Question about 2005 Beta Eikon 150

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Tuning curbs I've read a lot about carb theory and how to adjust needles and whatnot

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So I think I could guess my way through it mechanicly but how do I know where to stop. My eikon 150 running rich currently (black dirty spark plugs) and I would like to lean it out properly but I'd much rather have a too rich bike fouling spark plugs than a too lean bike fouling engines. So how do I adjust it properly and how do I know when it's right? Hey Kit. Are the plugs oily, or are you getting white smoke out the pipes? Well, you may already know these symptoms might indicate another issue besides fuel mix. \Anyway, rich mixes don't make much power. You'll be surprised how quick your bike is when you get the mix leaned out a bit. First of all, I'd make sure the float levels are set correctly and that the float valves are indeed seating. If they don't close off the fuel flow tightly you'll get raw fuel dumping into the carb bores... not good. Also make sure the air filter is clean and there is absolutely no obstruction to air flow. If there are problems with either of these, nothing else you do will matter much. BTW,you'll know you're there when you get a tan or light brown color on your plugs.,,,

Posted on Nov 10, 2008

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Pilot needle clip adjustment after up jeting

Hi, Adam for a leaner circuit the clip has to go up so the needle can go down. For more information about your question please click on the links below. Good luck and have a nice day.
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Sep 03, 2016 | Motorcycles


How to adjust carb settings

Hi Charlie.<br />Operations to be performed depends on how much tuning is needed.<br />Carb setting regulates the ratio between air and fuel in the mixture aspired into the cylinders.Optimal air/fuel ratio is usually around 14(air) to 1(fuel). I illustrated the complete job with cleanup and jet replacement and adjustment. In some situation you do not need to perform complete tuning, which involves taking apart the carburetor. In that case perform basic regulation setup using the two adjustment screws at one side of the carb. Adjustment simple procedure starts from part 2/Adjustment. A good approach is first doing adjustment using idle and thickener screws. Then do the whole tune up if the simple adjustment does not work.<br />The complete tuning is based on carburettor cleanup, regulation of main jet and idle jet and needle setup.<br /><br />Part 1 : Complete tuning and cleanup:<br />1. Take apart the carburettor,<br />2. Undo the float chamber(6 in diag) held by screws (26 in diag).<br />3. Clean bowl with with carb cleaner (put a lot of it in the bow, wait a bit and dispose it-finish the job with a cloth if needed) . Clean floats (nr.4) and other parts using carb cleaner and cloth.<br />4. Use a flat screwdriver to remove the main jet screw (placed in the chamber, held by big golden screw, goes between the floats). Spray the main jet. You must be able to see through it.<br />5. Use the carb cleaner to clean the accelerating pump and all the other parts inside the part. Needle and small parts must be cleaned. Clean the idle jet, which is the smaller golden screws. If you have a compressor blow into the jets (you can blow them even without compressor, but follow H&S).<br />6. If possible replace main and idle jets. Sometimes you may like to replace the jet with a bigger one to get a richer mixture.<br />7. Adjust the needle if needed. A lower needle settings means a richer mixture.<br />8. Remove idle adjustment screw (7) and main adjustment screw(31), clean them screw them back in without tightening and perform part 2. Leave the screws about one and half turn from all way in.<br /><br />Part 2: Tuning and minor cleanup - Here you mainly operate on idle and air (thickener) adjustment screws (8 and 12 in diag)- Start from here, if this does not work, do part one:<br /><br />1) If the engine runs start from idle adjustment: screw or unscrew the idle regulator to adjust the idle speed, the screw is placed to one side of the carburetor and has a spring (part 12).<br />Keep idle least slightly higher than the minimum needed. Example, if the engine stays on slightly below 1000 rpm, set idle to a bit higher with engine revving above 1000 rpm.<br /><br />2) The thickener, placed near that of the minimum screw regulates the air flow. Tighten the screw and unscrew 2 turns from all the way in. Do regulation from this position. <br /><br />Here carburetor diagram and part list. The diagram is taken from service manual. The manual for Lifan 150 (does not include carb setting) has been uploaded here:<br /><br />

on Oct 29, 2011 | 2008 Lifan Delta 250 V Twin

1 Answer

I need to know the proper tuning of ucal mikuni carburetor with mixture adjusting screw on bottom of cabr (beneath float bowl), an idle adjust screw and pilot screw (hopefully pilot fuel screw since s

Why did you need to clean the carb? Routine servicing of the aircleaner would keep the carb clean for life. The pilot screw should be 1.5 turns out approx. with a small adjustment either way. Idle speed is set to a smooth low idle.If this doesn't fix it have you got something in the carb not replaced correctly? The float needle/float assy? How did you clean it? Have you introduced fluff/dirt into the carb and did you blow it clean with an airline?

Oct 09, 2014 | Motorcycles

1 Answer

Carburator cleaning

its like 100 steps. you want us to type that out? and no YEAR?!
clean and tune, now that is even more steps.
got wide band portable oxygen sensor , so we can tune it easy.
or 2 days ,driving on a track and tuning by feel and spark plug tip readings?
so cleaning.
1: dismantle it.
2: clean all metal parts, in cleaner (called carb cleaner)
3: buy the kit.
3: install all parts and kit parts, per the FSM pages on CARB. and
setting the float level per book.
4: set the needle (slide) where it was before. needle clip.

then tune it per the FSM or use WB o2 sensor, at idle, cruise and WOT.

Feb 27, 2014 | Hero Honda Motorcycles

1 Answer

Tune carburetor for rs250

If adjuster screw is towards the front half of the carb, clockwise = lean, anti-clockwise = rich. If screw is towards back half of carb, clockwise = rich, anti-clockwise = lean. Make small adjustments. If you can't get good results then change pilot jet.

Nov 24, 2013 | Aprilia Motorcycles

1 Answer

Had a fuel leak at shutoff now fuel running oout overflow tube

You had fuel leak at the petcock and now you've got fuel running out of the carb overflow? Sounds like two separate problems. The fuel leak at the petcock is probably caused by diaphragm in the petcock. In 1996, Harley went to a vacuum operated petcock and they give lots of problems. Usually it leaks because of a hole in the diaphragm. You must take the square plate off the back and take the parts out. Watch carefully how the parts come out. There's a spring, a needle and the diaphragm. Hold the diaphragm up to the light and gently stretch it. If there is a hole in it, replace it.

As for the fuel running out the overflow, you might have trash in the needle and seat. You'll have to take the float bowl off the carb and disconnect the fuel line. Then, carefully slide the pin out that holds the float in the carb. Remove the float and he needle at the same time. Use compressed air and blow any trash out by blowing into the fuel inlet. Gently wipe the end of the needle and reinstall it. It is easier to do this job with the carb off the engine as you can turn the carb upside down to do the work making getting the needle back in much easier. Especially if you've never done this before. It can get tricky.

Good luck

May 22, 2011 | 2002 Harley Davidson XL Sportster 883

1 Answer

This is my occuring problem I've been having: Bike starts up fine and will run fine in any gear if going slow and not opening the throttle lots. But as soon as open throttle lots the bike instantly...

this does is not related to the idle adjustment. It sounds strange that there is no fuel filter, there should be. the screen is for only stopping any large debri from going to the carbs. follow the fuel line from the tank valve and I will bet you will find a fuel filter. i also would suggest draining the fuel bowls on the carbs and catch the fuel. check for any debri in this gas. You may try running some seafoam carb cleaner thru the carbs. After changing filter and bowl draining does not work you may have to remove the carbs to clean them and make sure all is operating correctly ( slides). be sure that your air filter is also clean.

May 15, 2011 | Honda CR 250 R Motorcycles

2 Answers

How can i tune it myself.. the throttle is a lil

You probably cannot ... It takes special tools and expertise to properly balance a motorcycle carb. If you think it is the carb, take it to the dealer for a tuneup.

Apr 11, 2010 | 2003 Suzuki DR-Z 125 L

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

Needle clip

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.,,,

Nov 10, 2008 | 2003 HM Motard 125

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