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Found 210 results

  1. Has anyone tried using Athena power valves in an OEM cylinder? Everywhere it states "for Athena cylinder only", yet on Amazon, it states that they're good for both OEM and Athena applications. I've seen both (not side by side, unfortunately), and they looked pretty similar. Didn't take measurements, although I should've. I have read of people trying this but not actually running it. Just was wondering if anyone has experience with this. Thanks in advance!
  2. First new topic! Any one ride a 125 or 200 for woods/trails and want to discuss pros and cons?
  3. So I am 16 about 155 pounds and want a new bike. my first bike was an 06 crf230f bought it last summer wanted more power within 2 weeks, didn't have money at the time so I just kept riding it. want to go 2 stroke so I can work on my own bike more and just because they r more fun, I have ridden a 250 2 stroke before but it was 93 yz250 and didn't feel all that crazy. Btw I have about 3000-3500 to spend what bike would I be best off with
  4. Hi guys, Picked up a 2000 YZ 125 in pretty good condition, but wanted to look into swapping out the Athena Factory kit on there with a OEM cylinder and head. I know the Athena kit uses their own power valves so I'll need to source the OEM ones, but all the other hardware is the same. Do power valves wear out, or am I safe buying a lightly used set on ebay for this part? The cylinder and head I'll be buying brand new. Thanks in advance guys. Edit: My goal is to basically restore this bike back to nearly new condition. I’m willing to spend some money, possibly more than it’s worth to some. Ultimately I wanted a rock solid green sticker 125 to thrash on all year so bear with me. Small airbox leak by previous owner let dirt into the boot so I’m doing a flush at the bare minimum. I have not even started the bike since I purchased and did my internal inspection. Splitting cases soon down the line to check and replace bearings and seals.
  5. Basically I have a 2001 ttr125 and the side panels are all scratched up. I need a decal set to go over them so it looks good. The only problem is I cannot find a set of decals for the white side panels of a ttr125 anywhere. I need your guys help, can you help me find some decals or stickers to put over them? I can post pictures tomorrow. Any ideas would help a lot!
  6. So my life and 125cc dirt bike that's been having problems I finally got it fixed but it was leaking oil from the head gasket so I decided to drain all the oil so I can in preparation take the head gasket off and I noticed that there was a lot of oil in there but I did sleep the same that is very low on oil and too much oil in the engine be causing it to leak oil from the head gasket and from the stator or am I wrong
  7. Having problems with Yamaha yz 125. Have an aftermarket keihin pj carb and bike cuts out and high rpms and fouls plugs easy. Replaced the main hex jet by a lot of sizes down and still does the same thing. Bike will start (not easy) and bog out and die after 5 mins of riding and won't start up unless you kick it over at least 30 times. Any idea what the problem could be? Thanks guys.
  8. im am 13, 100 pounds (with gear) and currently ride a 08 yz85 and am looking to move up. first off im not rich and i have to pay for my own stuff, i am not going to be racing i mainly just ride track and trails here and there also some desert sinlge track. i am debating on witch i should get next a yz125 or a yz250f. i can handle the power i have riddden both a 125 2 stroke and a 250f and i basically fell in love with both so i am in a predicament on what whould be best. anything helps
  9. I just got back from a weekend of riding and noticed my fork seal leak got really bad and is dripping oil. I am going to replace it but for now is it bad to ride on bad fork seals? For when i replace them how much can i expect to spend on supplies if I do it myself, and how much will a shop charge me
  10. Hey guys, I just sold my yz80, for $1100. Im down to two choices for a new dirt bike to buy, a 2003 cr125r, or a 2007 rm85 big wheel. I sold my 80 because i outgrew it, and im ready for a faster bike. Im only 5'3, so I know i wont be able to touch both feet on the 125, its got a freestyle seat, so it sits a little lower. Then, the rm85 is a big wheel, but i already outgrew my 80, and i dont know if the rm85 will be much faster. I rode my 80 amazing, i ride enduro/trail and I go to mx tracks to practice often. Let me know on what bike you guys think i should get. (By the way, my brother has a cr125 as well, and ive rode it and control the power well.)
  11. Hi I’m 15 and I’m from Ireland. I can’t decide what bike to buy. I have no experience on dirt bikes(only small road bikes). I have been riding quads with about 10 years and I’m looking for a change. I can’t decide what to get a yz 125 or 85 since I’m only 5 4 and 55 kg. I have a lot of experience on quads so I’m not afraid of speed and power but I really don’t know much about bikes. Any advice would be appreciated .
  12. My speedo stopped working last week so i put a new battery in it, worked fine for 1 day, now its throwing code “50-1.7”. Not sure if it is related but i cant find anything about it online. Any ideas??
  13. hey guys. i have an 03 rm 125 with jetting issues. i've jetted it multiple times. currently has all stock jetting (460 main,40 pilot, 3 down on clip) and i'm running amsoil dominator full synthetic premix. was running castor 927 but fouled a $30 plug which i'm not very happy about. anyways.. does my plug look alright? should i run a $30 plug in it? i'm not trying to get it too lean, and i'm not trying to foul plugs. 440 (next size down) is too lean. not sure what to do. this is how my plugs are looking right now. there not too wet, just pretty dark
  14. Hi all i have a 2016 ktm 125 sx with 3 hours on and it has n weird bogging issue. It runs great with lots of power until i dont ride on the pipe for about a minute, then i have to clear it up again. Or it would just platter until it cleans itself. please guys any advice would help, this is driving me crazie.
  15. Well, I sold my last cr250 back in 2011 or so, and I decided its time to get back into riding... My last one was a 96', loved it, but I had ALWAYS wanted a gen 3 cr250... So I picked this 02 cr250 up! Came with a TON of spare parts. Heres some pics & vids. sorry if I ride like a rookie, its my first time being on a bike in years. Relearning how to ride again has been a lot of fun!
  16. Hey fellas, first post on here. Just picked up a 1996 kx 125 last night, I took it on a trade for something I paid only 125 bucks for. So I couldn't turn it down. It is seized, so it is going to need a bottom end, jug looks to be okay, i mean it had has full fmf exhaust, renthal sprockets that are in great shape, boyeson reeds (unsure of condition of those) and it also came with a quick lift stand, so i didn't think I could go wrong. I have Been researching on this bike for awhile and I cannot find parts for it. Hardly any jugs, cases, and I can even find a new crankshaft, or a big bore kit. They have them for almost every year kx 125 besides the 96 and 01. I guess the biggest thing im wondering if any of these years of kx parts are interchangeable. im planning a total tear down (most of it is already) so I want to replace everything new. And if I cant get a new crank, I would like to purchase a couple to rebuild to have on hand. If someone could shed some light on this or give me any additional information I would really appreciate it!!! Ill be posting pictures and going to try keep everyone updated! I really appreciate you reading this! thank you
  17. I looked around the forum and couldn't find anything on this. I'm buying another 125 or 250 2 stroke project bike but this time I might buy one in boxes instead of still mostly put together. i was wondering what/how I should check if all or most of the parts are there, should I just dig around the boxes and go through a check list? The other thing was should I expect to pay a bit less for it as there's a possibility parts are missing? Thanks!
  18. Hello, My name is Dan. I recently bought a 2001 yz125. I have been having jetting issues that i cant seem to fix. I have rebuilt the carb, tried a JD Jetting kit, and new reeds and nothing is working. I am looking for someone in the Central Jersey area who is willing to help me work on my bike and get it running strong. I have all tools necessary. I would pay $25 dollars per hour. This is completely legitimate. Feel free to text me at 908-448-9639. Located in Central New Jersey
  19. Mark Woodby

    Proper idle

    How do I know my dirtbike is idling at the proper RPMs?
  20. From the album: Attemptmischief

    Love it kick star fast and smooth
  21. Hey guys, I just have a quick question about getting replacement plastic for a 2005 yz 125 that has the polisport restyle kit on it. Recently broke my wrist during a ride and messed up my front fender and one of the radiator shrouds. Looking to get replacements for em. I know you can buy polisport for the newer yz125's but my question is what year is the same as the polisport restyle, if they are the same at all. I think 2015+ is all the same but just making sure before i make the purchase. Let me know what I can buy.
  22. So my little 125 Chinese Lifan motor pitbike recently started bogging for seemingly no reason when I give it full throttle. After playing with the carb I took it off and put it on another 125 and it worked fine, same with my spark plug, so I'm guessing that's not the issue. I then took the air filter off and the bogging problem went away. The bike was running pretty good, although a little rich with some backfire, but it never bogged until just recently. Hasn't been trashed, only ridden on a few pretty easy dirt tracks. Any thoughts on what it could be? I've yet to check my valves properly as I don't have small enough feeler gauges on me at the moment, but will get around to that soon.
  23. Hi, guys so I did a complete rebuild on my cr 125, 2002 and after approximately one hour of running it blew up due to detonation. I just wanted to know your thoughts on why this actually happened. The cylinder had already a cast iron sleeve so I just decided to overbore it to accommodate a 55.5mm piston, had cylinder head re surfaced so that previous detonation marks would disappear maintaining the stock compression. Now I think the issue occured when I ordered the new piston the head gasket included was too small in the sense that there is almost a 2mm difference between it's diameter and the cavity in the cylinder head. Any help would be appreciated cheers. I'll leave some photos below.
  24. So I'm picking this up in the morning.... previous owner doesn't know much about it because he called it a "CBR125" but obviously that's incorrect. I've ridden Yamaha my whole life so I know nothing about it, and was curious if the kind folks at TT could help me out with some info on it. Thanks!
  25. So I've got a 1993 husky wxc250 2t , but that doesn't matter too much I just need a starting point on something that went wrong. I was about ten minutes into my ride when this happened - I was about halfway through third gear, not an excessive rpm, and I heard a very aggressive noise from the motor, I pulled in the clutch and coasted to a stop (the motor had died). I was almost positive I had blown the motor and it was going to be seized. But when I pushed the kick starter down everything was fine. I pushed it back home, pulled the plug, turned it over, turned it through all the gears and nothing felt wrong. So I figured I would just start it up and give it a shot. I started it up and it sounded fine on idle, but as soon as a gave it any throttle a very loud "clanking" noise came from the top end. Almost comparable to a rod knock, but I can tell it is coming from the top end. My best guess would be something in the power valves, I am experienced with working on motors but power valves are new to me. What do you guys think it is? I'm just looking for I tip before I tear into it. Thanks in advance - Devin
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