please help! Im still currently riding the bike every weekend with the low compression, runs amazing well but I can feel the low compression when doing slow wheelies, bike dies out. It doesn't sound like it has an air leak, idles perfect and fires right up too, we ride for hours straight on the weekends and it never even flinches, runs excellent besides the low end bog (due to low compression), thanks for any help guys. My manual did mention one last thing that could cause low compression and that's the crank seals, didn't know this could affect compression but the Honda CR125 factory manual says it can so I'm not sure what to do about that. Inspected left side crank seal (flywheel), zero wetness, I installed new crank seals 29 hours ago ( that's how many hours the engine has on it since I tore it apart).
  14. I have a 2005 cr125 new to me. I had millennium tech replate cylinder and supply new piston. I replaced crank bearings and now it won't hit power ban. It feels like a 4 stroke bouncing off rev limiter. It is also putting a lot of black spooge out of exhaust i mean a lot. The plug is black. I cleaned carb and adjusted floats. I also repacked silencer. I noticed the carb leaking gas out overflow the other day. I suspect it is running really rich. I have a brand new pwk from Jd jetting I'm going to try out. I also did a leakdown test and it held. I also am not 100% sure the power valve is set up right. The manual doesn't go into great detail about this. But it seems like there is only one way to put it back together. I have the engine out I'm going to do another leakdown test and double check my power valve and put it back together with this pwk. Any other thoughts out there?
  15. I got a great deal on a 1997 XR200 and have it running and idling great. Now that I have it running good, I want to fix some of the aesthetics. The front drum needs to be adjusted but I want to go to a disc brake anyways. I am looking at CR125 front ends and I know this has been covered pretty well on here. I came across this picture of a 1997 XR200 on some website called "Dirtbike Rider Pictures" but I couldn't comment to ask them what mods they have made. This picture is not mine and I take no credit for it. I am only posting it on here because I would like to make similar mods on my bike to look like their bike. Does anybody know what kind of front end is on this bike? What kind of rear end? It almost looks like a CR85 or CR125 front and an XR250 rear? Any suggestions on what this looks like would be appreciated. And if the original poster of this photo sees it, please let me know what mods you made to your 1997 XR. Thanks.
  16. I wanted to start this as a place to ask questions about the little things I can't figure out because I never saw the bike assembled?! My son had outgrown his XR100 and I managed to find what I hope turns out to be a terrific deal on a bike in a box... or rather several boxes. It is a 1998 CR125R which someone had started a rebuild on and walked away from. The guy I purchased from claimed that it was literally a barn find and that he bought is super cheap by scrounging around the barn collecting everything that looked like it cam from the bike. It had a new Hot Rods connecting rod and crank installed in the bottom end, but when they went to put on the right hand case, they cross threaded the bolt that holds on the primary drive gear to the clutch. They went ahead and tried to crank down the side cover with it like that and broke the side case. From there it looks like they just walked away. The cylinder was off and scored up pretty bad, a brand new piston was on it, but not ring, etc, etc, etc. I re-tapped the hole for the primary, picked up a case cover off ebay and resolved that issue. I had a new sleeve installed putting it back to the stock bore and have a new piston and rings in it. I drained and bled front and rear brakes, rebuild that front forks, greased or replaced all the bearings except for the head (which are smooth). It was missing all side covers and rad shrouds, but he can starting riding it without those until some come up on ebay. It was also missing the exhaust. I found one that somebody had as part of a CR500 into a CR125 aluminum frame project. I think it will work, but they'd hack off the rear mount on the expansion chamber cutting a couple of holes in it. I welded those shut, but still need to work on a rear hanger and a way to mount the muffler as the bracket and the frame mount don't line up? We started it for the first time yesterday to begin heat-cycling to seat the rings. Starts up first kick But pisses coolant out of the telltale and from around the head gasket I'm going to call the machine shop tomorrow to be sure that they decked the head AND the cylnder, if so I'll try a new head gasket. If that doesn't work then I'll attempt to lap them on granite or get the shop to redo them although won't be happy if I have to pull the cylinder again! I'm going to pull the water pump and check that I got the new seals in correctly and see if the shaft is damaged. Thanks for wading through all this. I appreciate any input and advice! Mark
  17. Hey I was wondering what was the best spark plug to run in a 2002 cr125 with a 134 big bore. It keeps fouling spark plugs. I currently have a br9es in it and thinking if I should just go one hotter or change it to a br8eg? Just let me know. Thanks
  18. Hi, I am 13 years old and I am trying to decide what bike I want to get (two stroke of course). I'm 5'2 - 5'3 tall, and I weigh 125lbs. I'm a beginner at this, meaning this is my first bike but, I have ridden a dirt bike a few times. My choices are the yz85, cr85, kx85, kx100, sx85, and the sx105 (Yamaha, Honda, Kawasaki, or Ktm). I am not interested in the rm because I just don't like it. It seems like a cheap crappy (sorry if I offended you) and it doesn't seem to have the speed and power that I want ( at least that's how people describe it to be). So please don't include it in. I am going to buy a used bike on Craigslist or somewhere because this is my first year and I'm not the richest of families (in case that helps.) Right now, I'm confused about which bike to get because they're all good brands. I want to be fast on the track (obviously) and I want to be aggressive. Which bike will fit that role? Can some also explain what top end and bottom end power is and what it helps with when you are listing a bike? Can you include the pro and con of it? I'm also not sure if an 85 is the right size for me, as I want to grow into a bike and have it last me. Maybe I should get a 125, if is so, which one (again, no Suzuki rm)? I'm going to a dealership to sit on some and try some (not too sure about trying some) Saturday but I just want thoughts about this. I don't know ANYONE with a dirt bike so the internet is my only friend here so I am really counting on you. My mom doesn't know anything about dirt bikes or the sport so I have to really look at this stuff myself. If you have any tips, please leave some as they will be helpful for me or any other onlookers in the same situation as I am in.
  19. does any one know why my cr125 keep flooding??
  20. Hi, I am part of a senior design group to round out a mechanical engineering degree. Our project is to design and build a generic motor mount for a shifter kart that uses 125cc 2-stroke dirt bike engines. one of the motors we would like to accommodate is the CR125. We are looking for measurements from the crank case for the width of the mounting brackets both for the frame and the swing arm. The two mounts we are using specifically are the swing arm mounts and the rear frame mount on the bottom of the crank case. We are having trouble finding a motor we can physically measure and are turning to forums to see if we can source this measurement data from people who own or are working on a bike with one of these engines! Any help is greatly appreciated!
  21. Hi there ! I'm currently looking for a used 125cc 2 strokes between 2000 and 2007. ME: I'm form Québec/Canada, I'm a 5.4 foot tall, i weight 130, i mostly ride trails(on dirt, sand, rocks) but i really like to jump, climb on some small rocks(a bit like trial) , and i do ride enduro style too. I CURRENTLY RIDE: an XR200a 1984 (with absorber) i really like that bike, it's undestructible and i can ride for ages with one tank. The downsides are the suspensions and the speed limit. I WANT: a light, 2stroke, 125cc, which i can use all around. I want to pay max 3000$cad. I did some research and found that the YZ 125 is a pretty notorious bike, and more notorious are the 2006+ because of the suspension, motor, weight, improvements. That being said, i'm not close for any other brand. The one thing i'm concerned with is the gas consumption. I can do 2, 3 rides with my XR(4stroke, of course) before it got bone dry. I don't ask for the same results but i just don't want it to run out after 1 1/2hr -2hrs ride. I would really like a bike i can easily find parts. During my reseach i fell on a steel vs ali frame thread, i'm also concerned about it. Being a Vintage dirtbike rider ATM i can say i love the way it feel. I tried my friend 2017 TE300 and it was great but it felt like the bike was SOOOOOO DAMN STIFF !! OMG, myself being small and light, i wasn't comfortable AT ALL on it. I don't think i could see a difference between a steel and an ali frame and i wonder if i could see a difference between 2002 Yz vs 2007 YZ's suspension too ?? HOW MUCH should i pay for a STOCK bike between 2000 and 2007 ?? (i know there can be that bike which as been redone and all, but just overall stock ) Anyway, i probably forget to write some lil thing but overall this is it, i'm looking for a 125, 2t !!! Thanks you very much for your time ! have a nice day
  22. Evan Dodd

    Cr 250 high rpm fluttering

    My 1989 cr 250 flutters at high rpm. It sounds like your holding it at the rev limiter when your just getting to the meat of the powerband like 4000-5000 rpm. Has new reeds, powervalves have been checked, carburetor rejetted and has new top end with 180 psi of compression. What could cause this?
  23. Will I Am

    2006 CR125 Stiff Clutch Pull

    So, I am about to embark on a major tear down of my 2006 CR125 and have one more "problem" that I need to resolve during this rebuild. My clutch is a pretty firm pull and it fatigues my forearm pretty quickly. I'm not sure if that's simply how it is on these bikes, having pulled the clutch lever on other bikes such as the yz125 and rm85, my clutch is very hard to pull in comparison. I just replaced the cable with one that the guy I purchased the bike from gave me, so maybe not stock? Would that make a difference? Also, could it be my springs? I've never had problems with the clutch such as lurching and the clutch is smooth, just hard to pull. Thanks, Will
  24. So I have an 07 cr 125 fouling plugs before the bike even has a chance to warm up, plugs come out wet and oily on the tip. had both crank seals replaced last season because my main drive side seal blew. While it was split I had a new crank put in, we noticed my cylinder plating was pooched so I sent my cylinder off to be re-plated, put a new piston in the shiny new looking cylinder put the old warped head back on and called it a day. then rode it all season having absolutely no idea about the warped head because I overlooked it when I was excited to put my bike back together and ride. Its now winter, snows on the ground. I recently went to go for a put and fouled a plug before I could get to the end of the street and back. I was also smelling coolant so checked the rad while running the bike, lots of movement and tiny bubbes. Pulled the head off and sure enough it was warped to the point where I could rock it back amd fourth on the mirror and see a small gap... so NOW after I replaced the head my problems persisted and I can still see little bubbles swirling around vigorously in the rad if I rev it with the cap off, I've had boiled it down to my cylinder probably being warped then I found a leaky hose by the exhaust that was dripping coolant onto the outside of the exhaust port. Which brings me to what I think may be an incredibly stupid question, could it just be the loose hose sucking in air that is causing my rad fluid to have small bubbles in it? And maybe im just experiencing increadibly rich jetting now that my head is actually sealed properly? over and out.
  25. No Coast Rider

    Sticking throttle on 02 CR125

    Hi all, long time lurker first time poster. Hoping someone can help me out with an issue on my beloved 02 CR125. I bought the bike last year as a total basket case and made a winter restoration project out of it. Got it looking and running pretty good. Bike has cylinder porting, V Force Reeds, Keihin PWK air striker carb w/JD kit, FMF Fatty and Turbine Core exhaust. Otherwise it's mechanically stock. I only ride MX with it. I put my first 20 hours on the bike after the overhaul pretty much without incident. Then one day I opened the carb to lean out my jetting, went to the local practice track and on my first lap on the first big tabletop the throttle stuck wide open in 3rd gear I crashed pretty hard shortly after landing and hurt my knee which cost me a month off the bike. I blamed it on a worn out throttle tube and the carb spring grommet not being properly aligned, so I replaced the throttle tube and fixed the spring. did another 13 hours on the bike and it ran fine, no more issues. Late July I put in a new piston and changed my jetting again to prepare for a race. Did a few practice laps and the bike worked fine. Then during my first Moto on the fourth lap I went off a ledge jump into some big braking bumps, throttle stuck again through the bumps and I went over the bars, me and the bike got pretty beat up, cost me another three weeks off the bike. When I went to pick up the bike it was still revving at full throttle. This time I replaced the throttle tube with one of those metal ones with the bearing at the end, new throttle cable, and a new carb return spring. Rode it around my yard and it worked fine. Went to my local practice track and once again, first lap, same tabletop as the first time, throttle sticks open, this time I was ready for it and pulled in the clutch. Brought the bike to a stop and it it kept revving off the limiter. I could move the throttle back and forth, but it had no effect on the revving. I opened the throttle all the way to the stop and let it go and it snapped shut and the bike went back to idle. I'm completely lost at this point as to what to do, I've ensured the throttle cable isn't getting pinched anywhere and have replaced everything I can think of. I even put my needle in a drill and spun it, looked straight enough to me. Guy at the dealer suggested an air leak somewhere in the crankcase, but every air leak I've seen makes the engine rev high at idle, but once under load it works relatively normal, just a little lean,this is full power open throttle. When the throttle isn't sticking the bike rips pretty hard, loads of fun. I have a new 17 CRF250R that I've been riding since I'm too scared to get back on my 125, but the 125 is a lot more fun to ride. My wife wants me to sell it, but I can't sell it to someone in this condition, don't want them to get hurt. Every time this has happened I was 3/4-full throttle going off a jump face in third gear, shortly after doing work involving the carburetor that's the only parallel I can draw between all three instances. When I overhauled the bike over the winter I completely rebuilt the carb and it worked fine, so I'm not clueless when it comes to carbs. Does anyone have any other ideas as to what I can change to fix this issue abs get my little ripper going again? Thanks.
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