Suzuki needles rich to lean

To make up for the overly rich slide Suzuki speced a very lean N3WK needle. Ok. Should my next move be NEDK on clip 3 or NEDJ on clip 2? The needle jet and jet needle control from 15% to 80% of the throttle opening and the main jet controls 60% to 100%. There is a Correct A/F mixture that won't be too lean or too rich and that is going to give you the best performance and reliability possible. This is a text book example of a rich main jet. This will also improve the mileage. Bad news is that many newer bikes have only one clip position. This leads to a lot of lumbering around and then a quick shreak before time to shift gears. The needle valve should get you a happy medium at about a quarter turn counterclockwise from where the motor will sneeze. The main looks about right though. Even the Suzuki needles are this way. 1/4 throttle would be the transition from pilot jet to needle with some overlap. There is a clip and five little grooves that move the Jet Needle up (richer) or down (leaner) in the Needle Jet. If you're running rich, for example, you'll need to check the main jet, jet needle and needle jet. Here's a simple and quick way to test if you are running Lean or Rich at Just about any Throttle position,WOT, Low Speed, Mid Range etc. Is there a "half clip" difference from needle to needle? Ex. Warm up the bike 3. Drill out the brass plug on the idle mix screw adjust for smooth and steady idle if it needs more than 3 turns out, go one step larger on the pilot jet. Rich is the addition of more fuel to the air/fuel mixture. You will either need to have the stock slide cut into a 7. | The next problem is the 6. 40mm). If it stumbles and recovers your Rich It is entirely possible that the engine can be rich at some points and lean at others depending on whether the needle profile is suitable. Carburetor runs clean to approximately 1/2 throttle but breaks up before 3/4 You can try leaning it out with the air screw, but it'll have marginal effect on mixture except at idle You want to change out your pilot or "slow" jet to a leaner one. On most carbs it's a similar procedure so hopefully this Yamaha lean taper needles needs 2 to 3 step larger mj than the rich taper needles like the Suzuki and N1E/NOZ_ series. Sep 18, 2011 · Playing around with the z1 carbs that came on my gs750. RUnning lean will give a white plug. 5 again and get good idle on 2 counterclockwise screw. im sure its to rich. 95mm + 0. Jan 29, 2018 · Want to know what those screws and jet needle slots do? Tuning Mikuni piston slide carburetors, the basics. less popping at those times indicates lean. The NEC* is leaner longer off the bottom so you need to be aware of lean symptoms when it cools off. This would come into play if you were lean at 1/4 throttle, yet rich at 3/4 throttle. IMO, that needle is to rich for your 250, also that 40 pilot jet, when used with that N8RE needle is to lean. The simplistic ideal proportion for our purposes is 14. It is often a window that ranges about 1/2 turn inbetween being too lean and too rich where the power the strongest and the throttle response is crisp. One up on main and adjust air screw. A fast approaching storm will require a richer setting (turn the fuel mixture screw out). also you have to determne how much throttle and rpms are on the engine when it bogs. If the engine pulls better on a full throttle roll-on starting at <3k, when cool but soft when at full operating temperature, it is too rich in the midrange and the needle should be lowered. As mentioned above, the needle jet takes over most of the fuel delivery from the pilot circuit as the throttle is opened. By making large adjustments, over 1/2 turn at a time, you risk missing the sweet spot and going from too lean to too rich, or vice-versa. NET. i can dial in the idle and have great response but it leans out at 1/16 to 1/8 throttle then is perfect after that and pulls strong. 0 slide that Suzuki speced for the 03'. However, you only need to tinker with the main jet and if that solves the problem you found the easy solution. I put the next richest needle in and put it on the leanest clip position. Rich on a low throttle circuit, then lean as the throttle opens farther, produces a strong power surge or hit. I don't think turning the air screw out will have any more effect after 2 1/2 turns. lean refers to the relative proportion of fuel and air that is combusted inside an engine…compared to the practical “ideal” proportion. Yamaha, Kawasaki, Honda, Suzuki, KTM Rich and lean in the context of jetting refers to the fuel:air ratio. tests from our friend Alleyoop for determining if your carb is running rich or lean, I used that procedure when trying to make my 1980 Honda CB750F run  29 Oct 2012 How do you tell if your pilot jet is too lean, rich, or just right? Are you going to move on to the needle and main? 1985 honda shadow 700. 1. Lowering the needle will lean the mixture. The NEJC needle swap is the best thing I've done to my KTM (along with pilot and main adjustments). Re-cleaned entire carb, new float needle and seat, new needle jet. Another way is to place a small washer under the Jet Needle clip to richen the mixture. but same, i feel the engine so rich while running low. proper ajusted -because 38 is littlebit too rich and 35 littlebit too lean) Too rich jetting (too much cutaway, needle positions too high, too large a needle jet) can If it's too lean in this area, the bike will feel really flat and down on power, but will respond Yamaha four-strokes have an accelerator-pump circuit. Unfortunately a plug chop is only of minimal help. and if I screw all in, the engine will dies. This is just what works for us on the 300s here, but it should be close. Condition: Needle or needle jet is too rich. Try brake cleaner or a shot of ether, double check float hieght, pressure test should be a sign something is leaking, I would recommend trying a 48 pilot if everything else checks out, see if it bring your airscrew back into range, not every bike is the same, on my stock bore yz I ran a 165 main, suzuki needle and a 45 pilot, it now has a 300 cylinder I run a 168 main, 45 pilot and suzuki So I have a 2013 300 that I was thinking of trying the Suzuki needle in. There isn’t really any way to test the needle other than by feel, but it’s usually quite obvious when it’s right or wrong. . Always tune from rich to lean. of the float bowl, the screw meters fuel and opening the screw (counter-clockwise) out results in a richer mixture. Keihin PWK Needle Clip. Get on a long straight away and get it going wide open in the highest gear Raising the needle will richen ur mixture, and if it is a rich bog it will hurt you, but if its a lean bog it will help. I had to remove the carb again and raise the float level slightly as it still wasn't right but now starts perfectly. Look at your spark plugs they should be a nice chocolate color. JET KITS are available if needed. If it is too lean, yes you might have a little more power but you are going to destroy your engine. 45mm = 40. I'd reset both carbs a bit lean initially (2 1/2 turns) for my Akro and K&N, so tore apart the enchilada and gave it a tiny bit more. Fine Tuning -Your BGQ is too rich at 1/2 throttle in its present position (#4) but leaning the needle one position (to #3) causes the engine to run lean. Raising the clip on the needle will lean out ur mixture and do the opposite of raising the needle. More fuel relative to the  ** Use smaller needle jet (P-6 or P-4) to lean out midrange if it's too rich. The best way to tell if your running lean or rich is to perform a plug check. You can take the air filter lid off or take the air filter out to play around with it. 4-4 MACHINE TUNING NEEDLE CLIP POSITION Lean 1 2 Needle 3 clip Rich 4 5 The jet needle is linked to the throttle valve by means of the needle clip. With the Suzuki needles, NEDJ in mid spring to mid fall (60s) and NECW when cooler. last night i was try using 17. How to adjust the needle Imagine that the head of the needle valve—the part that looks like a screw head— is a clock face. Mar 13, 2006 · Yamaha, Honda Suzuki (the instigator of the TMXx) and others. Jetting a dirt bike is just changing the size of jets and adjusting the needle to change Worn reeds will mimic rich jetting, and worn rings will mimic lean jetting . Based on the comparison of the both needles they do overlap and setting the rich needle on the leanest position it equals the stock needle on the middle position. 5-3 turns out depending on season "+" Did the jet adjustments with a needle, polishing compound and a Dremel. Don't mess with all three jets at once. If the engine pulls better or is smoother at full throttle/5k-7k in a full throttle roll-on starting at <3k when cool but soft and/or rough when at full operating temperature, it is too rich in the midrange and the needle should be lowered. The Mikuni jetting chart below matches different series needle jets with A mixture that is too rich will let the engine run cooler, but it will also cut way back on performance. On Yamaha’s – the North American needles differ from the European needles – for example. Carburetor problems generally fall into three areas: too lean a mixture, too rich a mixture, or an incorrect adjustment. The wrong mixture can cause overheating and vapor lock, excessive wear, or cause the engine to stall. Best Main Jet must be selected before starting step 2 (needle height)! Check out and RESET all: Suzuki (all), Yamaha (all) and Kawasaki (if low the low speed mixture screws are probably set too rich: try 1/2 turn in, to lean the idle mixture. If symptoms improve or disappear, you are lean and need more fuel. Suzuki KQ 300 carburetor advice like it is getting LEAN and stalling rather than getting RICH and I meant that if it is running rich now, replacing the needle Jun 24, 2008 · From 1/4 to almost 3/4, it's the Jet Needle taper that makes the major adjustment. The thinner the taper, the richer the mixture. When tuning, turn the needles in one-hour increments and allow 30 seconds for the adjustments to take full effect. If the needle is dropped all the way lean and problem still exists, try a leaner needle. if i richen As you say the thing sounds too rich. if the motor has too much fuel it would be considered rich, you would turn the knob to the lean side. NECJ is more rich than the NECK, but both are more lean than the NECW. i have an NECJ, NECW, NECH needles. 45mm to your BGH results in a GHH (39. If you have a non-adjustable type, measure it and you may be able to get a replacement of the same size but with the five grooves. Needle jets are available in an assortment of sizes for most of the Mikuni round-slide and flat-slide carburetors. Jul 30, 2015 · So I've read through a lot of the posts on the carb. -If you think it is running rich, then lean it out to see if it runs better. Mar 10, 2014 · 3) Jet needle aka Needle – Affects the mixture from 1/4 throttle to full throttle. An engine that runs rich won't necessarily make a change in sound, but you'll be able to smell it. Further depending on the holes in the bottom of the slides you can land up with the fueling going off on sudden changes of throttle. @ - Suzuki 2002 LS 650 Savage question Needle or needle jet is correct: Carburetor should run clean to approximately 3/4 throttle. the NECH made it better but still its lean and knocks bad if crack the throttle a tiny bit. If the bike sputters or sounds rough when giving it throttle, raise the clip (lowering the needle) until it runs cleanly. When you notice a Stumble, Back off the throttle a little 1/8-1/4: 1. Raising the clip will lower the needle into the jet, creating a lean mixture; lowering the clip will raise the needle, creating a rich condition. Re: Jetting: - 03 RM250 running rich i have an 02 rm250- i had the same problem u did- i changed some jets ang got it right- there is still some that comes out when i first start it - other than that it runs good, and hardly any black crap on the fender- i love my rm, u will love your's too Sep 14, 2015 · That's right 35 is the smallest pilot. C. Mark the throttle grip at 1/4 and 3/4 openings. Running a lean mixture makes the bike run hott and this could cause a burned piston. running rich is safer than running lean. Unplug it and it will go into the SAFE mode, which is rich. That 24mm Mikuni that needs replacing on your 2005 Yamaha TTR125 isn't If it's a lean condition, the plugs will tend towards a bright white color. I read the 3 main ones. If the clip is lowered, the jet needle is raised and the mixture will be richer. I've not had a carb on a bike, so I'm not sure how to tell if it's running lean or rich or maybe it's just right. Jul 10, 2017 · Subject: Re: Removing airbox to lean out rich bike ('02 VZ800) Fri Jul 07, 2017 3:36 pm Update: I've opted to cut half of the flap that blocks part of the mouth on the end of the filter out. The article has been taken from here The Secret World of the Fuel Screw - SuzukiCentral - #1 Source for the Suzuki Z400 - TheATVChannel Apr 14, 2019 · Briefly, rich vs. i have a 1998 yz250 with a kehin PWK carb conversion. If it surges ahead your Lean 2. i bought some suzuki needles and they run very nicely other than a nasty lean spot right off idle. So once again we must find the setting that is too rich for the engine and then lean out slightly. so some have a lean mid range with a rich main some have rich mid and lean main jet. The larger the diameter of the straight section or "L" length, the leaner the mixture. I fiddled around with my pilot settings and needle settings to try and get rid of a lean situation. On my 250RR I switched to the NEDW needle. EXAMPLE With the speed screw set at no more than (1 1/2) turns in after contact with the stop lever; and the best idle occurring with the mixture screw set at 3 turns from bottom, indicates the need for a larger Idle May 21, 2016 · How to diagnose a carburetor problem in less than 5 minutes TheMotorcycleMD. You don't want it too lean or too rich. should be rich enough that it is just a size or two below the “sputter” point A needle that is set in a clip position that is too lean will also cause hesitation or. The Factory Pro HDJ System allows leaner jetting without surging than the stock style needle jet for best mileage and the "others" can't claim that. In this case you can choose a needle with an L1 measurement between the two. Never loses full power, just moments of less. Apr 18, 2009 · Also you can adjust your lean/rich by your mix, which will allow you to dial in performance. The main feels a bit rich as it breaks up a bit when I'm on it, so I went back to a 165 but haven't had a chance to get back out since. Type, Start Jet, Pilot Jet, Air jet  18 Feb 2014 Is My Dirt Bike Running Rich or Lean? If you're running rich, for example, you'll need to check the main jet, jet needle and needle jet. Jul 11, 2013 · We are showing this on a Keihin FCR carburetor off of a WF250F but we also demonstrate how to get to the needle on a Keihin PWK carburetor which is found on popular 2 strokes. the NECJ on clip 3 is a "half clip" leaner than the NEDJ on clip 3 ? I am running the NECJ on clip 3 and it is fairly rich and gurgles down low. It is Similar in taper profile to the oem needle that is used in current yz250's, but much richer in diameter and L-1. i think the old YZ needle was masking the issue by being really rich. The fix is a Suzuki needle from RM 250 2004 to 2008. The Needle Jet and Jet Needle The needle jet and jet needle regulate fuel delivery throughout the mid-range. Ride the bike between these two marks. I've tried using an NECJ needle and IMO it's to lean. The tapers are designed very A good indicator of overall jetting is the weatherif popping/backfiring increases on humid days, or at higher elevation, that indicates rich. 4 Aug 2013 Adjusting your jet needle makes your engine run leaner or richer. Mileage went from 160 (pretty lean for summertime), to ~175 - 178, whereas before the problems it'd be 180+. If the stock needle is �shimmed� up, the needle holder will not engage its �lock notch�, thereby foiling the That is a very rich duel taper needle for a 250. With jet numbers, higher is richer and lower is leaner. Correction: None needed. The tube is fixed. Needle clip position; This can be tricky, but the same rule of ample fuel applies. That's why mileage after the HDJ rebuild may be better than stock. I use an NECH needle in my 07' RM. run it with the boddy off and turn the needle in (in small increments) or turn the needle all the way in and then back it out to 2 and 1/2 turns warm it up and open the needle up to 2 and 3/4's to 3 turns thats bout were my stock trx is set and after try and remember hope this helps needle? clip positions 1 from top, 2 from top (needle, needle jet wear, transition to mains, spark plug says a little rich on enlarged mains) pilot 37. Tried the NEDJ but it was too lean. From around 3/4 throttle to wide open, you're on the Main Jet. 8 May 2019 We've covered how to set your float height, how to tune the idle circuit, and how to jet for rich and lean on the main jet. RM85 motorcycle pdf manual download. See…. The bike comes with a horrible needle taper and rich on the pilot and lean on the main. If you want to lean the mixture I guess you are out of luck. If it's white, the air/fuel mixture is too lean and a bigger main jet will have to be  Often the problem is bad fuel combined with clogged pilot and needle jets that need We've identified that jet sizes and fuel level create rich or lean conditions. Note that the stock needle is so lean at 3/8th, people often go rich on the pilot and/or needle to smooth out the delayed hit, but the side effect is more 1/8th blubber. jetting is balancing…. I demonstrate rich and lean INCORRECT settings as well. 7:1 This is known by scientists as stoichiometric combustion – the ideal combustion process during which a fuel is burned The jet needle and needle jet affects carburetion from 1/4 thru 3/4 throttle. Now. Now I don't know where the pilot screws are on your bike but if someone fitted different needles they will probably have drilled out the little metal covers on the pilot jets too. if a motor is running lean it needs more fuel and you would turn the knob to the rich side. Stock Yamaha XT500. Pull the slow jet and get one a couple of numbers below the one you have now. In humid climes, you might need to lean the setting in the afternoon as the day dries out. More gas needs added to the mixture. Adding half a clip position length or 0. yes indeed. Operating just under the pipe's power band only makes it behave worse. That screw head gives you twelve hours per one full turn. What I think it is acting like: Around 3/4 throttle it stumbles a bit. if it is running rich they will be black with carbon build up. May 24, 2019 · Lean is the addition of more air to the air/fuel mixture. The diameter of the needle controls how much fuel escapes around the needle while still inside the needle jet. Mikuni needles are made in several different lengths to suit the various different Installing a richer air jet resolves this lean spot, and reduces the scoring risk. If you are still too rich at 0-1/4 throttle you should try a needle with a fatter straight section. The position of the needle in the jet can be adjusted by removing the needle clip and positioning it on a higher or lower groove in the needle. A clean Mikuni carburetor with a properly adjusted float valve will perform very well May 18, 2011 · Once you have found the correct main then move to the mid range (needle). if there any possible the pilot jet was broken or the size is incorrect due imitation product? or maybe i need to setup the float more lean? thank you for the reply Matthew. More power is produced when you are slightly rich as opposed to slightly lean. The extra length above the clip position is an attempt to frustrate the �immoral performance minded defilers of nature� (in California) from �shimming� the needle and perhaps run a little rich. Luckily there are telltale symptoms that will tell you which problem you're dealing with. The article has been taken from here The Secret World of the Fuel Screw - SuzukiCentral - #1 Source for the Suzuki Z400 - TheATVChannel Quick question: The suzuki needle chart is shown lean to rich, top to bottom. The needle calibrates the full to the change in throttle valve (slide) opening. If the engine pulls better when fully warmed up but still not great between 5k-7k, try raising the needle to richen 5k-7k. You could even play with the IAP (intake air pressure) sensor to lean out the bike. 5+ idle mix screw 2. If your motor is running lean, it will "sneeze" at low rpm, if it's running rich it will smoke and foul the plugs. Mar 10, 2014 · To lean out the needle, you need to raise the clip. The needle controls 1/4-3/4 throttle, jet is 1/2-wot, if you have an air mix screw it affects closed - 1/4. This is what causes the visible rich condition, and confirms the need to increase the jet size. From 3/4 throttle to full throttle, the motor should start to break up as a result of too rich condition. its strange. It's a triple taper needle that is leaner on the bottom and richer on the top than the stock KTM needle. BONUS: RICH LEAN Fuel Settings explained! Motorcycle Mikuni CV Carburetor Cleaning for Suzuki, Honda, The rich blubber/stutter with the stock YZ250 jetting is primarily a function of throttle position not so much RPMs. So Re: lean -rich setting, 15 hp evinrude? Snowdrggn, We've got a slightly newer version of the same motor ('86) and I rebuilt both the carb and fuel pump because it was hard starting at times. The needle straight section also has an effect in that area along with the pilot size and air screw. RM85; RM85L Suzuki. A Jet Needle with a thicker taper is leaner, thinner is richer. It can be from both actually, if you are running too rich, the pop will come from the exhaust usually with some flames, too lean and it will pop in the intake Show Full Signature 2005 GSXR 1000 Mar 16, 2016 · In this video: How to inspect and adjust the fuel level is critical to performance and mileage. rich is a term used to describe more fuel, lean is less fuel. 2002 Suzuki LS 650 Savage air-fuel mixture adjustment Want to know how to adjust the air/fuel mixture. These bikes just crave fuel I definitely agree with you're statement! Jul 04, 2019 · An engine that runs lean will ping at higher RPM, when the throttle is open, as if you were flooding a gear. View and Download Suzuki RM85 owner's service manual online. A clip position that is set too rich is much easier to recognize than one that is set too lean. 0 or buy one. Now we get into the piece  Yamaha pilot jet part numbers: However, if the jetting is way too lean or rich, your Banshee will overheat rapidly resulting in A#11:Since the problem is between about 1/4 and 3/4 throttle, your needle clip position may be rich or lean. I show how to adjust the clips on the fuel needle to enrichen or lean out the mix. The length of the needle comes into play here too. A too-rich needle can often be felt simply when revving the bike on the stand. I bumped the pilot up to a 38 from the stock 35, and the main to a 168 from a 165. Re: Tuning Stock LS650 Carburetor Reply #2 - 02/28/10 at 05:05:51 The reason I raise the idle rpm slightly during the tuning procedure is to help keep the carb bore air flow velocity up, which creates a better "pull" of the fuel through the pilot system and makes the system more responsive to slight changes of the screw setting. Going to stick with the 168 main jet 165 main felt to lean. May 22, 2013 · Here is a simple test you can perform to sure if you are running lean. This fuel/air mixing takes place in the carburetor. W = I (so that the letter I is not confused with a #1) 4th digit = straight portion To lean the fuel mixture the ‘E’-Clip is raised on the Jet Needle. Here is a good carb tuning guide from KDXRIDER. thicker the taper, the leaner the mixture since the thicker taper will not allow as much fuel into the venturi as a leaner one. The needle is in the leanest position when the clip is on the top, and richest on the bottom. It seems to me that you guys are thinking about this right. It's too rich. If it doesn't solve the problem then you'll need to check the jet needle and then the needle jet. Get in an open area 2. Raising the clip, lowers the Jet Needle and leans the mix. This means that when you open the throttle about one eighth of the way open, all of the gas/air mixture going into your engine is controlled by the idle jet. Motor will rev through the mid range then becomes gurgley (technical term) at full throttle and power is sluggish. -Double check your TPS setting. The right air/fuel mixture keeps the engine running at its best. This was about 5*C and 2000' ASL. This is why small adjustments are always recommended. Take some masking tape and tape up the pods, blocking 25-50% of airflow. this will increase airflow to the filter by about 50% and should help with richness issues. suzuki needles rich to lean