Harley Idle Mixture Screw Adjustment

If it does, turn the idle MIXTURE screw back out the two full turns and go back to step 3, increasing the idle speed setting (in clockwise another turn). 75 thread, size 68 (0. How to adjust the mixture screws on your carb. Turning the idle mixture screw in, or clockwise, will lean the idle mixture and turning it out, or counterclockwise, will enrich it. The key to performance on your motorcycle is proper adjustment of the mixture screw EZ-Just to fine tune following any change such as a rejet, exhaust change, or upgrade to air cleaner or intake. We are long time (35+ years) car guys, driving, drag racing, tuning and restoring muscle cars. Back off intermediate needle 1/8 turn to slightly richen mixture. Easily tune and adjust your idle mixture without burning your hands or fumbling with a screwdriver. Idle speed set screw for Harley CV and Keihin carburetors. Next turn the idle mixture screw out until the rpm’s start to taper off. If the bike stalled while doing that go back to previous step and raise the idle speed a bit more. Pilot Jet: The idle jet is not replaceable. It may sound too old fashioned, but I have had to learn how to adjust the idle mixture. POWER OR LOAD ADJUSTMENT (TYPE B, TYPE C) Set throttle or governor control lever in slow idle position and adjust throttle stop screw for the correct engine idle speed. Shop a curated array of mixture screw spring adjuster available for purchasing right now. The engine must be at full operating temperature. Subsequently, the idle mixture screw should be turned counter-clockwise by 1\IS t urns. Next turn the idle mixture screw out until the rpm’s start to taper off. ) in that it is located upstream of the throttle valve (slide) and meters air; turning it counter-clockwise leans the mixture off idle. b) Idle adjustment The idle adjustment may be undertaken while the sled is at a standstill, as soon as the engine has warmed up: a. The screw I think you're referring to is the low speed mixture screw - there's not a lot of adjustment in it. 5-125 main jets 12. Adjust the idle mixture screw in or out within the range until a 50 rpm increase occurs at which point the idle mixture screw is in the correct position. The original EZ-Just mixture screw for Harley CV carburetors adjusts the air idle mixture. I was careful not to over-do it as I didn't want any to enter the idle circuit. thats how I installed it but I wanted to take it back out and I had to dig everything out it was stuck down in the idle port of the carb. If you do, call Lectron. next would be to remove the carb. The first thing to do is not set up the idle speed, but to set the Idle mixture screw to lean best idle setting. Unable to adjust idle mixture correctly. Buy KiWAV motorcycle idle mixture screw Carburetor Carb for Harley-Davidson 90-06 CV Carburetor CVK 34-36 Keihin carburetors: Carburetors - Amazon. Cleaning the Choke and Air Mixture Screw. It controls the flow rate of the air being delivered to the perforated tube located just above (or attached to) the low-speed fuel jet or "Idle Jet". It is not a fastener, it is an adjustment needle, really). AIR SCREW: This adjustment screw is located in the air-bleed passage. 45 pilot jet. This is the small flat head adjustment needle either located just above the float bowls mating surface with the carburetors body, Or located towards the bottom of the carburetor. (could be. b- Idle Speed Screw, ½ turn clockwise from engagement point. Buy KiWAV motorcycle idle mixture screw Carburetor Carb for Harley-Davidson 90-06 CV Carburetor CVK 34-36 Keihin carburetors: Carburetors - Amazon. Adjust idle mixture by turning Idle Mixture Screw slowly clockwise until the engine runs poorly. Engine should not miss or surge at this adjustment position. Back the idle mixture screw out about three turns. CV Peformance has exclusively provided Harley riders with the EZ-Just® for over 20 years. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a. The adjustment should be no more than an eighth or quarter turn. can you explain how the cv idle screw packing kit goes on the stock idle mixture screw. The idle mixture has been preset at the factory. Sands L-series Carburetor Idle Mixture Screw Spring Adjuster Adjustment Harley. The idle stop screw is off to the side of the high-speed needle. You will need a small screw driver for adjusting the screw unless an. The idle mixture itself is "tweaked" by the idle screw, which is simply a needle-valve that vaies teh fuel flow at idle. Drill a small hole in the small flat plug, and screw in a small screw to pry out the disc. Idle Mixture Screw - Broken Tip Removal. The manifold and carb flange gave no response to the ether. The air screw blocks (turned in) the idle air circuit (which bypasses the closed slide) at idle, making the mixture richer. need to re-adjust the mixture screw. Under the carb is an idle mixture screw recessed into a hole that must be exposed by removing a small disc shaped plug to facilitate mixture adjustment (carbs that I sell, or rebuild will have this disc already removed). Engine Warm. The screw adjustment (explained in the video) is used to fine tune this adjustment at idle speed only. Start the process of making sure your Harley or Indian motorcycle is safely standing upright and is properly supported to make sure it will not fall over. The tips break off easily in the metering hole when overtightened by overzealous "mechanics". m, by adjusting the IDLE SPEED SCREW. Back off intermediate needle 1/8 turn to slightly richen mixture. screw counter-clockwise until it runs smoothly—if you go too far the engine will start to stumble. Although you CAN alter your idle with that screw, you will only be compensating for another problem. Showcasing a big assortment of interceptor adjustment passage spring here online. You must have reliable low speed power. this might sound stupid but its driving me crazy. You do not need, nor do I recommend, any non-Harley parts. For reference here is an excerpt from Lycomings Operations Manual regarding Idle Speed and Idle Mixture Adjustment: e. You turn the air screw in to richen the mixture, and out to lean it. Here's a carb diagram showing the pilot mixture screw. You can unscrew it for cleaning but no need for that on a new carb. Find the idle adjustment screw. 26 How does the CV carburetor work and adjustment screw harley-vacuum-slide/ Then Custom Cez goes through the process of adjusting the idle mixture screw to. These two controls interact and a good adjustment procedure is as. With the car off turn each screw in until it just bottoms out (not tight) them back each out 1 1/2 turns. Start with one of the carbs, adjust the jet adjusting screw "IN" slowly, until you reach the top (don't over tighten). Slowly turn the. If you have a large fan, use it while adjusting the mixture. harley davidson talk forums. The adjustment of the FUEL screw should be made using the "idle drop" method I have out-lined before. I air fuel mixture is wrong and i need to adjust it but worried about messing it up more. If the carbs are being fitted for the first time, screw all of the idle mixture adjustment screws fully home and then out 2. For anyone on two wheels, motorcycling enthusiasts, Harley-Davidson Magazine, seekers of information on building and maintaining motorcycles, motorcycles for sale, Sturgis Rally. 43A I dle Mixture Screw. Step 7: Adjust idle mixture screw until you achieve a smooth idle. Accelerator Adjustment Screw, 2 turns counterclockwise from seated. Here we will look at how to clean the idle air. Now go back and readjust the mixtures. Here's an alternative when doing the 22 cent mod. Maintain proper idle speed and repeat the adjustment each time you adjust the idle speed. Slowly turn the screw counter-clockwise until it starts to stumble. 3) Start engine and run until oil and engine is warmed-up, and adjust throttle stop until you get 1000rpms. There is no magic number of turns. Fits all models of new Bonneville. Back each of them out 3-4 turns. "Lean Best Idle" Procedures. Turn the idle stop screw counterclockwise in ¼ turn steps between trials to allow less air to flow through the throttle blade. Idle mixture screw out of adjustment. Optimum air to fuel mixture (14 to 1) is called stoichiometric, which means: chemically balanced. If you are adjusting the idle for a set of carbs already fitted then progress to the second stage. Instructions on how to fine tune the mixture on a Harley carburetor. The biggest obstacle to tuning your carburetor’s mixture setting has always been accessibility. The opening is sealed with a plug because it is intended that the idle mixture be non-adjustable. Two windows that pertain to TPS reset will open, but only the left window is active. Turn the idle stop screw counterclockwise in ¼ turn steps between trials to allow less air to flow through the throttle blade. Welcome to SU. 5-125 main jets 12. and sometimes when i turn the truck off it still stalls and backfires. How to adjust the mixture screws on your carb. screws out another ¼ turn. As such, it is richer in the off-idle to ¼-throttle range and works just right. This is the. Actually you want the idle speed screw all the way out when adjusting the idle mixture. Find the Yost Performance Brass Idle Air Adjusting Screw for all CV Carburetors - CVMS at Dennis Kirk. If the bike stalled while doing that go back to previous step and raise the idle speed a bit more. Do I need to rejet or adjust my carb for new exhaust? Is it as simple as adjusting my mixture screw or something? Idle speed and mixture (leaner/richer)?. - idle mixture screw for 76~89 Harley big twin Cycle Pro Idle Air Adjusting Screw for. We believe in helping you find the product that is right for you. Start and run the engine until operating temp is obtained. Normally, the idle mixture screw ought to only be involving two and 3 turns out from it's seated placement. Set the air screw mid-way between these too-rich and too-lean positions. " I tried do like this so I set two turns out and set about 1000 rpm. 26 How does the CV carburetor work and adjustment screw Written on 01 January 2016. Engine revs up and down and then stalls! When I start my engine, the tach shows the engine rev-ing sporactically up and down (approximately between 800-1200 RPMs, which seems like a large range). If the throttle plate isn't fully closed some gas comes from the figh speed (power) jet and the interact more. Set the idle adjusting needle for smooth idling. Carburetor master rebuild kit. Main Jet: The main jet is a screw-in, recessed-type, M6-0. Turning the needle in (clockwise) reduces air and makes the mixture richer, while turning it out (counter clockwise) admits more air into the mixture making it leaner (avoid using a mixture that is too lean). Turn the screw clockwise to increases idle speed and counterclockwise to decrease idle speed. Do not over-tighten the idle mixture screw. I believe increased turns out (anticlockwise) will increase fuelling resulting in a richer mix and turns in (clockwise will lean off the mix) decreasing fuelling. Compatible with all Harley CV style carburetors (1989-2006) and replaces the stock mixture screw. You want to adjust this second screw. air mixture screw tip broken off in carb body I just picked up a running (barely) but unrideable 1979 CX500C. A JD two-barrel does not use a load needle like a single barrel. Welcome to SU. Air/gasoline adjustment screw: the carburetor pictured in the exploded view uses an air adjustment screw (#5 in illus. it was made in the last year that these 2 strokes were made I believe about 2008 or 2009? the screws are cut off flush with the carb body and have no slots. Screw the mixture screw in until you can just notice the idle start to drop. Cv-performance. 4- Adjust idle mixture by turning Idle Mixture Screw slowly clockwise until the engine runs poorly. If backfiring occurs by way of the carburetor then adjust the idle combination screw out another one/8 turn. since the previous owner screwed around with the carbs. 48 Idl e Speed Screw Cup. (G) Curb idle transfer passage: Machine passage for idle fuel discharge to secondary side with two-port idle mixture screws. IDLE SPEED: 1. Adjusting the idle mixture. m, by adjusting the IDLE SPEED SCREW. So if i just wanted to lean it out a little which way do i need to turn the mixture screw. Normally, the mixture screw should only require 2 to 3 turns out from gently. Recheck the idle adjustment with the Uni-Syn and Tach meter. Now turn the idle mixture screw outward until the engine begins to run smoothly + 1/8 of a turn. Set the air screw mid-way between these too-rich and too-lean positions. Right about the middle between the two is the idle adjustment screw. Turn the fuel mixture screw …. Turning the screw out allows more fuel into the carb, turning it in reduces. Shop with confidence. Adjusting the air and gas mixture adjustment screw on the Ford carburetor is a process you can complete in less than a half hour. Harley Davidson FXSTD Softail Deuce 2001 Carburetor Master Rebuild Kit by S&S Cycle®. It is not a fastener, it is an adjustment needle, really). At low speed, in first and second gear, going slow I get a hesitation and popping back through the carb and it seems as it’s gotten colder it happens at around 55mph also. The Tweaky Idle Ajuster was designed by Keino to replace the OEM idle screw and allow you to adjust the idle speed on s Super E/G Carb without tools. Now go back and readjust the mixtures. The idea is to turn the mixture screw in until the idle speed drops, then turn the screw back out until the idle speed rises and drops again, and set the screw in the middle of those two points. The horizontal screw is the low speed mixture adjust (aka bypass screw) You should loosen the lock nut and wind it fully in (be gently and use a small screwdriver, the thread is brass and if you strip it you will be sorry). Usually turned by human fingers. 6º and the idle stop screw on the left throttle body must not be touched at all. Engine will not start; Engine hunts (at idle or high speed) Engine will not idle; Engine overspeeds; Idle speed is excessive; Engine starves for fuel at high speed (leans out. At low speed, in first and second gear, going slow I get a hesitation and popping back through the carb and it seems as it’s gotten colder it happens at around 55mph also. 26 How does the CV carburetor work and adjustment screw harley-vacuum-slide/ Then Custom Cez goes through the process of adjusting the idle mixture screw to. if equal and to specs, now we tackle the mixture. Some idle jets can be real tricky and never seem like they’ll be cleaned out. It's simply a small hole drilled into a brass rod that's then pressed into the carburetor body. The tips break off easily in the metering hole when overtightened by overzealous "mechanics". Uneven Running. Carburetor master rebuild kit. The idle mixture itself is "tweaked" by the idle screw, which is simply a needle-valve that vaies teh fuel flow at idle. With the bike warmed up and the idle set around 800 rpm, simply turn all four screws out another ¼ turn. AIR SCREW: This adjustment screw is located in the air-bleed passage. If the bike stalled while doing that go back to previous step and raise the idle speed a bit more. Brass Idle Mixture Screw for Harley With. a lot of factors involved regarding exhaust system, air leaks, choke, etc. Mikuni Flat Side Carb Tuning for Dummies rpm idle speed. Under normal circumstances, the idle mixture screw should be between 2 and 3 turns out. First, turn in the mixture screw until the engine dies or runs worse, then back out the screw (recommend turning ¼ to ½ turn at a time). Stihl 031, 032, 045, 056 Chainsaw Idle Adjust Screw And Spring Oem 11151226200 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name. Never set idle adjustment to slowest possible speed. if set too low primary baclash will catch you out. Find the idle adjustment screw. Here we will look at how to clean the idle air. The mixture screw may have a black plastic limiter on it put there for anti-pollution purposes that can be heated with a torch until you can pop the limiter off (be careful not to set your cart on fire!). and it says "The idle mixture screws should be turned in (clockwise) until they seat gently. It was revving high and when I shut down the enrichment it was still high. Re: Mercruiser 3. the idle mixture more lean. Screwing them in will allow less air. New Easy Adjust Fuel Mixture Screw Motorcycle ATV Fcr Carb Motor Air Carburetor See more like this Car Idle Mixture Screw Kit For Harley 1990- 2006 CV & CVK36-34 Keihin Carburetor New (Other). If results are inconsistent look for vacuum leaks. All Harley and metric riders are welcome. Loading Loading Working How to adjust the air or fuel screw on a typical motorcycle or ATV carburetor. When all is as it should be, it should provide proper idle fuel at the 1-to-2 turns out spec'd. Cant loosen or tighten it. Start bike, bring to operating temperature. Close enrichener as quickly as possible. Step 7: Adjust idle mixture screw until you achieve a smooth idle. It must, therefore, be cleaned at regular intervals. Now start the car & get at operating temp with the choke fully open. a lot of factors involved regarding exhaust system, air leaks, choke, etc. Set the idle mixture screw halfway between the positions, or at the strongest idle. Motorbike CNC Adjusting Carb Rebuild Mixture Screw For KEIHIN CV Carburetor 1990 - 2006 Harley 2006 Harley CNC Adjusting Carb Rebuild idle Mixture Screw ,a brass. it was made in the last year that these 2 strokes were made I believe about 2008 or 2009? the screws are cut off flush with the carb body and have no slots. If you have the idle RPM set too high, your idle mixture adjustment will be irrelevant. The key to performance on your motorcycle is proper adjustment of the mixture screw EZ-Just to fine tune following any change such as a rejet, exhaust change, or upgrade to air cleaner or intake. Turning the idle mixture screw in, or clockwise, will lean the idle mixture and turning it out, or counterclockwise, will enrich it. Now do one side at a time. Alpha Rider Pro Carb Rebuild Kit Mixture Screw For Keihin CV Carbs For Harley Big Twin 1990-1999, Twin Cam 1999-2006 & Sportster XL 883 1200 1988-2006 Allows for quick idle mixture with no tools Precise adjustment reduces emissions and helps to reduce off idle spit Knurled edge for easy grip Precision tip shape for maximum efficiency Requires. Normally, the idle mixture screw ought to only be involving two and 3 turns out from it's seated placement. If backfiring occurs by way of the carburetor then adjust the idle combination screw out another one/8 turn. Easily tune and adjust your idle mixture without burning your hands or fumbling with a screwdriver. These Pit Posse carburetor adjusting tools work with. Tuning Tips & Manual Downloads. a lot of factors involved regarding exhaust system, air leaks, choke, etc. how do you adjust carb screws on Yamaha 2 stroke 25 h. At idle, adjust the idle mixture screw(s) until CO in the exhaust pipe is between 2-4%. and sometimes when i turn the truck off it still stalls and backfires. As spiral speed increases, more turbulence in the weir reduces the settling rate of the fines and the ability of the sand screw to move those fines up the incline. Usually turned by human fingers. Slow fuel jet:. Under normal circumstances, the idle mixture screw should be between 2 and 3 turns out. This jet along with the idle mix setting is primarily used up to about 3000-3500 rpm. A CV carburetor (Constant Velocity) incorporates a vacuum operated slide that varies the venturi size within the carburetor, thus maintaining a constant velocity. Slow Jet: Controls fuel mixture from 1/8th throttle opening to 1/4 throttle opening Needle jet (both the taper of the needle and the circlip position on the end): Controls fuel mixture through the midrange from 1/4 throttle opening. Be carefull not to drill too deep!. ) in that it is located upstream of the throttle valve (slide) and meters air; turning it counter-clockwise leans the mixture off idle. Idle adjustment of Keihin carbs can be annoying because the adjusting screw is somewhat hard to reach, in particular with stock air cleaners and large gas tanks. Turning screw clockwise will lean out mixture and lower idle, turning screw counter clockwise will richen mixture and raise idle. Adjusting the idle mixture screw out to far results in an overly rich, low RPM fuel mixture leading to poor gas mileage and carbon buildup in the combustion chamber. IDLE SPEED SCREW AIR BYPASS SCREW & JAM NUT Fig. Set the idle mixture screw halfway between the positions, or at the strongest idle. Remove the screws, then hold the assembly over a container to catch any fuel left in the bowls when you crack the bowl off the carb. You turn the air screw in to richen the mixture, and out to lean it. Screw the idle mixture screw in until it "bottoms out". 75 thread, size 68 (0. Buying Request Hub makes it simple, with just a few steps: post a Buying Request and when it’s approved, suppliers on our site can quote. The "pilot adjustment screw" may need a tweak. The air screw, will only effect idle mixture,(so slight at any other throttle setting as not to be a concern), so unless you have a flat spot off idle,ie it spits and or farts when you open the throttle, then there's little to be gained from adjusting the idle screw. Adjusting the mixture screw out too far will result in an overly rich, low RPM fuel mixture. Screw it back in until it again starts to stumble. Start bike, bring to operating temperature. How-to adjust the STOCK keihin NVK cv carb 1600rpm then slowy screw the idle mixture adjustment in until the idle drops 50 rpms then screw it out past the. Some people think you're supposed to turn the idle mixture screws all the way in, and then back them out 2 1/2 turns. Then turn the idle screw clockwise until the engine begins to grumble, keeping the positions in the mind. Idle and transfer ports provide a balanced fuel mixture during the transition period from stop to mid-range. So I went and finally threw the upgraded cam plate, oil pump, and cams in the old RK. but I really don't know how too. iFJF Motorcycle Idle Mixture Screw Kit for Harley Davidson CV Carburetors CVK Keihin carburetors The screw kit fits Harley-Davidson 90-06 CV Carburetors,CVK 34-36 Keihin Read more KiWAV Motorcycle Hand Tool idle mixture screw Carburetor Carb for Keihin CV36 CV 38. •Whenever intermediate jet change is made, idle mixture screw must be readjusted. You can unscrew it for cleaning but no need for that on a new carb. Note position. How do you adjust three cylinder gasoline engine. Repeat this process for all of the idle mixture screws. If the bike stalled while doing that go back to previous step and raise the idle speed a bit more. We then checked the cables as the bike warmed up and made the final mixture adjustment before blasting down the road to check things out. If necessary, make further adjustment on throttle stop screw (10) to obtain correct engine idling speed. Easily tune and adjust your idle mixture without burning your hands or fumbling with a screwdriver. Pilot or idle jet system. On this page we have pictured all the available Mikuni idle mixture and idle speed adjuster screws, plus the range of Mikuni choke (enrinchener) plungers we carry in stock. The optimum idle range can vary from 900-1200 rpms. however, it appeared that no matter what i had my idle speed at, changing the idle screw had no effect. The adjustment should be no more than an eighth or quarter turn. The carburetor on a motorcycle has an air/fuel mixture screw to adjust the amount of air going to the engine. Turn the idle stop screw counterclockwise in ¼ turn steps between trials to allow less air to flow through the throttle blade. Normally, the idle mixture screw ought to only be involving two and 3 turns out from it's seated placement. Doing one carb at a time, slowly unscrew mixture screw and take note if rising idle. Sands L-series Carburetor Idle Mixture Screw Spring Adjuster Adjustment Harley. Snap throttle open—engine should stumble. Repeat as necessary. Next we move onto jetting the carbs. So if i just wanted to lean it out a little which way do i need to turn the mixture screw. After putting the other carb together and putting in the new idle mixture needle, running it in until it seated, then backing out 1. I would guess around 700RPM. Bottom of enrichener well will. Adjust idle mixture by turning Idle Mixture Screw slowly clockwise until the engine runs poorly. Alpha Rider Pro Carb Rebuild Kit Mixture Screw For Keihin CV Carbs For Harley Big Twin 1990-1999, Twin Cam 1999-2006 & Sportster XL 883 1200 1988-2006 Allows for quick idle mixture with no tools Precise adjustment reduces emissions and helps to reduce off idle spit Knurled edge for easy grip Precision tip shape for maximum efficiency Requires. Sometimes a lean condition will cause a "hanging" idle that is slow to settle down to set idle speed. Make one adjustment only to the first screw. Getting back up isn't much better. If however, the engine is not idling around 1600 RPM on start up, the fast idle screw will need to be adjusted. > Carburetor Parts > Tilliotson MD119A and MD119B Carburetor Models. Step 7: Adjust idle mixture screw until you achieve a smooth idle. Where I live it's hot during the day & like 50 degee's at night when I ride & I live in a high altitude area (mountains) I don't whether this makes a different or not but some people say it does. Slowly turn the screw counter-clockwise until it runs smoothlyif you go too far the engine will start to stumble. CARBURETOR ADJUSTMENT PROCEDURE Idle Adjustment Procedure. If the bike stalled while doing that go back to previous step and raise the idle speed a bit more. turn the idle mixture screw in all the way until is seats (be gentle do not tighten the screw down. idla mixture screw adjustment for 1999 1200. Idle Carburetor Easy Air Fuel Mixture Screw For Keihin CV BT 90/06 TwinCAm with CV Carburetor Harley XL 88/06 Big Twin 1990/1999 2006 Harley CNC Adjusting Carb. Once we determined that leaning the mixture further was not increasing vacuum, we turned the other idle mixture screw in the same amount. Mikuni Flat Side Carb Tuning for Dummies rpm idle speed. Recheck the idle adjustment with the Uni-Syn and Tach meter. Note position. How to adjust the mixture screws on your carb. Idle Mixture Screws: By adjusting idle speed with the idle air adjusting screw, the mechanic must be aware of the following condition. an engine wont run on petrol alone it needs air to petrol mixture start the engine with the screw some way out warm it up next screw the screw in until the engine note starts to sound "wobbly and uneven" stop there and then unscrew(out)until the engine runs evenly add a quarter turn outwards and you should be near. Screwing it in further leans the idle mix, screwing it out richens the mixture. How To Adjust A Mikuni Carburetor Ehow - Keihin carb float adjustment trick! youtube, Just showing a little trick you can Harley CV Carb Diagram / Read More. What I'm not sure about here is whether I could have achived the same affect by opening up the idle balance screw. Tusk Carburetor Adjustment Screw Kit Blue KAWASAKI KDX200 1989-2006,KDX250 1991. This will also affect your idle speed. To reset the TPS, press the screwdriver icon (Active Settings) and then select TPS from the tabs towards the screen top. I can even adjust either sitting on the bike. an engine wont run on petrol alone it needs air to petrol mixture start the engine with the screw some way out warm it up next screw the screw in until the engine note starts to sound "wobbly and uneven" stop there and then unscrew(out)until the engine runs evenly add a quarter turn outwards and you should be near. Optimum air to fuel mixture (14 to 1) is called stoichiometric, which means: chemically balanced. 2- Start bike, bring to operating temperature. (note my brother rode my bike 2miles and in that time adjusted my idle down to what he thought it should be/sound like) After an awful ride of 150 miles through 5 small towns with lights that I nearly stalled out each stop. Rebuild the super E and when it was all running, I had it at about 1/2 enrichment. The screw is much farther into the hole than the one where it is stuck. Start the process of making sure your Harley or Indian motorcycle is safely standing upright and is properly supported to make sure it will not fall over. The two barrel has a load compensation screw in the center of the bottom stem; the usual setting is 2-3/4 turns out. ) in that it is located upstream of the throttle valve (slide) and meters air; turning it counter-clockwise leans the mixture off idle. Showcasing a big assortment of low speed idle 42 here online. The lowest or closed position occurs when the tension spring is coil-bound but, not tight. com FREE DELIVERY possible on eligible purchases. Set the idle adjusting needle for smooth idling. But the weird thing is I reset the mixture screws and at 2 1/2 turns in it dies and the idle keeps going up all the way up to 4+ turns out. If you have the idle RPM set too high, your idle mixture adjustment will be irrelevant. Now adjust the idle screw to a mixture by turning the screw so that the engine runs poorly. Turning the air screw out allows more air through the idle circuit, effectively leaning the idle mixture. If you have an external tachometer, connect it to the negative side of the ignition coil. Back the screw out to slightly richen the idle mixture (½ to 1-½ turns will do it). Adjust throttle stop screw (10) to make engine idle at desired speed with throttle closed. Idle Speed Screw, ½ turn clockwise from engagement point. You search Auto repair manual PDF wheres the idle screw on a 2002 sportster, if there are search results will appear below. I just need a benchmark to reference so I know I’m not going to far, either way, with the screw. A CV carburetor (Constant Velocity) incorporates a vacuum operated slide that varies the venturi size within the carburetor, thus maintaining a constant velocity. Cv-performance. After a couple of iterations, the engine should be running smoothly (controlled by mixture) and at a low idle. First, turn in the mixture screw until the engine dies or runs worse, then back out the screw (recommend turning ¼ to ½ turn at a time). Adjust throttle stop screw (10) to make engine idle at desired speed with throttle closed. For more information visit the Johns Motorcycle Parts site. Material: Die-cast. The idea here is to have the bike idling with the mixture screw turned all the way in. Just was hoping there was a way to adjust the idle that wasn't such a pain. Engine should not miss or surge at this adjustment position. Turn the engine off and let it cool until the choke is fully closed. Fuel to these three ports is supplied by the Idle Jet, and that fuel distribution is further modified by the idle air bleed (jet). The lowest or closed position occurs when the tension spring is coil-bound but, not tight. a lot of factors involved regarding exhaust system, air leaks, choke, etc.