Adjust the idle speed by locating the small spring-loaded screw which is usually located next to the throttle control. 10.227 0 Td A basic procedure is to start the saw, turn the screw clockwise until the engine begins to stall for lack of fuel, then back the screw off until the engine stalls because it has too much fuel. they could be wrong on the timing as well.my last carburated vehicel.the vacuum advnce was on the manifold side of the carb, so when the throttles opened, timing dropped.on some vehicles the vacuum advance is ported and responds as the article suggests. This often leads to reduced performance and poor fuel economy, which can quickly add up in cost if not addressed. If not, check for loose or corroded connections in the electrical system or fuel lines. If not, check for loose or corroded connections in the electrical system or fuel lines. New Taotao ATM50-A1 Bogs Down Under Throttle - ProBoards One of the most common scooter carburetor problems is a clogged or dirty carburetor. What the carburetor does is regulate the amount of fuel and air which are supplied to the engine. Step 4. These cams offer options relative to the amount of pump lift per degree of throttle opening. Pump cams are replaceable, and as you can see, they can have two, three or even one hole. Minor adjustments like these actually help a lot! | 49ccScoot.com Scooter Forums 49ccScoot.com Scooter Forums 4 Stroke Scooters And Mopeds 13 TaoTao 50cc scooter running adjusting carb. For a carb do a search on ebay for gy6 50cc carb and see what comes up, they`re normally available for around $30-$40. For example, in a higher altitude there is less air for your motor and the fuel-to-air mixture will be richer. 1 position for idle speeds below 900 rpm and suggests moving to the No. We get commissions for purchases made through links in this post. Carburetor Settings | Vespa V50 This could be caused by clogged air filter, broken carburetor, or build-up of fuel in the carburetor. The diaphragm is acted on by a series of levers initiated by a nylon eccentric located on the primary throttle linkage. Rotate the screw counter clockwise 90 degrees. If you have a tachometer, setting the speed is easy. Replace the spark plug and verify that the engine starts now. Conversely, when a much smaller nozzle size is desired, weve drilled these passages and then filled the opening with epoxy and then re-drilled the passage to a smaller size. Can A 5 Year Old Use A Scooter? This added lift equates to additional fuel delivered by a given throttle opening. Carburetor for Yamaha Zuma YW50 Scooter Moped Carb 2011-2002 2003 2004-2006 26 $49.58 $ 49 . Divide this number in half to find out where the optimal point is. and can draw , un metered fuel through the exl pump circuit. ;lvUq>m This is accomplished with the throttle wide open. 50cc scooter carburetor problems can occur for a variety of reasons. })hoZ>mqUaIX 6mau?5 h`Rj'UmETvTK,_w9\k\N-rxIkjW All of these things are slightly different.. Holley offers a fabulous (very comprehensive) pump tuning kit under part number 36-184. If you notice that your e-scooter isnt going as fast as it used to, and the carburetor seems to be working correctly, its a good idea to check it out.Many times, small issues with the carburetor can cause an e-scooter to not go as fast as it should. If youre experiencing this issue on your 50cc scooter, it may be time to take it into a mechanic for a tune-up or adjustment. Also, it can only run as mentioned with the air pilot screw fully screwed in. RSS Feed. Flush out all holes in the body of carburetor with the carburetor cleaner and then blow through them with the compressed air. If your carburetor has a stated size, such as 19mm or 17.5mm, use that as the venturi size. As we mentioned, this shot of fuel is only intended to prevent a lean hesitation. Check these out to see if they apply to your situation:1: Low Gas Pressure2: Bad Carburetor3: Clogged Carburetor4: Foul Air Filter5: Faulty Ignition Coil or Misfire. Carburetor adjustment does not require an engineering degree, but some mechanical ability is necessary. 49ccScoot.Com Scoot F.A.Q. One tuning point that will be stressed several times throughout this story is that the ideal accelerator pump tune is the least amount of fuel required to create optimal acceleration. Many products featured on this site were editorially chosen. Adjust the fuel-to-air ratio (FTA) by locating the slotted idle mixture screw near the air-cleaner side of the carburetor. Carburetor Synchronizer Tool Carburetor Replacement for 17.5mm - Amazon This port is deactivated due to low manifold vac. Pump shot should start immediately as throttle is moved as per the vac advance the author is wrong. Change your O2 sensors if your motorcycle has them. Rotate the screw counter clockwise 90 degrees. I agree to receive emails from RacingJunk.com. The ideal setting should be midway between these points. Air adjusting screw Back off 50 & 70cc models ~1 Turns 90cc models 1~1 Turns Idle Speed adjustment Adjusting idle screw to avoid engine stall 50 70 & 90cc models 1700 ~ 1900 RPM ETON America, LLC To do this, remove the air filter cover and unscrew the air filter. 24.445 0 Td If the engine persists with a slight hesitation off idle or the engine stumbles when the throttle is rapidly opened from curb idle, then the accelerator pump circuit is a great place to begin tuning efforts. Check if the needle is sticking in the carburetor. It shuts off at 0 vacuum high load. Finally, use a calculator or a piece of paper to divide the measured volume of air by the measured amount of fuel and write that number down as your adjustment setting for your carburetor. How To Tune Carburetors, Step By Step | Cycle World This is done on most scooters using a screw adjustment on the other side of the carburetor as shown below. Manufacturer Part Number: CBRT-50. If the engine is working properly, however, a 50cc scooter carburetor problems should not have an impact on the speed of the bike. This manual was designed specifically to help the novice and expert fix their chinese ATV. Raptor 50 carb, where is fuel mixture screw and idle screw How Much Power Does the 2022 Aprilia Tuareg 660 Make? The other adjustment you can make is to the low speed fuel/air ("mixture") ratio. The most likely culprit to a running rich problem is the . Check this to know How to Adjust Idle Speed for SXY MOTO Holeshot Mini Dirt Bike: Locate idle adjustment screw located on the carburetor, below the transmission. This capacity rating is not the amount of fuel delivered per full stroke of the accelerator pump system but instead is the volume after 10 strokes. manifold vacuum, NO amount of playing with the carb will get rid of the ]=-\ZY}q5V;:(=gno~s lc)ww#0x^XGp^Kz6OJ}6A*H=9Ec}R}imJSmYvt=/ Note: If you are unsure of the color of cam, or it has faded from use, each cam is also numbered. The nozzle or squirter size has no bearing on the volume delivered. Replace the cover and verify that the engine starts now. any help would be most thanked. A smaller nozzle like a 28 will merely create a longer duration shot of fuel versus a larger nozzle size. Vac advance should only add advance at light load part throttle. {v0uE*G U[(mk8vo k;GY>*>:;+*5N No. Then re-install the nozzle and test the circuit. Next, measure the volume of air that is coming into the carburetor (in cubic inches) and write it down. Fuel in the bowl feeds the accelerator pump reservoir through a one-way check valve. If you understand simply how this carburetor works, then adjust your carburetor as I explain in this manual you will soon have your ATV running smoothly. How to Adjust an Air Fuel Mixture Screw: 7 Steps (with Pictures) - WikiHow This can be easily adjusted with the spring-loaded bolt and nut arrangement on the pump linkage. pump and the arm,. Please note that each time the pump cam is replaced, the pump arm clearance must be verified. Carburetor Synchronizer Tool Carburetor Replacement for 17.5mm PHVA ED 2 Stroke Motorcycles Scooter 50cc Engine Adjustment Tool . Change the spark plugs if needed. Reproduction in whole or in part without permission is prohibited. To fix this problem, remove the fuel pump and clean the area around it with carb cleaner. This is a mechanical secondary carburetor with accelerator pumps on both the primary and secondary sides- often referred to as a double pumper. Among the two most commonly used accelerator pump components are the accelerator pump squirter or nozzle and the pump cam. $67.04 $ 67. 50cc Scooter Carburetor Fuel Line problems are common on 50cc scooters. An accelerator pump is not necessary on vacuum secondary carbs since secondary opening is actuated only when sufficient air velocity occurs on the primary side. If all of these fixes fail, replace the entire carburetor assembly. The Number 2 position delays hitting the peak cam lift on the eccentric adding lift later in throttle position. How-tos: Adjust Idle Speed for 50cc Mini Dirt Bike Modified on: Tue, May 24, 2022 at 7:59 PM. First thing to clean is the float bowl. It's right next to the throttle control which is connected to the twist grip on the right handlebar. The carburetor connects to the engine's intake manifold and features a large round shaped cap mounted on top. Clean your air filter. More common are these shooter screws a standard job with a Phillips head on the top and a hollow example with a flat blade screw slot on the bottom. Chinese Atv 50cc To 110cc Carburetor Repair Manual - Issuu Because timing of the fuel is crucial, the fuel needs to be injected as soon as the throttle begins to open. Actions Prev 1 2 Next In a pinch when a larger accelerator pump nozzle is not available, the holes can be drilled with a pin vise and small drill bit to a larger size. More: How To Derestrict A 50cc Scooter CDI? The shooter(s) is located in the carb body, just above the venturi. To fix this problem, remove the spark plug and clean the area around it with carb cleaner. According to the Holley book and my experience, the pump arm has, inherently, a bit of play. The screw adjustment (explained in the video) is used to fine tune this adjustment at idle speed only. Repositioning the pump cam with the small screw attachment to the Number 2 location will delay pump cam operation and may improve this situation. To fix this problem, disconnect the throttle cable and check for any obstructions in the air flow. This is your baseline, if you are not happy with the adjustments. Often, a tuner can fine-tune a pump shot by moving the accelerator pump cam mount from the No. The other adjustment you can make is to the low speed fuel/air ("mixture") ratio. Scooters are a, A 50cc scooter CDI is a great way to get around town. To do this, remove the air filter cover and unscrew the air filter. How To Adjust A Poulan Chainsaw Carburetor - Easy And Quick Top Rated Seller. In operation, the accelerator pump is connected by a linkage to the throttle butterfly shaft. When a hesitation occurs, the oft-used solution is to add more fuel with a larger nozzle or with more lift from a taller pump cam. check for how the rubber sits into that area. By the way, you can also purchase any of the components separately. A 50cc scooter carburetor is a small, simple engine that helps power the scooter. This could be due to an empty fuel tank, worn out piston rings, or a clogged air filter. Free shipping for many products! Holley sells an accelerator pump cam assortment kit with 8 cams with seven that offer different lift shapes to custom-trim the accelerator pump circuit. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); NHRAs Pro Stock Class gets First All-Star Callout at Chicago this Month, John Force Racing Announces 2023 Lineup, New Crew Chief, NHRA FallNationals Prove Everything is Bigger in Texas, Its time to VOTE for Round Three of the RacingJunk September Drag Duel Showdown, 1974 CORVETTE 454/502 4-Speed Convertible, Not Quite Automatic: Transmission Tips Part 2. For GY6 50cc 100cc 20mm 139QMB 139QMA Scooter Moped ATV Big Bore Carb Carburetor. This manual includes Carburetor fundamentals, Carburetor Tuning and rebuilding. The atomized air/fuel mixture then passes into the throat of the carburetor. Holley offers a selection of pump cams under part number 20-12. The publisher chose not to allow downloads for this publication. Next, measure how much fuel is in the tank (in ounces) and write it down as well. 36.461 0 Td An Octane Media, LLC Publication. Replace the carburetor and verify that the engine starts now. This is usually caused by a clogged fuel filter or dirty carburetor bowl. The first step in tuning the accelerator pump circuit is to ensure the clearance on the pump cam arm is correct. Set contains: 21 Teeth Spline, 7-Teeth Spline, Single D, Double D, Pac Man, and 4mm Hexagon. 2 location. And the damn thing will pass an Emissions Test. These environmental factors determine how the fuel-to-air mixture runs through the carburetor. Once the carburetor is bolted to your engine, it will probably work extremely well. --> Slightly turn in the fuel mix needle to adjust the mixture accordingly. Opps./ I am new to these things. Youll come across two very common shooters (squirters or nozzles). Carburetor Adjustment Screw Adjust Idle Up OR Down To Keep - YouTube When the engine is cold the automatic choke is in operation and that can change the idle speed. As you can see, this is a number 40 shooter. The nylon cam (1) on the primary linkage pushes upward on the follower, transferring that movement through the linkage (2) to the pump arm (3) that pushes upward on the diaphragm located inside the 30cc housing (4). It is the mechanical advance that adds the timing needed. How To: Idle mixture screw adjustment - The Junk Man's Adventures Answer (1 of 3): Probably not. If the engine turns over but doesnt seem to be getting any air into the cylinders, this might be due to a clogged or worn out carburetor. How to Adjust a 50cc Carburetor By Tamara Walton Carburetor adjustment does not require an engineering degree, but some mechanical ability is necessary. This discussion is aimed at the accelerator pump circuit. How to Adjust a 50cc Carburetor - Gone Outdoors This is the float bowl side of the primary metering block. See the text for details. Harley Releases Ride Routes to 120th Anniversary Festival, LiveWire Announces New S2 Del Mar Pricing and Release Dates. Spring Clearance Sale While Supplies Last! Some have an adjustable air/fuel mixture, some do not.. Count how many turns this takes. Inside this vertical passage is a check valve that retains fuel above the float level so that there is fuel present as soon as the circuit is activated. How to Clean a Dirt Bike Carburetor? - MotoShark.com Clearance at the lever will create a hesitation. (ETON ) Tj Reattach fuel tank and top cover and start your scooter up to ensure proper function. 2) no mention of motor vacuum / va fuel level ,. This video should get you in the ball park.If you want to go the new carb route, I've been very happy with the couple PZ20 carbs I've purchased. One major issue with these small scooters is that the carburetors can sometimes cause them to idle badly. The stamped number corresponds with the diameter of the shooter hole size. Stay up to date with the latest releases, events, promotions and more. Fuel from the accelerator pump housing enters the lower right side of the metering block (arrow) and travels diagonally upward to meet the vertical accelerator pump nozzle passage. If the original carb was maxed out on flow with the 50cc cylinder, then you might. You may also have seen references to a larger, 50cc pump that can be added. Be sure to reattach the fuel cap before screwing back on top of carburetor. The main metering circuit does not deliver fuel on an instantaneous basis. Worse, it may drop down inside the intake manifold where it could cause engine damage. How and Why to Adjust a Holley Carburetor Accelerator Pump At very slow throttle openings, the accelerator pump delivers very little fuel because the off-idle transfer circuit can accommodate this condition. Once youve made your adjustment, screw in your air filter cover and reattach your bikes air filter. Sitemap| How do I adjust the carburetor on a 2005 Honda CRF50 Performance engines are like people each one is a little bit different. Be sure to remove all dirt, dust, and debris from both parts. Do not attempt to test with the nozzle removed as the pump shot will launch the check valve somewhere you will never find it! %Mn(GR44GsiSKf>32"](Z4}ez687}JXGs)SjI5BoU5|iL8c} %}#wWKq\MZ+!xP1Q x(?=Hz)>c.4c%tP3EzG$Fo@Px2RE7-$yT)^5Fqyk*ZFEPGFja}Fn+&rP\$"ZtEdaihP"))LjG08%$m(l{` m+LwT19T9[Tpd^h6%ka}h;3s/|x7u;lu9t@@|8rpIUgH462/,5RYjd(>V;ISPJ kH*A%Mz=&b=u.+>wI>>o You may need to go back to the idle speed screw to lower the idle speed if it's now too fast. The fuel also has to be atomized as much as possible (i.e. "Double pumper" or mechanical secondary carbs employ an accelerator pump on both the primary and secondary sides. Turn the screw counter clockwise in turn increments until the engine revs back up and drops again. What Are 50cc Scooter Carburetor Problems? [Fix In Right Way] this is to avoid bottoming the diaphragm. (all ) Tj Ported only operates when throttle plate lightly uncovers the vac port in the plate bore. How Much Power Does the 2023 Ducati Monster SP Make? This could be caused by a clogged air filter, clogged fuel filter, or dirty carburetor bowl. Tightening or loosening the nut on the screw that passes through the spring on the pump arm sets clearance. Adjust the high-speed jet to achieve maximum allowed RPMs Yes, a 5 year old can use a scooter. There are many different things that can go wrong with a carburetor, so it is important to have it checked out by a mechanic if you notice that your engine is not running correctly. 2008 ScooterFocus.com | If you give it 1/3 to almost 1/2 throttle it runs down the road good, even manages 25-28 mph. Everything you need to know to understand and tune carburetors. Need to adjust carb on 50cc suzuki quad master - Fixya Idle mixture adjustment (air OR fuel screw adjustment) Carburetor thejunkman 1.9M views 11 years ago TaoTao 125cc atv free speed/power modifications Anything With An Engine 121K views 4 years. Clean any areas that are blocked and replace any parts that need attention. The pointy side goes down. The accelerator pump circuit's primary task is to compensate for rapid throttle transitions from a near-idle, especially under high engine load as with a drag-strip style start. 04. Hydro carbons are drastically reduced. Turn the screw back to the baseline, start the engine and let it warm up for five to ten minutes. When replacing shooters, be careful if the carburetor is off the car and you tip it upside down. Would you have to get a larger carburetor after upgrading a 50cc moped Part 2 of a 4 part video detailing all of the basic settings and adjustments of the carburetors found on Minarelli / Jog / 1E40QMB powered 50-90cc scooters and youth ATVs. Many 50cc scooters use a carburetor that relies on air/fuel mixture to turn the engine. If your carb has a SCREW near the INTAKE MANIFOLD side the Carb has a FUEL RATIO MIXTURE Adjustment screw. But before we get into those pieces, its always important to make sure the current system is working properly. This should require only a slight adjustment to minimize the clearance. Or, it may need some additional tuning to allow it to perform its best. (We Road Them All! Youll find the Holley is a very easy carburetor to adjust that you can become proficient in almost no time. If you don't, you want to set the speed to a low idle. This ensures there is sufficient velocity to instantly trigger fuel flow from the secondary boosters. 50cc scooters are a fun, inexpensive way to get around town, but carburetor problems are common. Otherwise the shot begins before the butterflies are open enough and causes a momentary lag in performance. Another idea might be to increase both the primary and secondary sizes rather than adding all the additional fuel to just the primary side. Most 50cc scooters come with a carburetor that is adjustable. Tj Brand New. How to tune a carburetor in a GY6 chinese scooter 150 or 50 cc 13 TaoTao 50cc scooter running adjusting carb. - ProBoards To fix this problem, remove the carburetor and clean the area around it with carb cleaner. This will delay the pump shot into the engine and can cause a hesitation. In This video we are cleaning and rebuilding a Honda CRF50 carburetor assembly.Also more common repairs with the CRF/XR50 check out: https://youtu.be/kOv8nhHUsq4https://youtu.be/wgs_Qz-WnuYhttps://youtu.be/qg5MyzUKefIPatreon https://www.patreon.com/midnebraskamotorsportsInstagram https://www.instagram.com/midnebraskamotorsports Check out my eBay store at stores.ebay.com/midnebraskamotorsportsShop for parts at: midnebraskamotorsports.comWe Disassemble: Clutch Head Cover Cylinder Piston Stator Points Rotor Magneto Generator Alternator Coil Camshaft Cam Chain Tensioner Rocker Electrical Cases Bottom End Case Set Transmission Shift Drum Fork Gear Shaft Flywheel Starter Idler Clutches Bearings U Joint Yoke Driveshaft Shaft Float Main Jet Bowl Slide Needle Seat Intake Assembly Drag Race 101, News, Slideshow, Tech Tips The single hole job is for a 50-cc pump, while the others are used on 30 cc pumps. If it goes down, turn it back to where you started since you didn't need any adjustment! look for how smooth the metal . 6gCk}qVz>s [(>F80l\s|S%$V/f@:cC, sG6~kXs})HU532^\V%H2Is ~~=}v?` j}WT[mjm.\R4g6RC_^- j6[[XsfO+O}r{~A0j^IrSUb{];Z MtV&;jWpw$GkE=;}?. If this is the case, you may need to replace the carburetor. For even aggressive, high-horsepower applications, it would be extremely rare for a tuner to find a situation where a street car was in need of the extra volume of the 50cc pump on a 4150 style Holley carb. OPTIMAL Setup: Brown to Grayish: Electrode showing a clean and brown to grayish colored surface. Tuning Tips for Crf 50 Carburetor | PlanetMinis Forums If your ATV Carburetor needs rebuilding follow my step by step procedure and in less than an hour, you or your child will be riding. 21.785 0 Td (Surprising Answer! When properly adjusted, there will be no hesitation or stumble when the throttle is opened. Quora - A place to share knowledge and better understand the world New carburetor: https://amzn.to/2I6HrIpJets kit: https://amzn.to/2jnt1WEAir/fuel gauge: https://amzn.to/2HM4Tr2Please support my channel by using the affilia. On most scooters from 50cc to 250cc, this will be somewhere in the 1500-2000rpm region. t:w>p{>ky8v{vd=osSN#?t+Y8R}s7{(@hO(> ms-Re%868!;rm*n8 Signs of an oil leak can include an increase in oil consumption, low engine performance, and smoke coming from the exhaust. If you do not have a tachometer, set it for a low idle speed; not so slow that the engine stumbles or stalls, but not so fast that the clutch won't try to engage and move the vehicle forward. Shooters are stamped with a number on the body. ). The accelerator pump circuit addresses this condition by adding the additional fuel to prevent that momentary lean air-fuel ratio.. Lets first describe exactly how the accelerator pump circuit works and then we can get into tuning. Replace air filter if necessary. In either case, fixing the problem could require some basic scooter repair skills and tools. the exl pump ,. The pump adjustment should be at 0 lash with throttle at idle position. If not, check for loose or corroded connections in the electrical system or fuel lines. Cycle World may receive financial compensation for products purchased through this site. =" ;(]@Wq}678XZv\zmVDn#rcf6$7w_4,kgH}^Q6Ti[]3m76Y3$}Smt5K^]k9k\.F[}D(>6X/scJx} 5>K^Zv;MP^csP]\']CZ9foJUqn}yyuUT=hHu?+=i[vx?A[SR[1{u:D2w6=O%;jJwVuSGs[dmCH]~P3_=6bG_Lkw:VFCeo2~*MOSHmGhKb,oO?S!FnK_mAUV.R9'3SK#S?N8mt*='u6\>,)P[MhJ(ww+qtkP}x7{ M)*{~)3P6m h_'[UCA)|nU.oUKjuLP\ 4U{$^](&4I.% EJINtjc9t(3DNlS}n&n`=[]g\ko-;9Kv[d{:NU0{\ 5nW{?9 7HjjXN./*Cvqx%E1{XC$5:]^hVNK} Z>I|+JR[I%)$R;^Z^\OOgZ Y:0n{E jWx?Uzv=Qk=[]OSsv[}N?qu}m[{ wYKSN}4TMN?/mvC\8xQ;6{ko)z8s{|JMAk.OE HB=!_ The mix is optimally adjusted and the engine is getting just enough petrol in relation to air. Next, measure the volume of air that is coming into the carburetor (in cubic inches) and write it down. {Y U5*oim'>giU~r\:t sB{B ')1|sIJrN!57e,V/qVF~j+Bq 6 h9m:p!G,ixui`qsyW]58IcgC_hV}F}e\}RDX;R46|9kUftL\NgsR^k2\*/=3` v4qs-mu^1+}hB\Q\5|}X]9s?5c50/`#&2/k~sB/ 2J[etK->t u`7);[UjmgZ5 6_ik7O Vl4{J^(sf/L;{9}UYysZ{Ms%I)JdTRINTs2=V}%j% foB,3kzN-/UxCl{[S9I,C}'(1>bkdmb8nwKw9T8xucI *c];\=}'wb_]mSgSRW$4-'je~rN{i7+*aN?7w8+k@6jsi 9*~w~jP"xB&r\*vr%mUc3] S1 Then, see if the bike's ignition system is working well and warm the engine up. ':G( Mechanical secondary Holley carbs (right) do require a secondary accelerator pump circuit since the secondaries can open even at very low engine speeds. Coolest Sportbikes of the 90s: Harley-Davidson VR1000, Single-cylinder Triumphs To Be Launched in June, CFMoto Working on Girder Fork for Next Big Tourer, Harley-Davidson Teases All-New 2023 CVO Street Glide, Can-Am Supports This Years International Female Ride Day. The fuel/air ratio at higher speeds is set by the jets inside the carburetor and to get at them the carburetor has be be removed and disassembled. So with a Holley 750 cfm 0-3310 carburetor or one of the hundreds of other models, these carburetors are intentionally built for a generic application. and the atomizers pulling un metered fuel.. through, over the top of that circuit. The carburetor venturi is the smallest part of your carburetor's bore, which is difficult to measure and is stated in a number that reflects the diameter of a circle that matches the area of the venturi since many venturis are oval shaped rather than round. ET If you're looking to troubleshoot a 50cc scooter carburetor problem, you'll want to adjust the air/fuel mixture first. If the throttle is slammed open, it takes a moment or two for the main metering circuit to respond to this change in throttle position. $$''$$53335;;;;;;;;;; %% ## ((%%((22022;;;;;;;;;; " ? Many people believe that a 50cc scooter carburetor problems make the scooter slow to accelerate. The Pilot jet only controls the air/fuel mixture at idle and low, off idle, throttle openings. 50cc scooter carburetor problems can be caused by a number of things, such as incorrect fuel levels or clogged jets. Take a 5 or 10 minute ride first.
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