I think it would be best to start by inspecting the ignition system. https://www.buggydepot.com/model/14/1/crossfire-150-parts.html. b. Re-open the high speed needle 1/8th of a turn and take another test run or two to make sure that you don't feel the bog and that the engine is running well. How to adjust a carburetor, jetting and mixture explained! between high, higher and even higher pitches. Above is a picture of a typical GY6 engine carburetor and the view is that from the right side of most engine configurations on 150cc Chinese scooters. For very dusty and dirty off road conditions on go kart applications, an oiled Uni foam filter is probably the best way to go. If it goes down, turn the screw back 1/8th turn to where it started, then 1/8 turn in the other direction and see if the idle speed goes up or down. Find a place roughly halfway between those rough idles as your ideal adjustment. After that it would not start and driving lights, come on but go out. Remove choke assembly from the choke holder on the side of the carburetor. We will not be held liable for the outcomes of your mod projects. Using a flat-blade screwdriver, remove both of the jets circled in the center. BARrOJ_ng %'|NF^t@w Try these two things if your Buddy is not running or hard to start.Parts Used: www.scooterwest.comBattery Part # YTX7A-BShttps://www.scooterwest.com/yuasa-ytx7a-bs-battery-buddy-people-150-ytx7a-bs.htmlFuel Line \u0026 Filter: GP65212010004https://www.scooterwest.com/buddy-125-150-with-iron-tank-fuel-filter-assembly-out-of-stock-with-genuine-08-30-17-01-59-13-jpc.htmlFuel Tap (Petcock): GP6523000000https://www.scooterwest.com/buddy-50-125-150-fuel-tap.html perhaps your Chinese scooter! All trademarks on the site are the property of their respective owners. Your email address will not be published. If you can help me that would be good. If you find your top-end RPM's have fallen off a bit, or if you experience lagging or surging, it is probably time to re-adjust the carb jets. Click here for high performance exhausts. Click here for high performance spark plugs. If the idle changes after you spray the WD-40, there is an air leak. Turn the Air/Fuel Mixture COUNTER CLOCKWISE 1/4 turn and wait about 30 seconds to allow the engine to respond to the new setting. Replace battery and clean a carburetor on a Genuine Buddy 125 or 150 Scooter. Click here for high performance carburetors. Above is a picture of a typical GY6 engine carburetor and the view is that from the right side of most engine configurations on 150cc Chinese scooters. You can get a new one for $50-$60, so if you can't make your scooter run smoothly and you don't like the idea of taking the carburetor apart, you can always replace it! Open the throttle lever to full blast. We bought out all of Tomberlins inventory, and have nearly all parts available on our main site. Rotate the High jet counter-clockwise to 1 and 1/4 turns open. On most scooters from 50cc to 250cc, this will be somewhere in the 1500-2000rpm region. Assuming the engine was completely warmed up and the auto-choke circuit is working properly, its time to remove the carb and give it a thorough cleaning or replace it with a new one. The instant you twist the throttle, the valve opens and starts letting fuel into the motor. If the RPMs go up, repeat step 1 in turn increments until the RPMs begin to drop. It comes standard with a CVK style carburetor usually in a 24mm or 26mm intake size. A two stroke engine gets it oil lubrication from the gas and if there is less gas in the mixture, that means that less oil is making it to the engine. Let the engine idle and turn your pilot screw clockwise (or in) until the idle gets rough. We have limited expensive using it, but hope to have more exposure to it on an upcoming build. I have changed spark plug,drained fuel,cleaned carburetor. That will give us a place to start. Keihin design carburetors are a well tried and tested design developed in Japan (Keihin is a region near Tokyo). It idles great but when I try to accelerate it backfires and sputters. You should see light coming from the end of each one. GY6 Swapping The Honda Ruckus: What To Expect From Your Swap, How to use an American-made BDX wiring harness on your 150cc Chinese engine. Take note of how float internals are arranged. There are measurements you can also use but that is the "seat of the pants . The buzzing of the RPM at all times can be annoying to some people. I see the gold barb is for fuel, but I have two other hoses that I am not sure where they go. 3. If I touch wires together it shuts off but not from switch. The pilot screw adjusts the fuel mixture when starting up from cold. Plug and Play! Close the jet by turning it clockwise slightly, and then ride-test. PageSpeed score of Adjusting Air/Fuel Mixture page. Because carburetors have a number of overlapping systems, each with its own adjustment range, tuning them to give the desired mixture over the engine's operating rpm is a step-by-step process. A lean condition will run hotter because the lean mixture burns at a higher temperature and because less lubrication is making it into the engine. It is a more expensive carb and has the same great throttle response but is a little more fickle when it comes to tuning and the jetting only comes in Mikuni specific sizes. We also carry parts for the Punisher 150cc models. Hey Anders, New carburetor: https://amzn.to/2I6HrIpJets kit: https://amzn.to/2jnt1WEAir/fuel gauge: https://amzn.to/2HM4Tr2Please support my channel by using the affilia. The first is the adjustment of the idle speed. "Maikuni" Carb. Also, it reduces fuel consumption by increasing the burning efficiency! There's a small spring loaded screw which adjusts the idle speed. In that case, use a single strand of copper from an electrical wire to clean out the blockage. It has a 1,200(F) higher melting point than platinum and conducts electricity better. Adjust the high jet until you get maximum RPMs (the highest pitch noise). This adjusts the air-fuel mixture going into your engine. The idle screw controls the engine speed when idling, while the low speed and high speed screws control fuel mixture at those speeds. This Japanese manufactured, manual choke PD24J carburetor is the replacement part for many 4-stroke Chinese ATVs, Dirt Bikes, Go Karts and Scooters. Regardless of what machine you own, performance upgrades can help increase the power output (and fun factor) of your go kart or scooter! So the basic procedure is to set the fuel/air mixture to give you the fastest idle, then use the idle speed adjustment to set the speed to the lowest rpm that gives you smooth running. A richer mixture has a lower air: fuel ratio, while a leaner one has a higher one. If you can put a couple blocks under the engine to raise the rear wheel slightly off the ground, you can just adjust the idle speed until the engine is running smoothly, but the rear wheel doesnt turn until you give it a little bit of throttle. I found mine on Ebay. Most mod kits for gas scooters will also come with new parts for the CVT. have yerf m#34911. In fact, when we pulled it off and opened it, took all of the jets out and cleaned them anyway, it was clean, but still leaks gas when we run the ATV. I hear these things are really restricted for CA. Spray carburetor cleaner through the three passages that are circled. BuggyDepot.com Articles and Guides to the GY6 150cc. Weigh your stock weights using a precision scale and select new rollers weights either lighter or heavier - depending how you want to change your engine RPM range. If you don't, you want to set the speed to a low idle. Rotate the low jet counter-clockwise to approx 1 and 3/8 turns open. The most troublesome piece is the longer pilot jet which has a very narrow internal passage. Adjust the idle-mixture screw to maximize idle speed, then adjust the idle-air bypass or idle speed back down to a smooth 600-800 RPM. The rule of thumb is; Engine side of carb-fuel. After each ride, turn off the fuel valve to and let the the engine idle off of theremaining fuel in the carburetor. These may be included in some mod kits for gas scooters and go karts, or you can often buy one by itself. Carburetor description: PD24J Manual choke 1) CVT UPGRADES for 150cc GY6 ENGINES: Recalibrate your CVT (Continuously Variable Transmission). We are checking the PageSpeed score of your Adjusting Air/Fuel Mixture page. To ensure max performance and engine life, follow this procedure: While tuning by ear with freewheeling is relatively easy, it is not as accurate as tuning the scooter while you ride it. 2) TO MAKE THE AIR/FUEL MIXTURE LEANER: Remove the float pin, push it through using a pointed tool. Notify me of follow-up comments by email. It would probably be best for you to bring in your stock jet so it can be visually matched with the a new one that is the right style. Mixture, Jetting adjustments and how the carburetor works explained! If no improvement, repeat until desired results are achieved. It is a self regulating system which is what makes the stock CVK so dependable and flexible. http://www.buggydepot.com/buggy-tech-center/read/150cc/0/9/howhit-150cc-gy6-vacuum-line-diagram.html, Thanks Travis. Its a 07 Tank urban racer 150. Click here for high performance intake manifolds. None of these things are good. Mixture, Jetting adjustments and how the. The float bowl should be oriented topside. Stuttering at full throttle The fuel also has to be atomized as much as possible (i.e. Adjusting the float level may fix that. The stock GY6 can be tuned by changing the main or pilot jets and also via adjustment of the air/fuel screw. Im not sure if you guys sell these. Oil Cooler - Extend the life of your GY6 motor and add on this simple to install. Increasing air flow through an engine is the goal. It should go without saying, but the fuel and vacuum hoses also need to be in good condition and hooked up the right way. The oil cooler includes everything you need in the box. 108 0 obj <>/Filter/FlateDecode/ID[]/Index[74 65]/Info 73 0 R/Length 148/Prev 744157/Root 75 0 R/Size 139/Type/XRef/W[1 3 1]>>stream i have a crossfire 150r and i got the carb upgrade and now i neex to cut off some of the throttle cable or does anyone know where i can get the right part. Whichever carb you decide to use on your build, remember proper tuning and adjusting will allow you to realize the full potential of the carburetor. When the engine is cold the automatic choke is in operation and that can change the idle speed. 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. Visit my affiliate linkshttp://www.thejunkmanadv.com/current-sponsors.html0:00 - Intro0:22 - Carburetor function and theory of operation2:51 - Carburetor demonstration3:29 - Idle mixture adjustment explained3:59 - Pilot jet adjustment explained4:19 - Pilot jet, Jet needle and Main jet operation explained4:22 - Jet needle and Main jet operation explained4:43 - Main jet operation explained5:08 - Enrichment or Choke for cold starting explained5:52 - Keihin FCR carburetor explained6:51 - Keihin FCR accelerator pump operation explained7:48 - Keihin FCR hot start operation explained Take the guesswork out of selecting the right-sized jets for your motorcycle or ATV. A lot of scooters and go karts are powered by a 150cc engine based on the Honda GY6 scooter engine design. Check that the brake fluid reservoir is horizontal and that the fluid level is: Front brake above the LOWER level mark. Lighter roller weights will increase overall engine RPM. Extra diameter and aggressive ramp design for top performance. this only controls idle to 1/4 throttle Click here to add your own comments Join in and write your own page! I havent been able to find parts not sure what site to go to. Roller weights can be found for the 150cc GY6 in the range of probably 8 - 15 grams or so. When tuned to the level of the highest performance, a two stroke engine will be running in a slightly lean(too much air and too little gas) condition. Here are 5 ways to find the answers you need: Check out our Repair FAQs below Scan the questions/answers on this page Scan the older repair questions/answers in our archives Search our question/answer database: Ask your unique question using the form below Common Questions About Scooter Repair & Maintenance These compromises usually limit efficiency and performance potential of an engine. @vN.0#`sSln7j00>{`MFFA#'vwG:4~bH2 Q Also how to locate and adjust it. GY6 Big Bore & Stroker Explanation. When tuning, make sure that you start overly rich in order to ensure no damage will be done to the engine before the best tune is discovered. But flat or round slide carbs tend to be less complicated than CVK style carbs so they are easy to work on and tune. If it still won't start after that, it's time to clean or replace the carb. 2) FUEL SYSTEM UPGRADES for 150cc GY6 ENGINES: Main Jets - Re-jet your carburetor! If there's any one component that's more likely to go out of adjustment on your scooter (especially 2. The spray should dissolve and remove any blockages caused by old gasoline. We highly recommend you consult with certified or skilled mechanics or technicians before proceeding. UNI Air Filter - The stock airbox can be eliminated and a high flow air filter like a K&N style or UNI foam filter can be used. In addition to the front driver pulley, the rear driver pulley can also be recalibrated with different clutch shoe springs to vary clutch engagement RPM, and also the main driven compression spring can be changed to a stiffer spring which also effectively boosts engine RPM under driving conditions. If your engine idles very fast and stops running if you attempt to slow the idle, you may have an air leak in your intake. hb```e``D@(q ,00p/Sd@OeI(NO|:CKtz+!s A must have for riding in hot summers when air cooling the motor is not enough. They come in a raw finish and a more sporty looking black in many different sizes from 24mm all the way up to 30mm. A popular and inexpensive flat slide carb and a Small Fast Things favorite is the OKO brand of flat slide carbs. 150cc 3-wire Ignition Switch Pinout (Crossfire 150 and 150R), BDX Heavy Duty GY6 Mount for Ruckus Installation Guide, GY6 Carburetor Float Level Adjustment Guide. Click here for high performance intake manifolds. 25\ ms<1CI#_ b*wPAPd` Pgg Runs great. The other adjustment you can make is to the low speed fuel/air ("mixture") ratio. Important! The. This can cause bogging over bumpy terrain and dying out when coming to a stop. This would be considered a clone or knock off carb. The scooter shown in this video is a 150CC/157QMJ/Long Ca. Modifying your scooter engine for additional airflow will NOT increase performance, UNLESS you have the appropriate amount of fuel to go along with it to produce more power. There are a number of ways that this can be done. Whether you have a car or bike, your carburetor has a mixture screw, Motorcyclist reports. Otherwise, your fuel filter or carburetor could be clogged. Find the correct side of the mirror connector. 1. Start your scooter and let it run for 10 minutes to get the engine up to operating temperature and allow the auto-choke (enricher) to close completely. A carburetor that is tuned correctly will both protect your engine and induce optimal performance. This is done on most scooters using a screw adjustment on the other side of the carburetor as shown below. Got it fixed. ADJUST YOUR FUEL RATIO: 1. Remove the carburetor from the engine by loosening the clamp on the intake inlet manifold. It stabilizes the current allowing for quicker firing during high RPM's. Turn the Fuel Ratio Screw Counter Clockwise 1/4 and wait 10-15 seconds to allow the engine to catch up with the new setting. I am fabricating and going to install a K&N filter. Recalibrate your CVT (Continuously Variable Transmission). Lift the front of the ATV and attach the two front tires. We had to hold the throttle wide open to get it to start. Lighter scooters may want to have a little heavier roller weights. Move the assembly to the side. 30mm Carburetor - If you really want to bring your 150cc GY6 engine to life, this will do it! The basic idea of adjusting the CVK carb is to set the air/fuel mixture screw to provide the highest idle setting possible. The valves must be adjusted properly (.004 intake, .005 exhaust) and you must have a strong spark. The carb bowl has twist off screws so I am going to drill them out. Here's a freebiewe personally run a 30mm OKO carb with 120 main jet and a 38 pilot on a shop built 171cc GY6 motor. If you have a tachometer, setting the speed is easy. This also translates to 80 to 100 kmh. These changes will effectively slow down the upshift of the CVT and allow the engine to rev up higher and have better torque under driving conditions. Many we talk to attribute this to ethanol content in the gasoline. To raise the float level: Carefully bend the tab upwards slightly. Required fields are marked *. Heavier roller weights decrease engine RPM. Please read our ignition troubleshooting guide (link below), and reply in the comments section there with the voltages you saw at each step. Twist the pin with pliers to secure the bolt on the tire. Can you help me with info. If you have a 5-wire ignition switch (Blade, Kinroad, Twister Hammerhead, Carter Bros., etc), be sure to come back to the kart to turn your key back to the off position, or your battery could drain. You will need to drain the bowl, disconnect the fuel hose, throttle cable, vacuum hoses if equipped, unhook the choke or enricher/bystarter, disconnect the oil injection hose if equipped (2T), and remove the carburetor from the air box or filter and the intake. Use a pointed tool to push out the . The stock CVK style carb features a diaphragm needle valve that rises and lowers depending on vacuum pressure and allows fuel to enter the engine automatically. Just remember, that too lean of an air/fuel mixture can increase engine temperatures and cause engine damage. It's easy to do. It's located on the side of the carb and adjust either air- or fuel-flow, depending on its position. Recalibrating your CVT modification will not increase the actual power output, but it has a high performance-to-cost ratio. LED Lights - By using these LED lights, you are conserving battery usage. So, what exactly are we adjusting, and why are we adjusting it? What the carburetor does is regulate the amount of fuel and air which are supplied to the engine. Adjusting the float level may fix that. This GY6 carburetor inspection video should help you tremendously. Locate the low and high RPM jets on the side of the carb - they are usually marked with a L and a H. Turn both jets completely clockwise ( to the fully closed position). The popular GY6 150cc motor that is swapped into Honda Ruckuses and found in many common Chinese scooters is a carburetor operated engine. There is a lot to be said about CVT tuning, but to simplify many people can probably benefit from slightly lighter roller weights in the front driver pulley and also a stiffer torque (compression spring) in the rear driven pulley. I bought my daughter a 150CC Polaris rzr copy. Click here for racing performance clutch and bell kits. thejunkman 31.8K subscribers Subscribe 881K views 5 years ago How to adjust a carburetor. Because your scooters and some go karts use a relatively small battery, it is vital that you reduce your electrical consumption since some of your other high performance gadgets will consume most of it. During adjustments, the float should be oriented the same way as it came out of the carburetor. The only small carbs I have ever seen that used an air-adjustment low-speed circuit, were Hitachi's. They were used on some Yamaha models for about 10 years. I hope not to much. Honda sold four significantly different versions of the Elite 125/150 scooter over its short four year run: Elite 125, Elite 150, Elite 150D and the all new1987 Elite 150. Heres my write-up and diagram that will help with line routing. So, if you have a go kart, then check out the mod kits for gas scooters because many of the parts may work on your go kart applications. To go faster you need more fuel and more air and they must be in the right proportion. Replace battery and clean a carburetor on a Genuine Buddy 125 or 150 Scooter. There's a small spring loaded screw which adjusts the idle speed. Is your ride bogging out over bumps, or dying when coming to a stop? If your engine stutters at full throttle and cannot reach full RPMs, the high jet "H" is too far open. 2008 ScooterFocus.com | The needle should be clearly visible. Be sure to bend the tab only slightly. 3. Click here for high performance carburetors. Pulley or MRP. There are different specific engine designs used on these go karts and scooters, but the principles on this page will also apply to many different engines. It can feel like driving your 5-speed car in 3rd gear on the freeway. By conquerall There are many different factors that determine how fast a 150cc scooter can go. Click here for racing performance variator kits. If the scooter idles well and runs fine at low speed, but has problems at high speed, the problem may lie inside the carburetor with the main jet. Note: A little gas may spill out of the carburetors overflow tube when you flip it over to get to the float bowl. I have a Tomberlin 150 Crossfire with a Howhit engine. endstream endobj startxref Turn the Air/Fuel Mixture CLOCKWISE 1/4 turn and wait about 30 seconds to allow the engine to respond to the new setting. Now I cant shut it off. Many of the GY6 scooter engines seem to use a Keihin style CV carburetor (24mm), so check with a motorcycle shop or motorcycle supply source that sells carb jets. We hope you enjoyed this guide to GY6 carbs. Method 1 Adjusting the Air and Fuel Mixture 1 Locate the air filter and remove it. Click here for current stabilizers. Thanks man, Your email address will not be published. The best tune we can achieve is a slightly rich one. HT65C: Baja Heat Mini Bike - CARB. also make sure all 3 (50cc) 4 (150cc) bowl screws are tight. Turn the high speed needle 1/8th of a turn closed. It is surprising how well of a job a small 150cc engine can do at moving an adult around on a scooter or even a heavy go kart. Racing Performance Variator Kit - We recommend the 115mm diameter inner variator, spacer, and ramp cover either from Dr. Thanks for this layout Travis, appreciate it sir. If the RPMs go up, repeat step 1 in turn increments until the RPMs begin to drop. Just be sure you get a CDI that actually has a remapped ignition curve with additional ignition timing advance. Inspect the manifold, carburetor gasket, and intake gasket for cracks or other signs of damage, and replace if necessary. Common areas for leaks are between the manifold and the cylinder, and between the carburetor and the intake manifold. In addition, if you own a scooter, then check into some of the go kart engine mods because they may also work on your scooter. Remove the air filter and the four bolts holding the air filter base on. The adjustment for the carb is also blocked..is there a way around that? They said my cdi was bad, then after that they said my coil was bad and spark plug.I paid $200. As mentioned above, the stock CVK carb has a diaphragm needle valve slide that meters or lets fuel into the motor based on engine vacuum at different RPMs or operating loads. Also, too high of an RPM can be annoying while cruising with low engine loads. Another way that people try to increase performance of a scooter engine is to increase ignition advance. First remove the two screws holding the top of the air filter on. Remove the carburetor from the engine by loosening the clamp on the intake inlet manifold. Yerf Dog, Crossfire, etc) dont have to worry about this. When the engine is cold the automatic choke is in operation and that can change the idle speed. Recalibrating your CVT modification will not increase the actual power output, but it has a high performance-to-cost ratio. The GY6 engine has a magnet embedded in the outside surface which passes by a pickup sensor that acts as the trigger for initiating the ignition spark. Best to error on the rich side (larger jet), because too small of a jet and you could run too lean and damage your engine. Step three: Left and right, adjust the air adjusting screw slightly to nd the highest position Of course, more power would always be nice, but considering the small displacement of this GY6 based 150cc engine, it really is impressive. Click here for high performance ignition coils. Make sure you are good with a wrench as this installation will take a bit of skill on your part to install it. Not a big deal, but leaking fuel during idle can get a little messy Something to also be aware of, are clone or "flashy" looking carbs produced by many Chinese manufacturers. The CDI is sort of the brain of the whole ignition system and changing modules is as simple as unplugging the old and plugging in the new. Remove the two screws holding the choke/throttle control on the gas tank. PageSpeed score is an essential attribute to your websites performance.
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