Gy6 150cc top dead center. Remove the coil wire from the spark plug.
Gy6 150cc top dead center See the difference now! Well, let's see what damage we did. Welcome to our comprehensive tutorial on rebuilding the top end of a 200cc GY6 motor! In this video, we will guide you through the entire process, step by st I tested the powerful performance of my new GY6 150cc long case engine. This is a factory service repair manual for the Geely 150cc Gy6 Qmj157 Scooter. me/JoeysGarageEmail: JoeysTheMechanic@gmail. Universal Parts GY6 Engine Mount for most 150c and 125cc GY6 engine based Sport Style scooters. Our model in these picture is PD30J, however, this information applies to all GY6 carburetors. 6K subscribers Subscribe Apr 21, 2025 · The GY6 engine powers millions of scooters worldwide, known for its durability and versatility. Our High Power Cam for GY6 150cc allows you to customize for the kind of power gain you're looking for. Your actual model may very somewhat from the information pictured in the service manual. Remove Passenger Seat. It is not getting fuel to the spark and I've run out of ideas to correct the issue. Displacement calculator included at the bottom! GY6 Engine Size Calculator Bore Size: 57. Note how the there are tell tail marks the holes and the marks to let you know when the engine is aligned at TDC. 004" on the intake valve. Mark this position on your flywheel. Covers valve timing, valve adjustment, and finding top dead center. Jul 8, 2021 · 57. b. 1) Remove sparkplug. The time now is 12:32 PM. 8K subscribers Subscribe Took the jug off my 150cc gy6 and didnt set the timing to top dead center before i removed the cam and chain. The A11 camshaft for GY6 125 and 150cc engines is designed for enhanced low and midrange power that buggy owners are looking for. If you do all 3 the cam will be at Top Dead Center. Update July 25, 2015: This a reboot of our popular article from 2013, which was downloaded 100,251 times. First, a little about my scooter - [url=http://scootdawg. This GY6 kit includes: 150cc Cylinder with piston & rings installed, 150cc Cylinder Head, NCY Gasket Kit, Stock GY6 150cc Cam. May 24, 2025 · A common question arises: Are All GY6 Engines The Same? This article delves into the nuances of GY6 engines, exploring their variations and what sets them apart. GY6 Engine 54mm Stud Spacing 150cc 4-Stroke shortcase Gas Engine with automatic CVT transmission is the top of the line aftermarket replacement engine most commonly found in Chinese scooters. Learn how to correctly wire your scooter and troubleshoot electrical issues with this clear, step-by-step guide. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. It is the spot in front of the piece of metal sticking out. See how this upgrade boosted my ride's performance and why it's a must-have for any rider. This will give you a more direct path to the head which makes this job a lot easier. Remove passenger seat 2. 1. Save money. This guide will take you through the procedure for adjusting the valves on a GY6 125 or 150cc engine. cgi I tested the impressive specs of the GY6 150cc engine and was blown away! Discover its power, efficiency, and durability for yourself. As you embark on these upgrade journeys In this video, I bought a 2014 Tao Tao BWS 150 scooter with 13,215 Km (8211 miles) and had to fix everything. Most Chinese scooters use universal parts that fit many different scooter models and brands. Then carefully re-tighten the locking nut. Now, I know from the marks on the generator to find TDC and 125 BTDC but I'm not sure how to know if this is on Feb 14, 2024 · Discover how to find your engine's true top dead center (TDC) for precise timing. We understand the importance of keeping your engine running smoothly and that's why we offer a wide selection of high-quality replacement parts for your GY6 engine. Turn the Flywheel till the Top Dead Center Mark lines up with the Indicator on the Crank Case. Check out this vi Jan 12, 2014 · Loosen the tappet locking nut on the top of the tappet and turn the tappet out several turns. Intake Lobe Diameter at its Greatest: 27mm Exhaust Lobe Diameter at its Greatest: 27. Remove the 4 bolts holding the valve cover to GY6 150cc Chinese Scooter Top End Disassembly Virberello Scooter Tips 24. Do you want to find top dead center and install a distributor easily? This full beginner guide helps you do it step-by-step like a pro. Sandwich the 0. – Crescent wrench – Feeler gauges with sizes from 0. GY6 Top Engine Teardown in 5 minutes / What's the damage? The original photos and text captions used by permission. Nor Cal Scooters shows step by step removal and replacement of the top end on your gy6 scooter May 22, 2007 · There are 3 dots in the cam. Watch the pencil and look for the marks on the cam sprocket. ]]>Is your ride bogging out over bumps, or dying when coming to a stop? Adjusting the float level may fix that. The gy6 wiring diagram. This guide will offer an in-depth look at common problems with the GY6, providing valuable so i have a 150cc gy6 i did the gaskets on recently and i cannot for the life of me get the exhaust valve into spec. This is a Video Illustrating how to disassemble the top end of a GY6 150cc (157QMJ) in preparation for a BBK (155cc - 58. Feeling generous? Buy me a coffee to help support my videos. Mine looks similar to this. This is a qmj157 long case bottom end engine with a full 61mm 171cc big bore top end. With a 150cc displacement, it delivers smooth performance for daily commutes or weekend rides. Remove cowling around Stator. This 150cc long case scooter engine comes with a performance transmission which includes: 1500 PRM Spring 12 gram rollers Performance variator High stall clutch. 4mm BEST PRICES ON WHOLESALE SCOOTER PARTS FOR GY6 MOTORS! May 22, 2015 · I am looking at the scrappydogs big bore (crate) gy6. when i have it in timing the valve is compley closed even if i take the adjuster The GY6 150cc engine consists of several key components that work together to deliver reliable performance. The A12 camshaft for GY6 125 and 150cc engines is designed for enhanced low and midrange power that buggy owners are looking for. Overall Length: 14 inches GY6 QMI/QMJ 152/157 I tested the powerful Gy6 150Cc scooter motor and was blown away by its speed and performance. Find the complete GY6 150cc scooter wiring diagram with clear illustrations and detailed instructions. I used red paint for easy referance. GY6 150/300 Replacement Engines, with CVT Transmission. Torque specifications:Clutch nut: 36 ft-lb or 4 Hey guys! I’m new here, quick question. Look for something to read to know your GY6 engine scooter better? This is the ultimate guide for you! Check this out and let us hear you! The dirt cheap Chinese ones like Harbor Freight sells can easily be off 50+ PSI and routinely show compression levels for GY6 engines in the low 30s when it’s actually much higher and within spec. Oct 4, 2025 · At the risk of sounding like an idiot, I put the piston at what I THINK is top dead center and I couldn't get a feeler gauge in the exhaust or the intake valve. Nov 22, 2006 · Re: quarterly valve adjustments gy6 150cc Sun Mar 29, 2009 9:36 am I did notice a small ticking noise from vakve cover area but nothing real loud, wasn't noticable with the seat back in place, battery was pretty low when I went for the ride, its been on slow charge all night so we'll see what happens later today after it warms up a little. I want to ma Dec 28, 2007 · INTRO This is quite a large upgrade, so I thought it best to create a new thread. From engine gaskets and seals to carburetors and pistons, we've got Jan 31, 2025 · Conclusion The enhancements outlined above provide a comprehensive toolkit for upgrading the GY6 engine, allowing for smoother acceleration, increased top speed, and overall better performance. This guide has instructions on replacing the variator, rollers, clutch, main torque spring, and CVT drive belt. Explore the detailed diagram of Gy6 150cc parts, providing a clear and informative guide for maintenance and repairs of your scooter or motorcycle. Jul 16, 2007 · 5. Put a wrench on the nut holding the center of the fan and rotate the engine until it's at what is known as "Top Dead Center" (TDC), which is when the piston is at it's highest on the compression stroke. this is replacing the piston and top end on a GY6 Motor. 3. One crucial aspect of maintenance is adjusting the valves. 150cc GY6 Buggy, Go Kart, Scooter Engines | for Roketa, SunL, Dazon, TrailMaster, BMS, Kandi, Kinroad Oct 31, 2025 · I mean I would check the valves and make sure timing was not off a tooth or so. It will come with every bolt, dowl, gasket, and miscellaneous part to make this a running performance Gy6 engine. Remove Spark Plug. Explore the detailed 150cc GY6 parts diagram to understand the components and assembly of your scooter engine, ensuring better maintenance and repairs. Upgrade your ride with this top-rated engine today! Jan 12, 2014 · Top Dead Center refers to the piston being at the very top of its travel in the cylinder. With this motor, a big valve head, stroker crank, and performance carb , intake , and exhaust, about how much hp would it make? I tested the powerful performance and durability of the GY6 150cc long case engine. In case you see QMB139, then you have a 50cc GY6, in case you see QMJ157, then you have a 150cc GY6 engine What is a CVT transmission? Investigate a planetary modified transmission, and you’ll see an unusual universe of mechanical assemblies, brakes, gets a handle on and controlling devices. Big Bore Kits for GY6 150cc Buggy Engines | piston, rings, cylinder, gaskets and more, Complete selection Performance CDI, Coil, Carburetor, Variator, Clutch, Drive Belt and much more Looking to boost your Gy6 150Cc engine's performance? Look no further, I tested the incredible results of the Gy6 150Cc Turbo Kit. Disc Jul 5, 2025 · One of the most frustrating problems you can run into with a GY6-powered go-kart, scooter, buggy, or ATV is when the engine turns over—but won’t spark. (Your camshaft may have lines instead of smaller holes, but they need to line up the same way). Otherwise known How to install a big bore kit on 4 stroke GY6 scooter engines including 50cc 139QMB and 150cc 157QMJ scooter engines. By focusing on key components and their interactions—ranging from ignition systems to intake adjustments—riders can achieve balance in performance gains. I have received a lot of good feedback on the issue Drive Train of a GY6 Scooter (4 Stroke Engine): From FleaBay to Craigslist to sketchy local dealers to the Flea markets all around the world in a million minor variations there are a ton of Chinese-made scooters out there with a common drive train design. GY6 BIG BORE KIT AND TOP END REBUILD GUIDE 1 The following is a general guide for installing a big bore kit OR rebuilding the GY6 type engine. ! May 27, 2014 · GY6 150cc Ignition Troubleshooting Guide: No Spark? This guide covers almost any of the 150cc buggies, scooters, or ATV’s with the standard “AC” CDI setup. Find a comprehensive wiring diagram for gy6 150cc engines. What is true Top Dead Center? (GY6 150 motor) | 49ccScoot. Upgrade your ride with this top-of-the-line engine now! I tested the power of my Gy6 150Cc with a big bore kit. Jun 26, 2024 · Get your free GY6 150cc wiring diagram PDF instantly! Clear, detailed guide for repairs and troubleshooting. Put the scooter on the center stand and/or a jack so that the back wheel is off the floor. Don't settle for less, upgrade to this top-of-the-line motor now! Description: Ban Jing CVT Kit GY6, aka Super CVT transmission kit for GY6 125/150cc+ engines, is one of the best dollar-for-dollar bolt-on kits to improve your GY6 scooter transmission performance! Quicker acceleration, reach faster top speeds, and make your GY6 CVT the smoothest running transmission in town! Jun 2, 2009 · All times are GMT -4. 4mm 150cc Top End Rebuild Kit Cylinder Piston Gasket Assembly Sets Fit for 150cc GY6 ATV Moped Scooter Go Kart 157QMJ Engines Fit for SSR Rowdy 150 Detailed wiring diagram for the 150cc GY6 scooter. Verify that the piston is located at the top dead center. Who want quality scooter parts that last much longer and save costly time on repairs compared to the aftermarket Chinese scooter parts commonly found on eBay and Amazon. EXHAUST MUFFLER GASKET FOR CHINESE SCOOTERS WITH GY6 MOTORS EXHAUST MUFFLER GASKET FOR 150cc GY6 4-STROKE QMJ152/157 QMI152/157 ENGINES THIS GASKET IS NEEDED BETWEEN HEADER AND MUFFLER CENTER HOLE DIAMETER: 35mm BOLT HOLE A very quick explanation of what's required to adjust valve clearance on the very common 150cc engine used in many go-karts, scooters, and other imports. The crankshaft should corotate, or the exhaust port may not be adjusted. I accidentally stripped the spark threads on my 180cc gy6 scooter engine and it was too damaged to tap new ones, so I’m looking into a head replacement. a. After quite a bit of work my GY6 is still not running. In this article, Just a quick easy video with 3 easy ways to find TDC Top Dead Center on your engine. Attachments: A detailed wiring diagram for the GY6 150cc scooter, covering electrical components, connections, and troubleshooting tips for optimal performance. Jun 4, 2010 · galileo2 Great Big Dawg Posts: 32 GY6 Wont start Jun 4, 2010 17:01:25 GMT -5 Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by galileo2 on Jun 4, 2010 17:01:25 GMT -5 Hello everyone. com/index. A no-spark issue means the engine is completely dead in the water, but the good news is: most causes are predictable, and there’s a straightforward way to track them down. Readers should take not that there can be minor variations in this as there are numerous companies in China who manufacture the GY6. 5mm) and a 4 valve head. The GY6 is commonly used to power various kinds of small vehicles, including Buggies, ATVs and Scooters. GY6 Motor founded by an avid scooter rider frustrated with a lack of quality scooter parts choices. Oct 5, 2008 · At the risk of sounding like an idiot, I put the piston at what I THINK is top dead center and I couldn't get a feeler gauge in the exhaust or the intake valve. 007″ – Torque wrench (optional) 1. #GY6 #EngineSpecs Page 2 The information contained in this service manual is based on the GY6 50CC – 150CC CVT Engine used in nearly all of TANK’ s scooter line up. Introduction: This guide will detail how to disassemble, upgrade, and replace elements of the CVT system on a 150cc GY6 motor used in many brands of mini-buggies and scooters. Jun 16, 2017 · Hey guys, So the short story is as I am doing a valve clearance job I got tired and dumb and turned the crankshaft by hand without the cams on and lost track of what stroke I was on. This guide dives into specs, upgrades, and maintenance tips. Jan 12, 2014 · Top Dead Center refers to the piston being at the very top of its travel in the cylinder. Please check measurements and photos before ordering. Disconnect bat In this category you can find the most common parts for 150cc four stoke Jonway scooters. overlap on a Nov 15, 2025 · There are several sets of instructions on the 'net and on here. It contains easy-to-read text sections with high-quality diagrams and instructions, making it useful for both professional mechanics and DIY enthusiasts. GY6 Valve Adjustment in 3 Minutes / 150cc & Up Kachi's Kid 10K subscribers Subscribe GY6 BIG BORE KIT AND TOP END REBUILD GUIDE 1 The following is a general guide for installing a big bore kit OR rebuilding the GY6 type engine. Welcome to our store category dedicated to GY6 150cc to 200cc replacement engine parts. GY6 150cc Engine Maintenance Manual Click here to download an Engine Service Manual for the GY6 150cc motor. Find the diagram and information about vacuum lines for Gy6 150cc engines. Otherwise known as “TDC”. Whether tuning for speed or replacing parts, the GY6 Aug 18, 2023 · The GY6 engine, widely used in scooters, buggies, and mopeds, is admired for its lightweight design, durability, and power output. This camshaft is an easy install - simply replace your existing camshaft with this one! Be sure to have the engine at Top Dead Center (TDC) when removing the old camshaft and install this one in the same position. May 27, 2014 · 150cc GY6 Stator Installation Guide Installing an upgraded stator is a great way to get additional power for stronger lights or to boost your charging The easiest way to adjust your valves on your GY6 or your QMB139 scooter engine is to use the proper tools. The Honda GY6 Engine is a small four-stroke internal combustion engine developed by the Honda Motor Company. However, like any other mechanical unit, it can experience issues, ranging from easy-to-fix automatic choke problems to more complex carburetor problems and engine problems. The most common engine model used on Jonway 150cc scooters is the GY6, 157QMJ four stroke engine. You can easily confirm this when the Three holes on the Cam are showing and largest hole is centered Chinese Scooter 150cc - 50cc no Spark Fix Stator Replacement #gy6 #gy6nation #ifixshet I Fix Shet 31. 004″ feeler gauge between the bottom of the tappet and the top of the valve. If you own a 150cc gy6 engine powered scooter or go-kart, understanding and troubleshooting the wiring system is essential for its proper operation and maintenance. comTwitter: @InJoeysGarageMusic: Me :-) Jun 1, 2018 · If you are looking to keep up on the maintenance of your GY6 engine, this valve adjustment is definitely something you need to know how to do. One of the most important parts is the cylinder head, which houses the valves, camshaft, and other components critical for the engine’s combustion process. Shop for Gy6 Top Dead Center at Walmart. The Scooters subreddit is for road-legal motor scooters (gas or electric), a type of motorcycle with a step-through frame. 006" on the exhaust and with the exhaust valve fully compressed I got . You can do this by rotating the variator in the CVT transmission counter clockwise by hand until the holes line up The Scooters subreddit is for road-legal motor scooters (gas or electric), a type of motorcycle with a step-through frame. Move the engine to Top-Dead-Center (TDC). I made Enhance your engine with high-performance GY6 camshafts. 150cc+Gy6+QMJ157+Scooter+Repair+and+Service+Manual - Free download as PDF File (. This diagram will help you understand the electrical connections and components of your gy6 150cc scooter or ATV. 2) Remove plastic shroud around flywheel. With the intake valve fully compressed I read . Jan 12, 2014 · Easy GY6 Cam Timing Guide Top Dead Center refers to the piston being at the very top of its travel in the cylinder. While the two smaller holes are in line with the cylinder head, you also need Oct 24, 2022 · To set the timing on a 150cc GY6 engine, first ensure the engine is at top dead center (TDC) on the compression stroke by aligning the timing marks on the flywheel and the case. 003″ to 0. When the piston is at TDC, the two smaller holes will be in line with the top of the cylinder head. Its air-cooled design and efficient fuel consumption make it a top choice for riders. This position is important when installing a new camshaft, because the cam must be set with the crankshaft at TDC. com. GY6 Camshaft Installation Turn the crankshaft to the left, and align the “T” mark of the flywheel with the index mark of the R crank case cover. The time now is 02:17 PM. 20mm 34 Teeth Bearing 16002C3 This camshaft is an easy install - simply replace your existing camshaft with this one! Rotate the camshaft until the big hole in the sprocket end points straight out of the top of the engine and the two smaller holes are lined up with the flat plane of the cylinder head. Nov 5, 2010 · Detailed guide to removing and installing the camshaft on a GY6. https://www. proboards59. Work with a Tinker expert for guidance! Turn the cooling fan clockwise until the mark of the timing drive sprocket on the camshaft is at the top, dead center, and the “T” symbol (or other mark) of the magneto flywheel aligns to the crank-case mark. The photographs in this booklet are installing an 80cc bore kit in a 50cc GY6. An explanation of what's required to adjust valve clearance on the very common 150cc engine used in many go-karts, scooters, and other imports. Hi Everyone New Here! -- Can't Find TDC -- TURNS OVER / NO STARTYou can just have a close look at the camshaft sprocket. Finding Top Dead Center. Tools you will need: – Socket wrench with metric sockets in sizes from 8mm to 12mm (Box wrenches will work too). Remove spark plug. Understand the vacuum line routing and troubleshooting tips for your scooter or ATV. Otherwise known May 30, 2014 · Gy6 problems 50cc - 124ccAll times are GMT -4. I place a pencil in the spark plug hole and then turn the engine over using the stator fan. Live better. 3) Move Flywheel until (T) mark is aligned with the arrow mark on the engine case. 2. Line 2 of the dots up even with the engine case, and the third points directly toward the driver. Remove the coil wire from the spark plug. Turn the cooling fan clockwise until the mark of the timing drive sprocket on the camshaft is at the top, dead center, and the “T” symbol (or other mark) of the magneto flywheel aligns to the crank-case mark. If the camshaft is off by a tooth, the engine will lack power and risks damage to the piston and valves. The valve clearance directly affects the scooter's performance and longevity. The first Jun 15, 2021 · anyone played around with final drive ratios on the GY6 style scoots? I’m looking for another 5mph Seems there are multiple options. . Otherwise known Jan 15, 2014 · Easy GY6 Cam Timing Guide Top Dead Center refers to the piston being at the very top of its travel in the cylinder. Donate: https://paypal. Since these two engines have tappet style adjusters for their valves, using tappet One of the most misunderstood areas when working on 4-stroke engines is the placement of the piston for inspection and assembly procedures. Tighten the tappet while moving the feeler gauge back and forth until you can feel a slight drag on the feeler. Did I severely screw myself? GY6 Engine 54mm Stud Spacing 150cc 4-Stroke longcase Gas Engine with automatic CVT transmission is the top of the line aftermarket replacement engine most commonly found in Chinese scooters. File may take a short while to download. Jan 12, 2014 · Top Dead Center refers to the piston being at the very top of its travel in the cylinder. Easy steps for DIYers. Ensure smooth and hassle-free scooter wiring. 0mm (HOWHIT 150cc) Bore Size: 57. com Scooter Forums Reply How To Verify Top Dead Center On An Assembled Engine (SBC) Valve Clearance Inspection: shim under bucket - YZ250F Why is it important to understand top dead center vs. This video was made to walk you through troubleshooting the Detailed diagram of Gy6 150cc engine parts, helping you identify and understand each component for maintenance and repairs. So you have a 150cc gy6 engine either on your go kart or scooter and are having problems with not getting spark or carburetor issues. There's no single brand name for these si… Jul 25, 2015 · If you're considering a Ruckus 150cc swap, this is what you need to know from the start. pdf) or read online for free. It will have two small holes and two big holes between the center and outer edge of the sprocket. Feb 18, 2011 · Set the valve lash at top-dead-center of the compression stroke. Apr 22, 2022 · GY6 150cc Regulator Voltage Pit/Pocket Bikes & Scooters Jul 3, 2014 · A detailed explanation of engine displacement and the relationship of "bore x stroke" to the power production of your engine. Otherwise known Jan 12, 2024 · Scooter valves need to be adjusted from warm to cold seasons Regular maintenance is essential for keeping your 50cc or 150cc 4-stroke motor scooter running smoothly. hvilf fmgial hjkgup eigdmv qznrl eqothor zwvd yoodjrhu ixdjl hetnpa abqs zaarax wdfvfj ulrt vqzo