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Found 40 results

  1. Okay guys, first post on the forum, hope I can get some help. I have a 1998 ktm 250sx and the bike runs great, starts first kick, idles fine and is very responsive and hits the power band great, but when I'm wot in the power band it bogs, if I let off the throttle slightly it will hesitate for a moment and then make it's way into higher rpms. This only happens at wot but is very annoying. Any help would be great thanks! I have replaced the gaskets on both side cases, adjusted the carb and still have no luck
  2. New spark plug, new air filter. Went for a ride and all was good. Hadn't run it in a week and a half. Now it won't start. Getting spark. The plug is dry. Is it possible I over oiled the filter and it has somehow gummed up the carb/ float? Thanks
  3. Hi, i have a 2014 250sx and it as you can tell by the title it goes through plugs like no tomorrow. If you aren't already aware the 2014 ktm 250sx has been known for having the most horrible jetting from the factory, when i rode it with stock jetting i fouled a plug on every start up. Pretty frustrating but anyway i changed the jetting completely, i replaced the original needle (N1EI) with a N1EH, 38 pilot and 158 main jet, air screw 1.5 turns out. I also have a 40 pilot i tried but dropped back to the 38. I run 50:1 with rock oil and 91 unleaded. So i started with the clip on the 4th position and fouled the plug within 30 seconds, moved it to the second and still had a lot of oil covering the plug. Finally i moved it to the top position and it still had a small amount so i have the air screw all the way out and its still not perfect? This doesn't happen often but it will even let off a backfire when i rev it too much but once its completely hot it will run pretty good. I read on a previous thread that a person was running a 40 pilot, 158 main and the same needle (on the 3rd position) as me on the exact same bike and year and he said it ran perfect. (he was at the same altitude which is sea level) I will note most of the time it fouled a plug was between 1/4 and full throttle so i thought about maybe going leaner with the main jet? but in saying that if i start the bike cold and not rev it at all for a couple of minutes and shut the bike off i have a bit of oil built up on my plug. So i assume there is something else wrong a part from the jetting? If it is the jetting should i try a new needle or main jet? i could be wrong but its weird i have to have the clip on the top position, air screw all the way out and an extremely lean pilot and have the bike still running rich. was wondering could this have to do with my reeds? if there was a gap? I have considered a hotter spark plug but i dont think i should considering going from the BR8ECM to a 7 plug could be up to 70 degrees differint in temp and that wouldnt be good for the piston or cylinder. Not sure if this is relevent but it could help. I ride mostly at the track, im not super fast im more a c grade rider but i usually ride it on the pipe and when i do that it wont foul a plug but if i ever let it sit for a minute or even less sometimes it can still foul plugs when i rev it. ANY help is appreciated, i have read like 20 forums and still no solution. Thanks! Ash.
  4. Steinkrle Dog was given a factory 250sx and was able to race it in the 250 nat's? I think he'd hurt some teams feelings.
  5. Hi I recently bought a KTM 250sx 2005 and my bike leaks a lot of oil. I made a topic recently asking how to fix this and got amazing answers from everyone! And I asked this question on the other topic, yet to be answered, but I felt it was a different question wholly due to the paragraph it took to ask the question. And if it is answered there, this one can be deleted, but I wanted to know how do I tune the carburetor to run 50:1. It currently runs 32:1 and I believe the carb is tuned for that. I don't know jet specs but I will try to find out. I know you can adjust the jets via the air/fuel screw... I was told to turn it all the way lean and run the fuel, and I understand to adjust accordingly. But I just want to know what I must do to know if I should turn it richer or leaner based on what the bike does. What are the signs to tell to tune richer once I turn it all the way lean? And is there only one screw I must turn? or are there many? someone please explain all of this.
  6. Anyone switch from a 450 to a 2017 or newer TC250 or 250SX? I have a 08 CRF450 I like a lot but since the new Husky/KTM redesign in 2017 I have been thinking of making the switch back to 2 strokes. I am 37 with 2 kids and mainly ride at practice tracks and maybe one race a year...so I dont ride competitive but love ripping on tracks. So I was looking for some feedback/input from anyone who rode a new Husky/KTM.
  7. OK here goes... Picked up an 04 200 EXC few months back, needed some work to say the least, wont go into detail of all the things i've fixed on the bike just the current and most present issue I cant seem to fix... it is smoking IE blue smoke/lots of splooge to the point that at the end of a few hour's ride, it's out the tail pipe, running down the back and dripping onto the swing arm/rear break caliper and blue smoking quite a bit. When I first got it, it smoked more and smelled like shit. So first things first went to the carb, I live on the Oregon coast (elevation/temp reference) it's old dirty/stained but inside looks good, came with jetting pilot-45, main-178 needle: no idea what brand guessing stock in the 3rd clip, adjusted the float height due to it leaking gas when bike was upright no tilt with the gas on, Bought JD jet kit and running pilot-45, Main-185 and Needle is blue 3rd clip (JD's recommend specs for my bike @ my attitude). I have also replaced my Inner crankcase seal twice (First time I thought I messed up the O-ring so redid to make sure). I've rebuilt the top end/new piston (same thing) cleaned the PV, NOTE HERE that the PV has some issues, it seems to work fine but the screw that goes on top of the cylinder, down into the PV/flap would not come out preventing me from removing the flap to clean it, however it move's/ function's correctly, and has minimum clearance on both sides. One of the PV cover bolts that also works at the exhaust spring holder, was over torqued at some point (impact driver prob), or a result in a hard impact, the hole the bolt goes into is flailed/jared open a bit, not bad, not in the way of any function/ PV Gearing/hinge, it is not needed for that area to be air tight as their is also a breather that goes out of the PV so will not result in an "air leak" or loss in Top end PSI.... anyway... it's still smoking.... quite a bit.. now the bike itself rides fine I feel, the carb does puke gas when tilted over slightly/ hard to start (kick start) after flooded (like all bikes tho) I don't have any stalling/low idle issues outside of user error on clutch control. Honestly outside of it smoking as much as it does I would think nothing is wrong with it.. I have also tried raising the needle Clip to 2nd clip and it changed nothing at all, not even feel of the bike/response and have a new Spark plug I have yet to put on the bike. I have also "compromised" the crankcase Gasket (new one in the mail) while I was putting the Crankcase back on but that should do nothing with the exhaust just a little gear oil leak not relevant but throwing it out there. So I am at a loss... I've been toying with the idea of getting a Lectron carb... However... would hate to drop $400~$500 and the issue still persist, if it's a jetting/carb/float issue that would fix it and improve MPH/fuel consumption Or something with the PV? but I don't see the PV causing that much smoke/sploogee... I've ridden the bike normally/hard and nothing's happened but I don't want to keep pushing it and possibly clip the bike. Any ideas? "Oh help me 2 stroke community you're my only hope"
  8. Hey all, im shopping for my first two stroke. I’m a woods rider and I’ve found what looks like a great deal on an 250 sx. Changes in bike thus far are lower gearing on chain and softer spring on shock, bark busters and handlebar risers. I will certainly need an xc gas tank and probably work on forks. Anything else I can/should do to make this single track worthy?
  9. Hey guys/girls, I'm looking at buying a new KTM and don't want to spend the money without riding one first. I'm on the fence between the 250 and 300xc models. I race c class in local hare scrambles and will be racing my first GNCC (Camp Coker) in a few weeks (I'm pretty slow btw). I love casual trail riding as well. My current bike is an 09 200xc. My riding buddy has a 2020 300 husky and It is an absolute dream to ride, but at 170lbs wet I'm not sure I wouldn't be just as happy with a 250 and have less felt weight in the single tracks. I'm always looking for new people to ride with and would enjoy meeting up with someone at a local compound. We have a pretty awesome private 6mile loop in Sumter, SC also. Its tough to spend 10k on something without giving it a test ride... Hit me up if anyone's interested, KTM or not!!
  10. Purchased a 2018 250sx end of last season. Put 20 hours on the bike so far and was running 105mm race sag. I have fork height, air pressure, and clickers sorted out for the most part but was wondering what you prefer race sag wise and why? I ask because I live in canada and cant get out until end of march. I use to ride a 2006 yz250 and ran a higher sag to get a more stable consistent feel. I am leaning toward 108-110mm race sag on the 250sx to start at the beginning of the season to gain some stability and consistency. Dont get me wrong the bike is nowhere near bad just want to hear some good info on frame setup as KTM is pretty vague with what they recommend. side note: from what I have gathered slightly lower PSI in the fork and harder on the compression damping solves a lot of the vagueness in the small bumps and coming into corners. Also at my weight 157 lbs without gear many people say to run a much softer rear spring than what most companies recommend. Gonna recheck my race and static this weekend in the heat of the garage to see what I think about the stock shock spring rate. Would love to do everything I can before a revalve, this suspension is a pretty close second best to the Yamaha sss out of any bike ive ridden. Thanks!
  11. I have a 2003 ktm 250 sx that was fouling plugs but I've re jetted it and now its running good, I was just curious if there is a cheaper plug I can run in it. Right now I'm using the BR8ECM 3035 and its 25$ a plug is there a spark plug out there that is cheaper but will run okay in my bike? Thanks anything will help!
  12. I have a 2015 ktm 250sx with pro circuit exhaust with the r304 silencer. I'm looking for a new exhaust system that is best for desert, track, and mostly just freeriding. Let me know what you think is best.
  13. I need a new seat for my bike, the current one is ugly imo, and I looked around a lot for a seat, but I can't quite find one that fits... Anywhere I can look. I tried a LOT of motorcycle sites to find one but all of them only show seat accessories...
  14. Hey guys I was wondering if you could tell me if this stator looks okay and is right. It’s off a 2010 KTM 250 XC. I just pulled it off the other day to grease up the e-starting gears, and I don’t know much about the ignition system so could someone tells me if this stator is supposed to look like this? I’ve since cleaned up all the black crude. Thanks
  15. I'm and intermediate rider who rides very aggressively and on hard, but fast-paced woods/cross-country/harescramble riding. Sometimes I'll do technical, really tight trails, log crossings, and hillclimbs, etc. and I also will ride motocross tracks every once in a while. I currently own a 2008 KTM 250 XC-F with a bigger rear sprocket, FMF exhaust, aftermarket piston, and I typically run high octane fuel. I won't be upgrading for quite a while but I am planning ahead trying to decide what to save up for and all that. I'm sure this forum will also help others in similar situations. I'd like something that can top out faster than my bike but something that can accelerate quickly and have more torque as well. The majority of my riding is very fast-paced woods with hard corners and lots of roots and steep hills as well, so I'd like something that can blow through corners and accelerate quickly. But, I also ride a lot of tight technical trails so I'd like something that's torquey and has explosive, yet controllable power and something I can take over big logs and rocks. I'm fine with a bike that likes to be revved a lot as that's what I do on my 250xcf now. I'm used to four strokes although I'll probably adjust to a two stroke very quickly as I ride constantly. I'm leaning towards a 250 XC or a 350 XC-F although I've heard lots about KTM's 125 and 150 2 strokes, the 450 and 500, the wide ratio "w" models of the cross country bikes, and their respective motocross models just because I know how explosive they are. I understand that this is a lot to ask out of one bike but I'm going to be adding a lot of aftermarket parts to whatever I end up getting if it doesn't already have any. Tell me all about these bikes if any of you guys have ridden them! I'm probably going KTM because I've heard nothing but good things about them but I will still consider any other brands as well. Tell me any aftermarket you had to do, improvements to be done or downfalls of each bike, and all their advantages and things they're better at than the other ones if you've ridden more than one of these. This is more of a harescramble/cross-country racing post, but since some of my races have parts of motocross tracks I'd like to hear how they do on the track. Also, money isn't too huge of a concern with me but I will definitely not be able to get a brand new bike. I will be racing so if it's bigger than a 250 then I'll have to be sure that it can compete with bigger bikes. Thanks, in advance!
  16. 2010 KTM 250sx with newly plated cylinder, new piston, stock head. I am at sea level and I am not trying to mess with different compression by using different gaskets. I'm doing a top end rebuild and the Pro-X gasket kit I ordered came with 3 gaskets of varying thicknesses. Which one(s) should I use? I measured with digital calipers. Thin Green: .03 Black: .04 Thick Green: .08 Thanks for saving me yet again.
  17. Right now I have a 2004 ktm 125sx, here’s a little background of it, it has a ported head, Barnett clutch, and a 6 gear added, the 04s came with 5 speeds and it didn’t cost too much to add the sixth so I did! The question I’m asking is should I get a ktm 250sx I’m tired of over reving it and all I do is trails and hill climbs I weigh 130 and 5,8 kind of worried the 250 will be too much weight for me but want someone’s opinion on this, parents are not too amused with the idea of getting a bigger bike but I think it would just make my life easier with the torque! Should I keep the 125 for longer or get the 250?
  18. Today I decided to properly gap my spark plug on my 2003 KTM250SX and I started it up after gapping the plug 0.60mm like what my manual said. I started the bike after and it was running really well and clean ( I was happy) I was reving it slightly to warm it up and then the bike bogged and died like the plug was fowled ( I just rejected the carb and it was running really good) I took out the plug again and it looked normal from what I can tell so I put it back in and the bike will not start. ANYTHING WILL HELP Thanks Bike has been known to foul plugs but not recently with new top end. Bike Also has brand new top end with 2 hours on it roughly. Mixing ratio is 40:1 Plug is Br8ecm
  19. Okay so I just bought an 09 125sx for trail riding and want to add a larger tank. Unfortunately an over sized tank is anywhere from 230 - 300$. So I thought about buying a used one off ebay, does anyone know if 200/250/300 exc fuel tanks are compatible from the same year or what other years are compatible with it?
  20. I have factory connection forks and the bike’s previous owner was 40 or more pounds heavier and round motocross. My goal is to get into C class hare scrambles by fall but if not next year of course. I weigh 155. Not to familiar with suspension but i can work on my bike. I had called factory connection and to have the bike revalved it was gonna run me 1200. I definitely feel like i can figure it out with some advice and tips. Then i'll know how to do it on my bike and friends bikes when needed. I appreciate the help guys.
  21. I have a 2010 KTM 250sx that was running well before the rebuild. I just completed a top end rebuild and have it all together. When I turn the fuel petcock on it immediately pours out of the carb as though it is just a hose from the fuel tank leaking onto the ground. It is not a leak, it is from the hose lowest on the carb. The carb was cleaned not too long ago and has not been touched since I had it running. What could be causing this problem? Thanks in advance for the help.
  22. I did it. Finally quit beating around the bush and decided to go for it. Now the proud owner of a bran-USED 2014 KTM 350 XC-F. Bought it today, only had the chance to ride it down the road and back and I think I’m in for a treat. Previously had a 250 XC that I bought used November of 2016. Kept buying parts and constantly working on it to get it where I want it, but with out any luck so I decided to go back on the four stroke route. Anyone have any recommendations for aftermarket on it? It already has a lot including a skid plate, boyesen super cooler water pump, hand guards, rear brake rotor guard, radiator braces, mouse bibs in the tires, brand new Dunlop MX 3 S tires, radiator fan, shorai lithium battery, side grab bar, and ktm silicone hoses.
  23. Hey everyone Just picked up a 2013 KTM 250SX and it’s doing something fairly strange. I live in NH and it’s obviously very cold right now so when I first got the bike it was surging at idle/ running lean due to it being adjusted for summer. I fixed that issue with the air screw so it’s running just about right at idle, but when I blip the throttle it does some weird surge. The best way I can explain it is the RPM’s jump high from the throttle blip, then do a spaced out “ping, ping, ping, ping” all the way back down to idle speed. I’ve owned many two strokes and have never heard this, they always have a constant rise and fall of RPM’s, not this annoying ping. I’ve played with the air screw for an hour now and no cigar. Trying to ice race the bike soon so any help would be appreciated.
  24. Hi I have a KTM 250SX and its a nice bike, a 2005. The problem I have is it feels kinda slow compared to other bikes, like my friends 4 stroke 250s. I don't know the exact speed of it. It is definitely a fast bike for what it is, but there is a "spare" tire with a large sprocket on it. Maybe the bike feels slower because of that, and I don't have much experience with sprockets and gearing in that way. That might be the problem. I don't know the exact difference in sprocket teeth between the two sprockets, but I never had the normal sprocket on. It pretty large in comparison to the other, from what I know. I didn't know sprockets would make a significant difference in speed. Is this why?
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