Question about Mikuni Mikuni Jet Needle Clip

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Where is the needle jet clip for xl 250 honda?

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If it has a needle jet clip it will be located inside the slide for the carburetor. If you remove the slide from the carb the needle will still be attached. Look inside the top of the slide and it will be held down by a screw/plate/hex retainer or other means. If this is a single carb engine then it will be ok to remove it but if this is a multiple carb engine, then the carb sync will be disturbed and most likely need to be reset.

Posted on Aug 31, 2014


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2002 Honda CR 250 R carburetor tuning

Hi, Lymangroverg if you have changed your fuel delivery system, air filter size or flow rate, mufflers or exhaust system or a significant change in altitude your carburetors need re-tuning and if your fuel system (gas tank, filters, fuel valve and carburetor) is contaminated with ethanol sludge, varnish, rust, dirt, water etc. or your bike has been sitting for months or years without running these components must be "PROPERLY" cleaned and reassembled "CORRECTLY" before any adjustments can be made. Tuning your carburetor is fairly simple once you understand the basic principals. You engine is a simple airbox sucking air in and blowing it out, it is finely tuned at the factory for maximum performance once you upset that delicate balance by changing air filters, camshafts or exhaust systems your performance may go down the and the engine may run poorly, you need to compensate the air-fuel mixture in the carburetor in order for the engine to run smoothly and at peak performance. If you are running multi carburetors you need to sync them first and make sure your air cleaner element is clean and dry for paper elements or lightly oiled for foam and meshed elements and properly installed. Here is how and where you compensate trouble: "TIP" if your engine "BOGS" your not getting enough fuel.
1. Closed to 1/8 throttle is managed by the air screw and pilot/slow jet.
2. 1/8 to 1/4 throttle is managed by the air-screw, pilot/slow jet, and throttle slide.
3. 1/4 to 1/2 throttle is managed by the throttle slide and jet needle.
4. 1/2 to 3/4 throttle is managed by the jet needle, needle jet, main jet, and air jet.
5. 3/4 to wide open throttle is managed by the main jet and air jet.
6. Wide open throttle is managed by the main jet.
If you are running lean, spark plug electrode color is white, engine runs hot and feels like it is starving for fuel you need to go up on the jet size or move the c-clip down one notch. If you are running rich, spark plug color is black or dark gray, the engine runs cool, and bogs down when accelerating you need to go down on jet size or move the c-clip up one notch. When your carburetor is properly tuned for maximum performance your spark plug electrode will be a light tan color like coffee with cream. If you prefer fuel economy over performance you can go down on main jet sizes until a satisfactory level of lower performance is acceptable versus MPH, your spark plug color will be whiter and your engine will run warmer. These tuning adjustments will only make improvements if your intake and exhaust system have no air leaks or sealing issues and the entire electrical system is in proper working order and you have no mechanical issues.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
2002 CR250R carb settings
Carburator Theory and Tuning
1985 1987 Fourtrax 250 Service Manual pdf
Honda CR250R Owner Manual Competition Handbook

Apr 29, 2010 | 2002 Honda CR 250 R

1 Answer

Need a 1972 Honda XL 250 that needs a kick starter Shaft

you will have to find the same model, there were no xr back then

Apr 05, 2010 | 1985 Honda XR 250 R

1 Answer

My elan floods out. Replaced all jets and still

The needle valve is stuck, you will have to get the carb. off and check the float and needle assy.

Feb 27, 2010 | 1989 Honda CBR 600 F(1)K

1 Answer

What level on the needle valve does it go on for a stock cr 125

I believe it's in the middle, or out of five, third one down.
The needle is for you jetting after the pilot (idle) and before the main. Run it steady at 1/3 throttle for 10 minutes, shut it right off, and look at the spark plug color. It needs to be chocolate colored. Too light, move the needle up (Clip down) or too dark, move the needle down. (Clip up)
You can set the pilot and main jet the same way, by running it at an idle, then 1/2 to 3/4 throttle for the main jet.
Note, a bad lag or bog is usually too rich on pilot jet, or even into a rich needle. (too high needle)

Jan 14, 2010 | 2002 Honda CR 125 R

1 Answer

1985 xl250r honda road/trail twin carby Australian model need correct specs for float levels pilot jet main jet needle position mixture screw setting

There is only a manual for an XR250 but it may have the information you need. Go to , and download a (free) manual.

Jan 01, 2010 | 1985 Honda XR 250 R

1 Answer

What should the stock carb jets be for a 94 yz250 with the stock pipe and aftermarket silencer

Stock Jetting for a 1994YZ250 is:

350 main
45 pilot
J8-6EJ33-61 needle

Adjust your jetting down one size for each 1000' of elevation above sea level. Needle clip position on the needle fine tunes the pilot circuit.


Dec 12, 2009 | 2003 Yamaha YZ 250

1 Answer

My 03 cr 125 has low-endbog

Clean the carburetor. Move the clip on the jet needle downward one or two notches if your model has a stepped jet needle.

Nov 23, 2009 | 2003 Honda CR 125 R

1 Answer

Main jet and needle setting for 2003 honda cr250 at 5000 ft elev.

this should get you close, will still have to fine tune due to exacting conditions.....humidity, temperature, pipe, silencer and reeds....however try this:

Main 360
Pilot 20
Needle H1-70
Needle Top Clip
Air Screw 2 Out

Oct 08, 2009 | 2003 Honda CR 250 R

1 Answer


Remove carb. Remove fuel bowl to access jets. Low speed jet is separate off to one side. Main jet is in center and threads into emulsion tube which has metering needle down its center. Unscrew main jet from emulsion tube and replace with bigger or smaller (depending on your desires).

Jun 04, 2009 | 2000 Honda XR 250 R

1 Answer

Hard starting;has stock jets.

Install a new stock spark plug after getting the compression checked and the valve clearances checked. Assuming good compression, use the choke when cold starting but don't flood the engine. Clean the air filter? If, when running, the bike dies when the throttle is turned, remove the jet needle from the throat of the carb and move the clip on the needle down one, possibly two, notches. This will richen the low end mix.

Jun 01, 2009 | 1995 Honda XR 250 R

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