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Found 41 results

  1. ttr125 works fine when running but to get it started I have to lay it on its right side for about 5 seconds. It will not start otherwise no matter how long I kick it and its been like that ever since I got it last fall. I got the carb professionaly cleaned and the oil changed but it still dosent start unless I sit there untill the daylight is gone or I lay it on its right side and it starts up like a charm.
  2. skiwithnoskis

    Carb tuning HELP!!!!

    Back story. Just finished complete rebuild new head, valves, crank, bearings seals, and muffler bearing. I've checked, double checked ,and checked again timing. Exhaust valves are .011 and the intake are. .007 (I know a frog hair loose). It will fire right up when towed and it will stay running. So I am assuming ( I know) the carb probably needs some help. Can you guys point me in the right direction as I am baffled by carburetor theory and function. By the way happy Mother's Day to any that are reading brad
  3. Hey guys! Im gonna start out with posting all the information i think is needed for you guys to help me with this problem! Stock engine 2007 crf250r. Valve clearances are good and have JUST been shimmed with a double and triple check. Jetting is 175 main, stock needle position, 45 pilot and 50 leak jet. 1000ft above sea level. Im still having a terrible time starting and it used to be a 1 kick bike. I haven't changed my kick routine at all. 3 slow kicks, 3 throttle twist and then kick. Will sometimes start if i give it some gas when kicking. And then it starts 1-4 kicks after its warm. Im lost and dont know what else to look for. Thanks!
  4. 2007 KX250F w/ 269cc big bore Recently bought this bike and had a mechanic tune it up. Valve adjustment and some other basic stuff. He said the it was in great shape. It’s been riding like a dream, I’ve probably put about 10 hrs on it. Yesterday before a short ride I topped off the oil and started towards the trail head it’s rode about 3 miles and was cruising in 5th gear and suddenly lost power. Throttle was very boggy, almost unresponsive. Then the bike stalled. I took a look no and leaks or anything but then bike wouldn’t start from kicking or bump starting after that. Loaded it into the truck and got home and realized there was too much oil in it. So I drained it out and put the right amount of oil in and it still won’t start. Please help.
  5. 2007 YZ450F which apparently had the float bowl needle stuck open, filling up the crankcase with fuel. My buddy rode the bike for less than 2 min. not knowing the crankcase was full. The bike died. It will not restart after draining the oil and refilling to the proper level. Some background on me just so you know I'm not a total newbie. I'm the father of a retired Pro Motocross/Supercross kid. I've been wrenching on bikes every eve. for a lot of years. I built all of my sons bikes until we started receiving them directly from Star Racing/ Factory Yamaha. I've not previously experienced this? The bike has good spark, good compression, I even tried starting fluid to rule out fuel delivery problem. I tore the motor down thinking bent rod? Rod looks completely straight. I poured solvent into both the intake and exhaust ports of the head - no leakage through the valves and valve stems do not appear to be bent? To me it seems and feels like a timing issue however nothing appears to be off, timing looks to be dead on? Something happened as a result of the crankcase being too full, but what? As I said, I tore the motor down, removing the entire top end. I inspected the connecting rod, it looks normal. I rotated the crankshaft which rotated smoothly? After not seeing anything on the bottom end I decided to reassemble with a new piston, rings, wrist pin and timing chain. Buttoned it all back up last night and still nothing, barely a pop every now and then? Anyone experience this before? What went aria?
  6. I have a JAILING 2005 125cc Chinese dirt bike I cleaned the carb After it was sitting for 3 years not being ran. I changed the oil fuel lines flushed out the fuel tank with fuel. Fixed ignition being wired in reverse new spark plug and everything. I bike kicks over and starts for about 2 seconds and then dies any suggestions and what u should try? Link to video of Ike trying to start -
  7. I have a 98 cr125r, i have done a lot to it. rebuilt the carb, new top end. It still wont start unless i prime the cylinder. Once it starts it runs good but also wont idle. my friend said it might be the jet or reed valves. what do you think
  8. Brandon Trumbla

    1998 YZ250 Hard to Kick, Wont Start

    Hey guys, I bought a 1998 yz250 that needed a top end rebuild. When checking the bike out the top end was already off, piston still on the rod. It turns over freely. I pressed the kick lever down and the piston obviously goes up and down. Basically the bike was a $700 buy that needed a top end. no big deal. new excel rims and dunlop tires, had everything to rebuild the top end already, new renthal bars, grips, etc. plastics worn out but no big deal. well worth the $700 in my book. So here's where my problem lies, after putting the top end back together, i'm finding it super difficult to kick. before i put the head cap on, the piston moved up and down smoothly in the cylinder as i pushed down on the kick lever. as soon as i put the cap on and the spark plug in, it became almost impossible to kick. I stand on my dirt bike stand to give me leverage on the kick lever and put all 200lbs of myself on to the kicker and i've gotta give it a little bounce to get it to kick. When it does drop all i hear is the piston stop at the top of the cylinder like its got all the air compressed. I'll reset the kicker and drop down on it and it'll kinda drop or get hung up like the piston doesn't want to suck back down and when the piston finally gets low enough in the cylinder i can hear a thump of air out the carb. I tried kicking this thing for a half hour with the piston getting hung up because of the compression not wanting to let it go. At least thats what i think is going on. and when i get the piston to clear the intake, it finally releases the trapped air. As far as spark goes, i've got a ngk 8es or something like that. not sure off hand. I do know its not the R plug. spark was there, wasn't the strongest spark but not the weakest either. Any idea on what could be going on? I think my next step is to take the plug out and see how easy it'll kick with out the plug in it. Any ideas would be appreciated, thanks.
  9. Michael Campos

    DRZ Carb issue?

    Hey all, Any help is very much appreciated. I have a DRZ400SM and was experiencing a few flat spots on the highway, meaning that when I hit 40mph the bike just lagged and then returned to normal at 45mph, happened again between 60-65 and 70-75mph. After doing some research on the the web I thought it might be a dirty carb. I watched a few tutorials and took the carb out. It was clean from what I could see, so I put everything back together. After getting the bike put back together it wouldn't start. Finally when I put it the petcock on Prime it started up, but when it started it was revving pretty high. I thought the revving was because I needed to adjust the throttle cable. So I adjusted the cable and started it again. After starting and sounded right it stalled. I figured it stalled because it was cold or there was only a little fuel in the system. I left it for a couple days and started it again. Everything seemed fine for the first couple blocks to the gas station, but then I noticed the bike wanted to stall. As I rode back home the bike struggled to make it and was back firing like crazy. Once home I noticed that the couple days I left the bike sit, it was in the Prime position. Ok, a few questions: I'm questioning whether I put the carb back in properly, thats why it didnt start initially. How can I check? It does start, but only in Prime. Wont start in On or Reserve position. Did leaving it Prime flood the carb? Why is it back-firing so much? I know these might be big broad questions, but ANY help is greatly appreciated! Thanks!!!
  10. Jay20705

    Xr100r 1999 ish wont start

    I have an old rusty xr100r 1999'ish and it will not start we got a brand new carb for it and air filter it has spark when i try to start it makes a kind of gurgle like a *Blurp* *Blurp* *Blurp* and smoke comes out of the exhaust it has no compression either im very new to dirt bikes and need help. Oh and also when kicking gas almost spits from carb into air filter.
  11. I need some help figuring out what is going on with my bike. I have an 04 WR450F, and I was riding 5 miles of hell over the weekend. Right before the last escape route (lucky me) my bike just died. I was starting up a climb, and right at the base, it just shut down. I didn't hit anything, don't even think there was much of a bump or anything to jolt the bike. I did have a few lay downs/get offs before, but nothing here. The light on the power button wouldn't turn on, and there was no power to the headlight. I found out that I could kick start it, but it was very difficult, it took a LOT of kicking before it would start, and then it would stall if I ever let off the gas. As I was trying to figure out what was going on, I saw some white plastic (?) pieces falling out from under the headlight/front number plate. I pulled off the headlight and saw an electrical part (I assume it's like a resistor or something like that), it looked like it had been jarred loose, and got pinched by the steering, and broke it. It is a white rectangular piece, looks and feels sort of like hard plastic, about 2" long, 3/4" wide and probably only about 1/4" thick, and has 2 male quick connectors on it. Inside (since it broke, I could see, usually you wouldn't, but maybe it will help figure out what it is), is a thin wire coil, like a spring, and I'm not sure what it is wrapped around, maybe just an insulator. I tried to wrap it with some electrical tape to insulate it while riding back, but it melted the tape, and was smoking. I'm not sure where the 2 wires that connect to it go, they go back into a cluster of wires on the wiring harness, and I didn't have time to cut it all apart, and follow them, but that is the only damage that I could see, so I'm hoping that if I can figure out what this part is, and find a replacement, that will fix my problem. Any help or advice is greatly appreciated. Thanks,
  12. Hey guys i have an 08 450 YZF quad & got a problem with ignition. new battery & was riding for a couple of hrs when me son took it for a ride & he stalled it & the bike wouldn't start again. theres no power at all. have checked the battery , the fuses etc but i just not sure what else to look for. Any ideas.... CHEERS
  13. Good Morning TT experts: I am hoping that someone has come across a similar issue and might have an idea; we were set to leave for a fun filed weekend and might be one bike down; It is a bike i just bought for my new to biking kid. I bought a used Cr 125 from a kid about 3 months ago. At the time it ran good, took it around a MX track for about five laps, and it was good to go. Fast forward to last weekend, son took it to the desert and it was bogging when getting on the throttle. It then got harder to start throughout the day; the thing would fire first kick the week before. I figure it was a carb or jet issue, so i took the carb off and cleaned out everything. This is not my first carb clean/ rebuild so I was pretty confident that was what it was. So when i got the JD Jetting Keihin( looks brand new) apart, the pilot looked a little plugged. I blew it out with compressed air and then hit it with carb clean along with the other jets and holes. Put it all back together and now she wont start. Checked the plug and it is a little black so switched it, then checked and it has spark( had a kill switch issue in the past). Re-pulled everything out, checked that I put things back together properly, and still nothing. The float looks to be correct, the reeds are newer vforce and look with a flashlight to be ok. Fuel is about 3 weeks old, and its the same that has always been run in it. Compressing feels normal though i did not put a tester on it. I even hit it with a little straight gas mist from a spray bottle to see if that would help. So I'm stumped, any ideas? thanks
  14. Hi guys, I recently bought a second hand husky txc 250. I did a couple of bush rides on it and loved it. It gradually became harder to start, eventually I could only bump start it, it refused to start on the starter or kick regardless of the engine being hot or cold. And now it won't start at all. It will fire and rev a couple of revolutions and then die again if I try bump start it. Here is what I have checked so far : New iridium plug, sparking well. New fuel filter. Fuel pump working and pumping fuel Electrical connections cleaned with contact cleaner and connected well. Fuses are good. Temp sensor is good Efi throttle body is clean Battery is charged up and strong. Exhaust is clear of obstructions Air filter new and clean. Anybody got ideas? I guess I could pull the top off and check valve clearances? But I think this model is shimmed. Also the compression still feels great under the kicker. Thanks for reading Daniel
  15. some help finding an old forum or post,,,someone else had replaced a head and rockers and now it won't even strat till I try maybe 25 times then it backfires and quits the whole time
  16. Before I put my 05 CRF250R away for the winter it was running weird. I noticed it was leaking oil out of the engine cover. It was understandable because i had just put a new stator in. The bike had been running oddly for some time before i realized it was leaking. I just took the bike out for the spring and now it doesn't even start. I bought a new engine gasket to try to fix the leak. I am currently installing it. I am wondering if the low compression could've messed up the top end? I rode it with low compression for about three weeks before it started to bog so bag i couldn't ride it anymore. Will replacing the seal fix my issue or have i created a whole new one?
  17. bansheeboy

    Problems with my 2004 ttr125

    I took my ttr125 out for the first time in a year and it would not get up and going. I took the bowl off the carb and it was green and varnished but the jets weren't clogged. After I sprayed them with carb cleaner anyway I finally got it to start but it still runs poorly. It wont idle and it wont start unless I lay it on its right side to the point where gas is leaking out of some tube. Im wondering if my carb is just bad because I think its some chinese knock off. Any suggestions on what I should try to do next to get this bike to idle and start easier.
  18. Okay so i have had this ds80 for awhile i bought it about 3 months ago and its a 1986 suzuki ds 80 shes in pretty rough shape when i got her dirt and grime wise not to mention she wont start. I began taking the engine apart looking at the fuel thats coming in and noticed on the spark plug that it was fouled up with uncompressed two stroke fuel and that their was barely any transmission oil in the low end so i set out and bought some good top of the line gear oil and regular pil tried to start it like that but it wouldnt work i checked for spark against the cylinder head and it checked out and i was getting fuel so my next thought my seasoned rider friends told me i didnt have enough compression because it was easy to crank over i put my finger over the spark plug hole and cranked it over and their was a decent amount. May i also mention that when i got it the ds8p was flooded and i had to undue that. So after taking apart the engine and the carb the bowl and lower end of the carb were the float resides is super ate up and riddled with white metal oxidation which is from water obviously so i cleaned that up and my next idea is that their is a compression issue so when taking the head off both the piston and cylinder walls looked perfect without almost any scratches whatsoever and their was slight carbon build up inside but that was it eveeything looked great. Was wondering what it could be now my friend just suggested it is most likely the crank bearings or something of that sort but i dont know what it could be.
  19. Hey all I could use some help here about a month ago I had a low speed crash resulting in a broken ankle the second I crashed a buddy go on the bike and rode to the hospital after I was settled in he was riding the bike back to my house the Bike ran out of gas and then refused to start back up mind you it was running good before and after the crash. Since then I have the bike back at my house I have cleaned the carb out fresh 93 in the tank and have still had no luck with getting the bike to run. The bike cranks and backfires through the where the air filter is which I find to be extremely weird. The bike has a fcr carb with 3x3 mod and a yoshi rs3 and a kn Intake. The bikes has the original ACCT and also has about 12,000 miles on it. I have never had any issues before when cleaning the carb or anything of this nature. Any help/ ideas would be appreciated.
  20. Went riding on Christmas Eve everything was working fine went through some mud and slipped dropped my bike tried to kick start it and the kick start went limp pushed it back up got compression again kicked it over a bunch of times started to run again rode it for the rest of the ride with no problems then on the way back on the road I gave it fill throttle and it died hasn't started since and now has little compression. Replaced the spark plug and changed the oil and filter and adjusted the valves but still very little Compression and won't start. Any ideas?? Would greatly appreciate
  21. I have a 2001 Honda XR80r that I'm getting together for my nephew that has been nothing but problems. I've heard it start, but run only briefly and now it wont even pop. I have a new ignition system, spark plug, carb, tank, and it has a blue spark. I have no clue what's causing it. I thought it might be the magnet of the flywheel because it was chipped and not too magnetic. Replaced it with another and still nothing. It kicks over OK and I heard it run before and it sounded decent, just shut off after a while which prompted me to get a new carb. I had to kick it like crazy to get it spinning so it would start then, which is why I thought it might be the flywheel magnet. This is beyond frustrating and I'm beginning to think the little bastard is cursed or something. Might take it down to the stealership for diagnosis because I'm at my wits end. Is there anything I'm missing that would keep it from running? The carb is new, I timed it out and the valves are set OK. Any help is appreciated.
  22. I have a 2004 drz400s motor and cdi that I put into a drz400e frame and wiring harness. This motor ran before I switched frames and harnesses but now I can't get it to start. I grounded the black wire with the yellow stripe coming from the cdi so I have spark now. The clutch switch is bypassed, the neutral switch coming from the motor is not connected to anything, and there is no kickstand switch (I believe that's why you ground the black/yellow wire). When I press the start button it turns over but never catches. It's made a loud "pop" from the muffler a few times. Jetting, muffler, intake are all stock (minus k&n air filter). I've rebuilt the carb and still nothing. I even tried putting the carb, starter coil, and spark plug wire from my other 400s (which runs great) and still nothing. Where do I go from here? Electrical? Valve clearance? I checked the timing, it's good. Any help would be appreciated!
  23. RSDdude

    Battery? Problem

    My '17 450excf 6 days wouldn't start this weekend while I was getting it ready to do some maintenance. Pushed start button and heard a click under the seat, tried again and no juice at all, thought it was a blown fuse. All were good, tried to charge it and same issue. Tried another battery and same thing until I noticed a faint spark coming from the ground wire. It was touching metal, moved it and now works fine. I zipped tied rubber hose around it to prevent from happening again. The blue pen in pic is pointing to where it made contact.
  24. Hey guys Im new to this site and ive got a problem i hope you guys can help me with. I've got a 2000 yamaha yz125 that i just did a full engine rebuild on and long story short i cant get it running. Its got spark and getting some fuel. Also the carb is shooting fuel out the overflow hose on the bottom and i took it apart and found a oring in the needle seat was ripped so i replaced it and it is still shooting fuel out of the overflow. I have put fresh fuel in it and it didnt make a difference. Where should i start to get the bike running and fix the carb. Thanks
  25. whiskeythrottle14

    2011 yz250f floods too easy

    What's up guys! So, the other day I traded my 2008 yz450f for a 2011 yz250f. When I tested it out, it flooded when i first tried to kick it over. Oh well it happens. Let it chill for a bit then it started right up. Ran great. Once I decided to bring it home and ride it, it flooded again when I tried to start it up cold. Pretty much does it every time i try to cold start it. Once it's warmed up it's fine. Also when i try to do 2nd gear starts, it bogs down so damn bad.. Anyone have any pointers? carb clean? float issues? what should i do? Thanks!!
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