Question about 2003 HM Motard 125

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Needle clip how to change the needle clip position.?

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Red Express read the title he wants to change the needle clip position. Heres how to do it: 1. Loosen the cap from the top of the carb and pull out the slide. 2. Compress the spring and fiddle with the cable untill it pops out 3. Now, there should be a small bolt covering the needle, remove it 4. Pull out the needle and remove the c-clip, adjust to desired position (down to richen, up to lean) 5. Put needle back in and install bolt 6. Install cable 7. install slide and top cap 8. Fire it up and finish tuning carb.,,,

Posted on Nov 10, 2008

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Show me the air ajustment screw on the carb


Air adjustment screws are set by the factory. They hide them under freeze plugs driven into the passage. Having never seen your carb I looked it up for an image. What I see is a Vacuum Diaphragm reliant Carb. The Jet needle is marked -'21'in this image. The C-Clip position on the needle has 3-4 different options. (used to anyway). If it's not working as is, and you do not live at high altitude,(Like Denver), Changing the position won't work. It could mean a worn Diaphragm or Spring. I see adjustment screws for Balancing the 2 Carbs ONLY. Re-Build.bfccbbf8-cdb1-4bb6-a407-6d8cdbc2f4c5.jpg

Jun 27, 2014 | 2002 Honda VT 750 CD Shadow A.C.E. Deluxe

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Just put billet intake and 34mm carbs mikuni on rz and it bogs down every time I take off ? Before I added these it ran faster with stock carbs and intake.. What's the problem?


Check main needle clip position on top of needle. May need to lower clip 1 notch or make sure all vacuum hoses and lines are connected properly. Also make sure intake is seated properly, sounds like it could be losing vacuum somewhere.

Dec 27, 2012 | Motorcycles

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Only runs with full choke, I bought the bike last week and the float needle was stuck and I think it had bad gas. so I changed the gas, cleaned the carb, reset the float needle. I also set the main slide...


Hi mate reverse the needle clip position back to factory setting this issue is pilot circuit for sure - If you have cleaned carbi you need to replace or clean the pilot jet and compress air clean the hole where the pilot jet came out of to clear the circuit. Running only with choke on is classic symptom of block pilot circuit...
Also check you fuel air mix screw this may have been altered trying to correct this issue it should be 1.5 - 2.5 turns out from fully closed..
all the change of needle position clip is doing is allowing your bike to run off the main jet (not good)
and reason for running with choke on is it is changes air fuel mix with choke on compensating for lack of fuel from the pilot jet blockage
regards Jamie

Aug 07, 2011 | 2004 Honda CRF 150 F

1 Answer

2006 Honda CRF 100. Running good, idle etc. Starts to BOG out when in gear, and throttle is moved past approx 1/4. It will rev up fine but if you want to give it some gas (over 1/4 throttle) it just has a...


The carb jet needle clip position controls partial throttle conditions. If it hasn't been moved from it's stock position, the needle is probably worn and should be replaced along with the main jet and the e-clip put back to the stock position. It's really hard to see if they're worn because the parts are so small. They're cheap parts and the fix is pretty simple so good luck!

Jun 12, 2011 | 2005 Honda CRF 100 F

1 Answer

2010 ktm 65 bike hesitates when you give it throttle but when it hits the power band it takes off.


It sounds like moving the main needle clip position may solve this if it's jetted properly. Remove the slide assembly from the top of the carb, pull back the spring and remove the cable. There will be a retainer clip that holds the e-clip and the needle in the slide. Remove that clip and the needle will slide out. Note the original position of the e-clip on the needle, remove it and move it down 1 position. This will raise the needle in the main jet and richen the mixture on acceleration. Reinstall and repeat adjustment until satisfactory acceleration is achieved.
If moving the needle position doesn't solve it, a larger main jet is required. Put the e-clip back to it's original position. Remove the main jet thru the 17mm drain bolt in the bottom of the carb, note the size stamped on it and get the next larger size. A selection of main and pilot jets a couple sizes up and down from stock is always handy to keep around with the 2-strokes as they are sensitve to temperature change.
Always check the condition of the spark plug when making jetting changes. Start with a fresh plug and run it for 10 min at normal riding RPM. Tan is good, black is rich and white is too lean. A lean condition is really bad and must be corrected immediatly. Good luck!

Jun 08, 2011 | KTM 300 EXC Motorcycles

1 Answer

I have a 2002 yamaha yz250f. it started out not wanting to idle so i took apart the carb i got a rebuild kit and put new jets and started the bike up. it started up when i have the choke on. when i took...


Air to fuel ratio is important to starting and running your bike. A lean condition is when you have too much air for the fuel, this makes HEAT. A rich condition is too much fuel for the air, this FOULS plugs. An easy way to adjust this is to change the clip position on your main jet needle. THis is accessed from the top of the carb. It is mounted in the center of your slide. Try raising your needle position, by LOWERING the C-clip one notch.(lower the clip to raise the needle)(raise the clip to lower the needle) See if it runs better and cooler. if its better, but not perfect, try another notch lower, to raise the needle. Raise needle = richer Lower needle=leaner/hotter. Also check to be sure you have correct gap and heat range for your plug. 0.5-0.6mm gap

Dec 01, 2010 | 2003 Yamaha YZ 250 F

1 Answer

I HAVE A 2005 WR 450, STARTS GOOD, IDLES GOOD, FULL THROTTLE GOOD, TRY TO HOLD IT ANY WHERE IN BETWEEN IT ACTS LIKE IT LOADS UP OR GO TO A LIMITER. TRY DISCONNECTING TPS, NO CHANGE, NEW C.D.I AND STATOR,...


Sounds like a fuel problem, too rich in the midrange. You said that it idles good but I'd still check the float level. If that's right, check the position of the needle. The needle has about four or five grooves in the top end of it. There is a small clip that clips into one of these slots. By putting the clip in a slot closer to the pointed end of the needle, you raise the needle making the midrange mixture richer. Moving the clip to a slot nearer the blount end of the needle, leaner mixture. Your needle should have the clip in the middle slot if there are five slots. The second or third slot if there are four. Make sure the needle is installed correctly in the slide so that it does not not raise up. If you get it too lean, it will start to surge when you're trying to cruise.

Nov 02, 2009 | 2004 Yamaha WR 450 F

1 Answer

Jerking at a 25 to 30 mile an hour speed


Look at the slide needle--'c' clip unbroken and retainer pushed down tight. Has the 'c' clip position been changed? Try a new spark plug.

Aug 04, 2009 | 2004 KTM SX 125

1 Answer

Miss


The rebuilder may have move the jet needle position clip. Take the top off the carb and pull out the slide. Remove the needle and then move the clip to position 5 from the top. Try it noe. What you did was to provide a richer mid-range fuel mix. Hope this helps.

Apr 06, 2009 | 2005 Suzuki RM-Z 250

1 Answer

91 kx 250 stock carb setup.


Low speed screw 1.5 turns out from bottomed. Middle position for clip #3 position.
I never rely on the factory settings for the low speed screww, set it to factory and keep adjusting it 1/8 turn at a time until idle sounds best and quick throttle blips dont sound "stumbly" the later being the most important.

The needle position is for low altitude.

Jan 24, 2009 | kawasaki KX 250 Motorcycles

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