Gy6 clutch upgrade


This page will look at ways to modify and increase the performance of gas scooter engines, which are now being used in go-karts. 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. A lot of scooters and go karts are powered by a cc engine based on the Honda GY6 scooter engine design.

The GY6 engine with CVT continuously variable transmission has decent performance for it's small cc engine displacement. It is surprising how well of a job a small cc engine can do at moving an adult around on a scooter or even a heavy go kart. Of course, more power would always be nice, but considering the small displacement of this GY6 based cc engine, it really is impressive.

Even so, mod kits for gas scooters and go karts are available, and other modifications can be made to increase performance further.

The GY6 based engine found in these scooters and go karts is like most any other internal combustion engine - in that it can benefit from some well directed modifications. This is true of just about any mass produced engine which have compromises that are driven because of manufacturing restraints like time and cost. These compromises usually limit efficiency and performance potential of an engine. Increasing air flow through an engine is the goal. More air flow along with the appropriate amount of fuel will result in more power producing potential.

With that idea in mind, let's look at some ways that the performance of scooter engines can be increased. This can be a big one! Recalibrating your CVT modification will not increase the actual power output, but it has a high performance-to-cost ratio.

Most mod kits for gas scooters will also come with new parts for the CVT. A properly calibrated CVT can significantly increase the overall performance. The front driver pulley variator can be recalibrated with different roller weights to vary to overall RPM of the engine under driving conditions. Lighter roller weights will increase overall engine RPM. Heavier roller weights decrease engine RPM. Roller weights can be found for the cc GY6 in the range of probably 8 - 15 grams or so.

Somewhere around grams would probably be a good starter experiment for heavier go karts. Lighter scooters may want to have a little heavier roller weights.

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. 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.

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.

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. Don't go too far though.

Too high an RPM and you might be way out of your powerband. Also, too high of an RPM can be annoying while cruising with low engine loads.

It can feel like driving your 5-speed car in 3rd gear on the freeway. The buzzing of the RPM at all times can be annoying to some people. Kevlar Belt - Depending on whether your cc GY6 engine is a short or long case, you will need to upgrade your belt to a Kevlar belt to accomodate the extra torque from the rollers weights and torque spring.This horizontal single cylinder, four stroke, forced air cooled engine has a CTV automatic transmission and is used on many scooters, ATVs, buggies, go karts and mopeds.

This engine has a displacement of Click on the parts for additional pictures. This belt is made of Kevlar. Our best and toughest belt! Note: Scooters with a long case usually have a 12" - 16" rear wheel. Save time and money, go for quality every time. This has a quality urethane flange and clamp. This will fit just about any scooter, quad, moped, buggy, ATV, dirt bike, etc. This is a very high quality washable Dual Layer 38mm, small profile Performance Air Filter for high air flow that clamps on to your carburetor to ensure a tight clearance fit.

This is a very high quality Dual Layer 38mm, small profile Performance Air Filter for high air flow that clamps on to your carburetor to ensure a tight clearance fit. This head is the minimium required to do the cc upgrade to the GY engine. These come in various sizes depending on your application. Mechanics Note : If you increase the size of your stock carb jet you will want to improve your air flow both in and out of the engine. For smaller upgrades replace the stock air filter with a Performance Air Filter for this engine.

If you upgrade beyond small adjustments you will want to install a Performance Exhaust System to handle the increased combustion and minimize back flow issues.

Altitude can play an issue in scooter performance. When you are dealing with elevation you will want to rejet to prevent your engine from siezing and requiring a rebuild. You will want to go down one 1 jet size for every ' to ' you go up in elevation. When the air is colder it requires bigger jets because cold air is more dense. If it is 50 degrees colder you would increase your jet size at least one step up.

If you don't, your engine may sieze on you. First, be sure your battery is fully charged and your fuse is good. Using this CDI pin configuration: [ 1 2 ][ 5 ] [ 3 4 ][ 6 ] with a voltage tester and leaving everything hooked up normal, go in through the top, through the wires until you have contact, check the 6 pin to see if it has 12v present?

GY6 50, Performance, 4-Stroke (139QMB 1P39QMB)

If not voltage then it is an AC system. Your AC system can have over 50v AC while cranking. This performance clutch bell housing fits a performance clutch. It will often be too large for a OEM clutch. We have the matching Performance Clutch part number available for your convenience. This great looking bell will not only perform well, but will keep your clutch running cooler.

This transaction is for one set of 3 1.Scootertronics experience in repairs and upgrades for all types of scooters from Vespa Piaggio Yamaha Honda Linhai GY6 and CN scooter and go cart engines plus ATVs gives Scootertronics the knowledge and expertise to get you the correct information to make an informed purchase. GY6 50 Carb Upgrade. Naraku Performance Carb. GY6 50 Racing Air Filter. Uni-Filter Dual for GY6 Mikuni High Flow Fuel Pump.

GY6 50 39mm Air Filter. Dr Pulley Variator GY6 Polini Variator Kymco 4T. GY6 50 Kevlar Belt. GY6 50 Racing Clutch. GY6 50 Golden Variator.

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GY6 50 Performance Clutch Bell. GY6 50 High Performance 50mm Head. GY6 50 Performance Exhaust. GY6 50 Titanuim Performance Exhaust.

gy6 clutch upgrade

GY 6 50 Magneto Puller. Shinko Scooter Tire 3. Scooter Grips from NCY. GY6 50 Racing Clutch Bell. GY6 50 Performance Trans. GY6 50 Chrome Case Cover. Torsion Control Malossi. GY6 50 Performance Gears. Choke Conversion CVK. Piston QMB 52mm. GY6 50 52mm BBK. GY6 50 Performance Air Filter. Gy6 50 Tecnigas Silent Pro. Leo Vince GY6 50 Exhaust. Arisal High Compression 50mm 4T Piston.Stock clutches are simply not very good. Dramatically increases Power and Speed by replacing the stock clutch.

Most manufacturers use the cheapest belt available at the time of production. Factory OEM Replacement. Features lightweight reinforced clutch blocks and fiber reinforced shoes for long life and amazing grip! Dramatically increases Power and Speed by replacing the stock clutch Page 1 of 2 Page 1 2. Corona Update Sign In Register.

We recommend upgrading to this Premium Kevlar Belt whenever possible to prevent slipping and power loss. A stiffer Main Clutch Torque Spring shifts the CVT system faster, giving you more power when coming out of a corner or going uphill without decreasing your top speed!

An inexpensive upgrade that can increase the responsiveness of your Buggy. Polini's 3G Maxi-Speed clutches have allen screws for adjusting preload on the clutch springs without having to remove the clutch from the engine!

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GY6 50 High Performance Parts

Show: 16 40 80 JavaScript seems to be disabled in your browser. You must have JavaScript enabled in your browser to utilize the functionality of this website. Although GY6 isn't a bike itself, but is rather the designation for a popular generic engine in Asia.

These engines and generic scooters housing these engines grew in popularity over the years from its reasonable costs, performance capabilities, and potential. Because of this, you'll commonly see these bikes log thousands of miles as they are.

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While on the other hand, the GY6 is the foundation for a completely custom build to be mounted on a more popular chassis. However, because it is a generic engine, there are a multitude of makers and all with their own differences. Read more. The GY6 being a generic engine, it sometimes causes disinterest when compared to more popular brands that have a stronger standing such as Honda, Yamaha, Aprilia, and so on.

But for many of us, we reach a point where brand names are of lesser concern, and instead we have the sentiment of wanting to wrench, see what we can do with creativity and hard-work, enjoy the friendly competition of what we can produce, and at times it's as simple as Ricky Bobby says in Talladega Nights, "I WANNA GO FAST!!! So whether you're looking to just be cheap, want to see what your wrenching can do, or you just want to go fast, the GY6 is the thing for you. The great thing about the GY6 being a generic engine is that it is also a highly versatile engine to build on.

Its popularity and vast induction has led to it to have many producers of aftermarket parts and a variety of types of products. This is what has led it to also have extremely competitive pricing that will go a long way with potentially less damage on your wallet. We have complete kits, partial kits, and individual components for a variety of GY6 builds.

gy6 clutch upgrade

We can help you with a full engine swap or upgrade, from cc to cc, to cc, and most popular and in extremely high demand are our cc builds. These are one the biggest and still reliable kits you'll find on the market. When we do our engine builds, sure you might see us with an apron on, but we're nothing like the chefs you see on cooking channels, we're not chopping and tossing things together or adding ingredients until it seems to taste right.

We're more like the mad scientist, measuring everything twice, and sometimes thrice depending on what step we're at. Before we begin the build, you'll see the specs, measurements, and ingredients going into it. When we say you're getting a cc, we've got the measurements to assure you of it, and when you ride it, you'll feel it!

NCY Clutch Bell (GY6)

Call Us Nice to know their quality are already improving its good for the consumer of the products. Chinese ATV Parts. It is helpful, we too deal with the same. The performance enhancement of vehicles mostly depends on it mechanic and the spares they use. Performance UTV Shocks. Thanks for your tips.

Some how I have benefited by your tips. Keep posting your valuable knowledge. Thanks again guys… Hi, you make mind blowing ideas and a spectacular article here.

Last time, when I saw your site this was a little better but today I visit the web site again and find that you guys making a very smart work on the site. Today Web surfing is running very fast and a huge competition over the web is spread. So it is quite interesting. Thanks… atv performance parts. This is typically a computer systems. The motivation for such activity is called a performance problem, which can be real or anticipated.

Most systems will respond to increased load with some degree of decreasing performance. A system's ability to accept higher load is called scalability, and modifying a system to handle a higher load is synonymous to performance tune-ups.

To more details please see at: performance tune-ups. We found this weblog very great and we wanna thank you for that. We hope you keep up the great work! Performance Upgrade. Looking for vespa parts, we provide the original and guaranteed material about parts related vespa. Here are available all options related to malossi parts and Honda forza or performance scooter parts. I have the stock gy6 in it but i want to upgrade for better performance.

Absolutely brilliant INFO.

Papa louie 5

Many thanks. Any idea of what the stock speed is of my Hi bird Necht cc which I've just bought.

GY6 High Performance Clutch Install / Chinese scooter / Lancer 150

Before I start nodding it. Not road legal yet. I meant modding sorry. And also I have a 4 pin cdi Unit on mine. Struggling to find a performance cdi that has 4 pins.

Hi there, I want to know more about the clutch updates? I replaced the clutch and belt with a stock unit from E bay but it seems a bit sluggish out of the hole I want to increase the snap out of the hole. Where do I get the stuff you mentioned? I live in canada BTW.We've launched an improved GY6 Technical Center for ! We're in the process of bringing all of these old articles to the new system.

Check it out for new content you won't find here! Transmission Upgrades The GY6 CVT transmission is composed of several key components: variator, roller weights, clutch, and the contra spring. Roller weights provide the up shifting forces for the CVT transmission by flinging outwards within the variator in varying stages of engine RPM. Roller weight tuning is a matter of preference and riding terrain. A lighter weight will fling outward slower than a heavier weight, slowing the up shift process.

The stock These are our notes regarding tuning and roller weights. However, this light weight will reduce top speed by mph, and also kills acceleration.

Best for hill climbing, mud, sand, water and other loose terrain. Spins most stock tires from a standstill with other supporting CVT mods. Good sustainable low-end power and optimal acceleration on hard-packed terrain. Does not reduce top-speed.

Best for pavement racing. Terrible low-end torque when compared to 9 and 10 gram weights. Otherwise they function the same as 10 gram weights. Best for loose terrain racing. I recommend trying different roller weights to see what you like best.

We carry 8 - 13 gram roller weights in the BD Online Store.

gy6 clutch upgrade

CVT tuning is all about balancing the roller weights with a proper contra spring. The RPM spring increases the tension on the belt and rollers.

This delays the transmission from up shifting too soon and also reduces belt slippage. The RPM spring itself increases and smooths out acceleration, low-end grunt, and maximizes back shift.

Even numbers list

This is best visualized when thinking about coming in and out of a tight turn. Slowing for the turn the RPMs drop, you then clear the turn and apply full throttle. This is where back shift plays in -- you want the transmission to down shift to the proper lower gearing ratio as soon as possible through the turn so the CVT won't be stuck in an up shifted state when throttle is reapplied coming out of the turn.

This helps keep the small cc engine nearer to its power band during demanding situations where the power train is loaded to the point of clutch slippage. These situations can be during steep hill climbing, towing, or when pushing the front end up over large obstacles. High engagement clutches provide better launch from a standstill as well.

Stock is mm. The Teflon coated ramp plate the ensures smooth operation and increased roller weight life. The mm and variators are designed with steeper roller ramp angles for an improved acceleration curve. This keeps you well within good power range even at low speeds, and optimizes acceleration RPM when flooring it. Will be very helpful during my upgrade process. All thats missing is "How does tire and drive gear size, play into this formula?

Now it's time to research the work involved! Please note: Our staff does not typically provide support in the comments section.

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