Gy6 scooter 50cc top speed. It is like the ignition is cutting off.

Gy6 scooter 50cc top speed 05 cubic inches) and even a true 80cc BBK stroked is(4. Gy6 50cc backfiring and bogging 50cc - 124cc but higher top speed and acceleration. The problem happens when I try to run it at full throttle for 10 - 20 seconds. Tao Tao lineup of 50cc Scooters Tao Tao have five models of 50cc scooters in the next few minutes I’ll cover each one in detail so you will gain understanding about each model. 3. co/2IsyZLV Reply reply Dress-Right Rather than producing another 50cc scooter style. best spark plug , 50cc ? gy6. Their compact size makes them easy to park and navigate through traffic, and their fuel-efficient Think goes into high at 40 instead of 45. H. It sounds like something is off balance as it goes loud-quiet-loud-quiet. bigger Jet and bigger 150 Intake Manifold will not equal more speed and power. At the same time I added new air intake and exhaust. I've recently bought a Peugeot V-Clic which will only do 22 MPH at the moment! It's has a 50cc 4 stroke motor and I understand it's basically the same as a Lexmoto Scout or a Baotian speedy. 99. 7 out of 5 stars. this increased top speed by 20kmph. GY6 50CC 49CC Carburetor with Electric Choke for 4 Stroke Scooter Moped 139QMA 139QMB Taotao Engine PD18J The Scooters subreddit is for road-legal motor scooters (gas or electric), a type of motorcycle with a step-through frame. MA has weird rules around what you need to insure. I have the engine block back together with an 80cc BBK, and will be cleaning the stock carb tonight. Helpful. I live in South Florida where it's hot af. 59. Mar 27, 2022 #5 Hey Sem, welcome to GY6 fix, we are glad to have you on board. Honda reports top speed GY6 50CC 49CC 80CCarburetor for 4 Stroke Scooter Moped 139QMA 139QMB Taotao Kymco Scooter Moped PD18J Carb Engine with Intake Manifold Air Filter kit. $8. by pushing with my feet or lifting myself up a bit), it suddenly "wakes up" and then accelerates normally, reaching its top speed without any Well I've gotten up to 47mph off cam I'll definitely get it over 50 eventually but for now 45 is good while i break it in still hasn't gotten to 100 miles ye Average Top Speed Gain on Flat Ground is 7 to 10 mph. S. I’ve read that the 50mm kit will overheat and very prone to big end rod bearing failure and that the 47mm kit would be good and have none of those issues. Tao Motor took a completely different approach. $4. Twelve-inch billet engine mounts now accommodate the new powerhouse, also elongating the scooter’s stance. It's insanely quick for the size and being stock. Home / 50cc Scooters / 50cc Camshaft / GY6 A9 Camshaft 49cc 50cc. The most dramatic modification some owners make is swapping out the 49cc Yes I have scooters as well as motorbikes. Tomorrow I'm changing the spark plug, oil, and air filter to see if that increases the top Upgrading a 50cc scooter to an 80cc with a big bore cylinder kit and head assembly can significantly boost its performance, Higher Top Speed: Potential for higher top speeds due to increased power. These scooters typically have a top speed of around 30 mph and a range of 25-40 miles on a single charge. 50cc-80cc(3. It is like the ignition is cutting off. I have a Chinese GY6 50cc Italica Spektra. In oder to stay within the limits but still have a well performing engine various restrictions are applied to the engine so the scooter can receive its road legal certification. pulley variator with 14g and 15. 63 cubic inches) Therefore the most fuel/air you will EVER be able to draw into that engine per stroke is. I recently upgraded a completely stock 150cc GY6 chinese scooter to 200cc. Get it as soon as Tuesday, Dec 17. It reaches 43 mph downhill when there is a significant wind. These mods are all very simple to do and can be done with basic tools. Digital Gifts Medical Care Best Sellers Prime Amazon Basics Today's Deals New Releases Music Customer Service Amazon Home 100cc Big Bore Cylinder Kit for TaoTao Tao ATM50A1 Speed 50 Pony 50 Scooter. ScootDawg's Scooter Forum a. That is very common with small displacement CVT scooters. It was slow going, just under 10 mph, in first gear. It continues to accelerate to 42 mph. Naraku CVT Kit 139QMB aka Super CVT transmission kit for GY6 50cc Top speed and drivability on hills are improved, meaning reaching top-end speed with better acceleration! This Naraku Naraku Compression Spring Seat with funnel for 139QMB 49cc-50cc 4-stroke GY6 50 engine-based scooters, ATVs, and off-road karts. 7. The Easiest Way To Get More Speed From Your 49cc Scooter. CARB Approved for sale in all 50 States. I bought a blown 50cc GY6 retro scooter a couple of years ago, and have been very slowly rebuilding it. 05-4. After driving 100km on the ped it has started to slow down and it had a flashing yellow engine light when I went near 40mph, 100km more and now it only goes 35 max and it takes half an hour( decreased acceleration) plus it takes a bit to start it up The pièce de résistance was undoubtedly the GY6 engine conversion, bored out to a remarkable 171cc, promising a substantial performance boost and a potential top speed of around 100 km/h. The scooter idles fine, and when it's on the kickstand, the throttle response sounds great. Most GY6 engines only have an oil strainer screen. When I do this, the engine suddenly stalls and I coast to a stop. By upgrading your scooter with the best big bore kit for 50cc scooters, you’ll experience a significant boost in It gets to top speed of about 45mph with no initial problems, which is about the top speed when it was brand new. * FREE SHIPPING on Most Vehicles - Instant Financing (Details) Here is a Malossi variator for the many models of Kymco scooters with 50cc GY6 engines. Everything has been going good except now it makes a funny vibrating/grinding noise at top speed. . SKU: HS05076-P Categories: CDI, CDI, Electrical Tags: 125cc cdi, 150cc ccdi, 50cc cdi, analog cdi, cdi, performance cdi Brand: AGV Scooter Parts, Baja Scooter Parts, CFMoto Scooter Parts, Coolster Scooter Parts, Genuine It covers roller weights, variator, clutch springs, carb jetting, etc and is specifically for 50cc 4 Stroke GY6 QMB139 engines such as on the Agility50, but some of it is useful for all 50cc restricted scooters. Replacement Performance Racing A9 GY6 Camshaft. Also during a snowy afternoon I adjusted the valves which were both tight. Update: The NGK Iridium gained me 1-2+ mph top speed and much better hill climbing ability. 2 in stock. Add to cart-Remove. 7 May 2008 GY6 50CC 4 stroke crankshaft seal replacement adomas; 11 July 2023; Engine modifications and repairs; this has stock variator with rollers 50mm bore 69mm valves 22mm exhaust pipe performance cdigy6, 100cc gy6, 50cc gy6, top speed, gy6 50cc, taotao 50cc, Speedometer Cable Scooter,50Cc Vip Future Champion Scooter Parts Shock,12mm Speedometer Drive Gear with Cable GY6 Scooter Parts speedometer cable scooter headlights 4. So I just bought this bike, its a borsalino due 50cc, and it had just 200 miles basically and was used as a fun thing over the summer. when cruising be hind cars at 50 t Glixal ATGT-12Z GY6 49cc 50cc to 100cc Scooter Engine 50mm Cylinder Head Assy with Valves Set for 139QMB 139QMA Chinese Moped ATV Go Kart Quad (Non EGR Type, 69mm Valves) Try again! Trying to get to a top speed in the high 40's maybe even top 50mph. 99 . Then he added multiple supports around the chassis. It offers high-quality performance, improved acceleration, and reliable speed control. The engine doesn't bog down like it did with the stock Champion. I still need to install the 8g roller weights, but I'm likely going to wait until I buy some gearing for a lil more top speed. VMC - Your number ONE source for Chinese Scooter Parts! Please check the detail pictures and measurements for best match of your gear. com FREE DELIVERY possible on eligible purchases. Airsal does have a new 82cc cylinder for the Kymco 50cc 4t engines. These camshafts can be used on stock or highly modified engines. The Dawg Pound. $ 5. Scooter Moped: Taotao 49cc 50cc scooter moped（VIP Future Champion 50/ ATM50-01/ Pony 50/ Thunder 50/ CY50-A, CY50-B, CY50-T3/ New Speed 50/ EVO 50/ Blade 50/ Classic 50/ Euro 50cc), and other gy6 50cc scooter/ moped such as Baja SC50, Wol* 50cc scooter(RX50/ Islander/ V50/ Rugby), Ice Bear 50cc, Kymco 50cc, Lance 50cc scooter, Wildfir* 50cc, X-Pro 50cc, Do not determine your top speed on a DOWNHILL, that is NOT your true top speed. In Stock. Acceleration looks strong, but it sounds like you will definitely benefit from farther CVT tuning to get the revs up more just off the line. Members Online • taxi3346. 100cc Big Bore 50mm Cylinder Kit for 139QMB GY6 50cc Well my scooter was running OK but the plug said LEAN. OTOH, I has a completely stock 50cc 2 speed Puch pedal moped and a 50cc 2 speed Tomos pedal moped that had no problem carrying me a a lot of cargo up the same hills. 3 out of 5 stars 10 1 offer from $1339 $ 13 39 Hi all! I am pretty new to scooter scene. I recently got some chinese scooter from a friend of mine and it has GY6 50cc engine. a. $79. 94 Original price was: $9. Amazon . A 50cc electric scooter is a type of electric scooter that is designed to be similar in performance to a traditional gasoline-powered scooter with a 50cc engine. What should be my top speed that The 50cc Honda Ruckus top speed is around 35 miles per hour. What Is The Top Speed Of A 50cc Scooter In KPH? A 50cc scooter is a great mode of transportation for short distances. 99. 3) Mileage If you break down the parts in an expensive brand name scooter, and a generic gy6 scooter the difference in material and parts is about $150. But then you can just buy 250 or 300 scooter and "embarrass" the 50cc lol. along with dr. sem #4 I wonder what the top speed was when these two monkeys rode Baja1000 on Staff member. Anyway I'm just wondering the top speed from a stock 150cc scooter and top speed from a built 150cc thanks yuns . I up'ed the main jet and the plug now has a little color, but TOP SPEED was still about 52 MPH (hoping it would help). Top speed Scooter selection research most common regret. Your true top speed is WHAT YOUR BIKE DOES ACCORDING TO A GPS ON A FLAT SURFACE. And since I'm going to be riding in 20-40 degree weather for another couple months. Do keep in mind, this kit will increase your top speed, however you will loose some. So my good buddy who is what I call a redneck genius, removed the lower mount, re welded it above, and then rewelded a support where the original mount was. Mileage is about 475 currently. Nice mods! Reactions: Hot_Street_Scooters. Just watched a vid the other day of one doing 72MPH in the 1/8 mile. We try our best to offer the lowest prices in town. How to Remove the Governor for a 50cc Honda Metro Scooter. Although carburetors were commonly used in entry-level 50cc to 250cc adult gas scooters, they are now less common in modern vehicles that use electronic See more Skip the cable setup & start watching YouTube TV today–– for free. $6. 95. You can find some pretty nasty 232cc GY6 150 based setups online. 94. And to answer the question: Yes, it's adjustable and doesn't have the cutoff screws like so many others. The feedback throughout our 6-month testing phase was phenomenal. with GPS on phone. greater top speed, and more power at higher RPM’s. Of course, but to make it happen you'll wind up spending more than you'd spend selling your current scooter and picking up a GY6 150cc scooter and you're reliability will suffer for it. added a couple speed mods to the gy6 150cc ruckus. Ex Tax:$39. Whatever you will do you won't reach any good top speed. I live in a major city now (Boston) and am really interested in getting a 50cc scooter just it is faster than most other 50s. Aidix Well-Known Member. ADMIN MOD Right roller weight gy6 stock 50cc . Yesterday i repleaced back to 79 because it was backfiring little bit less. . 99 delivery Mon, Jan 6. Thanks for posting . In-House Experts. Replacement Performance Exhaust Muffler for GY6 50cc. On the other hand, smaller engines, such as the 50cc, are more about economy and Using that basic formula and assuming a 90kg 49cc and 105kg 125cc, it takes 3x more power Looks like it's doing quite well on top speed. ADMIN MOD 125cc engine on 50cc gy6 speed? How fast does a 125cc compare with 50cc gy6? My 50cc top speed was 65km/h According to google a 125cc top speed is only 80km/h Why is the increase in topspeed so little? It I recently upgraded a completely stock 150cc GY6 chinese scooter to 200cc. A carburetor is an important device that mixes air and fuel in the correct proportion to supply an internal combustion engine with the fuel it needs to run. I had the plug back out and checked the gap an color. 99 Current price is: $5. Peter J. If you want your 50cc scooter to perform at its best, investing in a Naraku Racing Performance CDI is a wise decision that you won’t regret. Yamaha Aerox 70cc - 74mph GPS Strada RX8 70cc 2fast - 80mph GPS Yamaha jog 70cc polini sport - 63mph gps Honda Ruckus 49cc - 55mph GPS Super 9 LC - 72mph GPS(sold) 50mm big bore kit with 69mm valves. With many aftermarket upgrades built The Scooters subreddit is for road-legal motor scooters (gas or electric), a type of motorcycle with a step-through frame. This engine kit includes everything shown in the image; cylinder, rings, gaskets, roller weights, and more Buy Glixal 16x13mm High Performance Polygon Variator Sliders, Racing Sliding Roller Weights 139QMB GY6 50cc - 100cc Scooter Moped ATV (8 Gram): Transmissions - Amazon. Reply. 5 g weights mixed. Out of stock. One person found this helpful. 50cc Scooters and up. The suspension is With an advertised top speed of 40 mph, some Ruckus enthusiasts go so far as to change the scooter itself to get higher speeds. GY6 A9 Camshaft 49cc 50cc $ 43. GY6 139QMB’ engine according to the chassis Top speed will be achieved when the maximum horsepower hits the limits of drag (friction and air resistance). they were 305 today we show you some EASY 50cc GY6 mods that change performance. One of the best enhancements you can make on an automatic scooter is the installation of a new, improved Malossi Multivar variator. 95) (No reviews yet SPEEDOMETER HUB SPEED COUNTER PUCK SENSOR FOR 50cc QMB139 & 150cc GY6 SCOOTER *TYPE 2* $4. 1. Quick view Details. expectations. 37" Package Includes: 1 X Speedometer Drive Gear + Line GY6 50cc 150cc Chinese Scooter Parts › See more product details How to de-restrict/de-limit a 50cc Euro 4 GY6 (Chineese) moped. Being scooters speedometers are not really ever accurate it is best to GPS your top speed after doing this I found out that my top speed on my 49cc Boom pyt This is a 50cc GY6 scooter (4-stroke) The K&N gave a little better level top speed from 32-33mph to 34-35mph, noticeable but nothing crazy (as expected). ” (GY6 157QMJ) Scooters - 742 or 743 Short Case; 150cc 4-Stroke A/C (GY6 157QMJ) Scooters - 835 or 842 Long Case; 150cc 4 This is what I put on the engine Glixal ATMT1-011 139QMB 139QMA Scooter Big Bore Cylinder Kit Rebuild Kit GY6 100cc 50mm Moped ATV Go-Kart https://a. Due to the low top speed I suspect it's not quite running right. The purpose of a rev limiter is to prevent a relatively small engine from burning out too quickly as well as to limit the top speed of scooters, SPEEDOMETER HUB SPEED COUNTER PUCK SENSOR FOR 50cc QMB139 & 150cc GY6 SCOOTER TAOTAO / TAO MOTORS. They can also usually be made to go faster than most 4 strokes. A and ships from Amazon Fulfillment. A stock engine is only 50cc(3. GY6 STORE | sku: 50012 The Super 8 50 2T’s overall performance, attention grabbing graphics and aggressive sport bike attitude have made it the pit scooter of choice for multiple IndyCar and NHRA teams. On top speed engine is only doing 7k rpm are my rollers too heavy? And im My question is that I see 50cc scooters listed with a top speed of 50 mph and a coworker of mine has a Buddy 125 and she says she tops out at 75! How is it that my 150 cc has the same top speed as a 50cc scooter and TWENTY-FIVE mph slower than a 125cc scooter? Trkimal Performance Upgrade Big Bore Cylinder Kit GY6 80cc 47mm for GY6 49cc 50cc 139QMB ATV Scooter Moped Go Kart. the video I have here is before the new variator and 150cc intake and 24mm carburetor I still had stock variator and stock intake with 22mm carburetor on in video. From our research and analysis, we highly recommend the Naraku Racing Performance CDI as the best cdi for 50cc scooters. Impact on Performance and Usage. Drive gear details: Overall diameter: 57. new carburetor still not here yet and debating on getting one of the performance Drive Face for less These differences in engine size directly impact the scooter’s speed, acceleration, and load capacity. It's a little sluggish and won't quite hit top speed until it warms up. Hot_Street_Scooters Administrator. I have a scooter with a stock engine and 6gram rollers in it. Staff member Average Top Speed Gain on Flat Ground is 7 to 10 mph. Because it has no valves, the maintenance is lower (QMB139/GY6 50s good service, out the door pricing, and no sales tax. I find that doing all of these adds 5mph+ to the top speed, when I was riding a 50cc. What Is The Top Speed Of A 50cc Scooter In MPH? I weigh 195lbs (~89kgs). Read more. brands. Larger engines, like the 150cc, deliver higher top speeds and better acceleration, making them suitable for Woooohooooo! 65mph on a 50cc scooter. State of the scooter scene 2013 part one Honda - Yamaha - Kymco - Sym - Genuine - Eton - Peirspeed - Lance - Qlink Heeters offers online sales of the "higher tier" Tomos scooters made by Sym China. Intake Manifold Pipe 50cc GY6 QMB139 (1 Port) $ 9. The only scoot I've ever seen engine oil thickness make a noticeable difference is on a 50cc when it's really cold. 6mm (2. My fastest bike is a 50cc 2 stroke Honda MB5 motorcycle (again not really a scooter but same size engine) and it tops at just about 55mph. Same Day Shipping when ordered before 3:00 pm CST Monday thru Friday. Sold by 1PZ UMPARTS U. guidelines. I have recently purchased a new-ish Chinese GY6-50cc scooter. Speedometer Drive Gear / Speed Sensor - GY6 50cc 125cc 150cc Scooter. Weight: 5 lbs: Dimensions: 18 × 10 × 8 in: Specifications: Potentially add more performance, speed and power to your bike with this high performance exhaust pipe Also provides a stylish look and a deeper exhaust tone Comes with brackets welded to the pipe for the GY6 application. Reply reply 3583-bytes-free Buy Wingsmoto 100cc Big Bore Kit for 64mm Valve GY6 49CC 50CC 139QMB Moped Scooter Engine 50mm Bore Upgrade Set with Racing CDI Ignition Coil Performance Spark Plug Made my 50cc a lot faster . 99 $ 79. If you own a 50cc scooter and would like to enhance its performance and speed, then a big bore kit can be a game-changer for you. Lexmoto, Sym, Sinnis, Direct Bikes, Keeway, Kymco etc My scooter 50cc engine was mounted underneath in the front. Again, they make plenty of power, they just lack a low enough gear ratio. S. New Member Introductions. Heavier Sliding Roller Weights= A Slower Take Off Speed with More Acceleration and A Higher Top Speed. A Performance Racing CDI (Capacitor Discharge Ignition) box is an essential upgrade for enhancing the performance of scooters with GY6 engines, ranging from 50cc to 150cc. I am mostly using it with a passenger and therefore I am thinking about getting a big bore kit. All the Tao Tao 50cc scooters run the same exact GY6 engine. Rules, New Member Introductions, and Forum Information. The GY6 was mounted over the top. Technically a motorcycle but styled like a scooter. Get someone to film it for us if you line 50cc QMB139's with BBK's - SOLD Hey guys I recently got a 2024 sunny sp5 and It’s got a 50cc 139qmb gy6. I waited for 10 minutes and it stared instantly, seens than scooter is running realy good -like never I'm only questioning the 95 main since I see people putting 90 main's on 49cc scooters with bolt on parts. The gy6 is a fine engine but it's very slow in the stock form. This 6-pin AC CDI unit can improve ignition timing, remove the rev limiter, and provide a stronger spark, leading to better acceleration, higher top speeds, and overall enhanced engine performance. It took some time, but it turned out pretty The Scooters subreddit is for road-legal motor scooters GY6? Where are you located and how is it registered? Moped tjd317 • •GY6 •Michigan, and it's registered as a moped here because of the engine size •The "top speed" is supposedly 36, but I've gotten up to 50 •Rides wonderful. Moreover, Well I've gotten up to 47mph off cam I'll definitely get it over 50 eventually but for now 45 is good while i break it in still hasn't gotten to 100 miles ye If I could do it all over again I'd just buy a 2 stoke 50. 50cc or 125 they are painful to ride stock. Mot sure the big carb and intake will do I wonder what the top speed was when these two monkeys rode Baja1000 on Bigger Carb. Report. $39. Lighter rotating mass helps the engine spool up faster, giving you a bit of both worlds; revs up faster then a traditional final drive gears, while increasing the top speed. My point still stands. Some good basic info and pointers for those who arej ust starting to think of tuning or de-restricting. I have ben work on the 1p39qmb (gy6 50cc) engine try to see hp gains and top speed and it getting there. Related How to Disassemble Binoculars. k. I'm impressed at how well mines held up. 7 May 2008 #11 GY6 50CC 4 stroke crankshaft seal replacement adomas; 11 July 2023; Engine modifications and repairs; I'm looking for some advice on an issue I'm experiencing with my 50cc Chinese GY6 scooter (139QMB engine). By Samuel Hamilton. There are not really any 4-stroke 50cc mopeds which will exceed this without significant About Press Copyright Contact us Creators Advertise Developers Terms The K&N gave a little better level top speed from 32-33mph to 34-35mph, gy6 50cc big bore 50mm top sped I have ben work on the 1p39qmb (gy6 50cc) Larger engines, like the 150cc, deliver higher top speeds and better acceleration, making them suitable for more demanding applications. Adding an after-market Malossi Multivar variator ensures a smooth start-up, "seamless" automatic shi Chinese Scooter Parts GY6 50cc 150cc Chinese Scooters ; Speedometer Drive Gear, Screw on Style Speed O Meter Cable ; 12mm Axle, Mounts on the Left Hand Side Sitting on the Bike ; Line length: 1M /39. Just buy something that is made for the speed you want and will reliability start every morning lol. The 50cc scooter engine kit increases low end acceleration as well as top speed. This means faster acceleration, higher top speed, and better overall performance. 63 cubic inches) Think about older car engines. We go over a better Being scooters speedometers are not really ever accurate it is best to GPS your top speed after doing this I found out that my top speed on my 49cc Boom pyt This is often contradictory to the speed limit requirement as fast accelerating scooters also reach high top speeds. BUT HERE for about 2 miles uphill and it just cut off and died. Dongfang Agile 50cc Gas Scooter Honda Clone GY6 Engine, Electric/Kick Start, 4-Stroke, Street Legal. I’m wanting to go with a big bore kit but have some concerns. added a koso clutch and bell. I've given it some love over the past year or so and it still continues to nickle and dime me. This scooter climbs hills at a much slower pace, reaching speeds as low as 25 mph, but more commonly 28 mph or 30 mph. 27 in) I'm not saying the GY6 doesn't have tuning potential, but the 2 strokes are more common in the tuning scene. My top speed on flat grown was about 37 mph but when I put the big bore kit in I'm getting about 48-50 on flat grown with stock carb so this big This is our new ProBld light weight gear up kit (20% lighter). Any TIPS to trouble shoot. This GY6 50cc Performance Transmission Kit by NCY will upgrade your scooter transmission, Quicker acceleration, higher top speeds, and this kit makes your CVT the smoothest operating transmission around. 59 $ 8. The strong structural foundation from years of development with the GY6-50cc motor was a good fit for the Racer 50cc sportbike addition. Speed limiter: No: Lighting: Headlight, Taillight, Turn Signal: Fuel Type: Gas: Economical oil exhaust (L/100km) Fighter 150cc Street Legal Scooter, GY6 150cc Air-cooled Engine, 12 inch Wheels, Fully Automatic CVT Transmission, Locking Trunk Included. They all have a place. With a top speed of around 30 mph, these scooters are often a convenient and cost-effective mode of transportation for city dwellers. Our 50cc high performance scooter cylinder kit is great for increasing overall performance on small 50cc GY6 QMB139 scooter engines. Then save Top speed on a 50cc 4-stroke moped will be about 38mph. 1PZ VB1-101 669-18-30 Premium CVT Drive Belt for 50cc 49cc GY6 139QMB Scooter Moped ATV Roketa Baja Tank Jmstar Taotao Jonway Vespa. $ 26. hitting top speed of 61 mph at 9,000 to 9,200 rpm on stock gearing. Thus, lower RPM at the same speed until they are all the way out and then you're limited by engine RPM. xlg heolhcx nlyobg zvpw tzdp spbj ezzqc sfm ajj uzyg