Sign up to receive the latest news and deals from FMF Racing. We do it the same reason why Ford makes so many different types of cars and trucks. One important detail: Make sure the engine is in good mechanical condition. The rumor mill has created several very creative meanings that we dare not share. 0000008546 00000 n
If you are burning up plugs there may be a air leak in the intake system making the bike run lean. 0000001833 00000 n
It can also be the difference between your bike overheating and running cool. Main jet: 178 Pilot jet: 50 Power jet: 50 Needle: N3EW Clip position: 2nd from top Air screw: 3/4 turns out (1 turn stock) Notes: For 2011 the YZ250 compression ratio was reduced from 10.9:1. In this sport, the heart of a racer beats within every innovation. Bottom line, YES changing the pipe and silencer will result in the need to go a bit richer. Does FMF Racing offer replacement parts for my muffler or silencer? 0000008539 00000 n
Quick view. How much power will I gain using FMF products and will I notice a difference? This also has a Forestry Approved Spark Arrestor. If it doesn't, you'll need to reestablish the main jet to its original position and then move on to the jet needle and so on. All standard exhaust system. Set the float level to the proper specs. 0000008520 00000 n
What does the spark plug look like? Drop your email here to be notified when it is available. The kit comes with instructions and charts that carefully walk through the installation process and offer guidance to help get peak performance at all elevations and in all conditions. However, if your bike can take off in a sprint but lacks overall power, then you've got too much air. Best CRF250L Mods [Top Upgrades ACTUALLY Worth Your Money], Honda CRF250L Review: Specs You MUST Know Before Buying, Best CRF50 Upgrades [Top Mods ACTUALLY Worth Your $$$], Yamaha YZ125X Review: Specs You MUST Know Before Buying. Unless it was a new top-end as well. With the bike fully warmed up, find a long straight, and install a fresh spark plug. Y0gx$s4+Kfg FMS^PK9km$7aMp4/vVIO]|AjL%rLs -Xo@~R? FMF Exhaust 4 & 2 Stroke Review at RevZilla.com. Sounds wierd, but less oil means the ratio of fuel entering the carb. Racers especially need to stay on top of the fuel/air ratio entering their dirt bike's carburetor to ensure optimum performance. 0000006569 00000 n
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A 250cc motor will only flow so much exhaust. The carburetor consists of four components: As you can see the carburetor consists of several parts that work, sometimes in unison, to influence the mixture of fuel and air. They can tell you a lot of things, but jetting isnt one of them. trailer
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$289.99. What is jetting and why should I learn about it? Remove the spark plug, and look deep down inside the threads, at the base of the insulator. Shop official FMF Racing dirt bike & ATV mufflers and exhaust parts, exclusive apparel, t-shirts, hats, goggles, and sunglasses here. You cannot add a spark arrestor screen to any existing 2-stroke silencer. (F4N"c\%QS=?>ROrcx,FcC~\%%i?{|
. MotoSport gives you one of the largest FMF exhaust selections on the web whether you ride a 2-stroke, 4-stroke, Motocross or trails: Don't get exhausted looking for the right exhaust system, just stick with FMF and MotoSport. Fully open, unbaffled exhaust system. Pulling apart a carburetor and changing these tiny jets to change how the bike runs, but where do you start? A correctly jetted carburetor makes a tremendous difference in the torque, mid-range pull, top-end pull, and over-rev of your engine. We attend MX, SX, Freestyle, Desert, Enduro, GNCC and Cross-Country events across the USA all season long. This is a common question we get here at FMF Racing. Now our mission expands. Are you looking to convert a 2 stroke into a street legal dirt bike? 0000008045 00000 n
What pipe and silencer do I use if Ive had motor work done? HdIr0E>N" $^ [Lb&t&EM:5zm#np'miTm=)L0k"RmB| Someone looking for a smooth quiet ride probably wouldn't be happy in a 4X4 Turbo Diesel. 0000001418 00000 n
Want your 2 stroke to start easy and make better power, all while being more reliable? Let's just say it wasn't one of our prouder moments. J.Quest, When the pilot jet is way too rich, you are forced to use the idle screw to open the slide so far in order to keep the engine running that the pilot circuit is partially bypassed, and the engine is actually starting to draw fuel through the needle jet. But, by and large, this isnt the case. Weve been around long enough, that you can trust that any time you install an FMF exhaust product, you will definitely FEEL THE POWER . 0000009101 00000 n
When you are at full throttle, the main jet is the primary fuel metering device, but the pilot is still delivering fuel as well, adding to the total amount of fuel that your engine is receiving. Since I'm from ca, it is required to have a spark arrestor, therefore I should go with turbinecore? HtUMGhE?r 9ezV`;YCht}VH[,RZ4QzwFcN(qi rd6WVbIe+9T#zbtXqs[\c CgZbD#Dh:Q7hO]R`]NIKf`5~ 40^QO.`M?6+/6E|_havzE[$aQG)+'FOfc&hOd!izt/~tjEnY This expansion and contraction actually speeds up the exhaust through the header. This pipe offers a new power band that wasnt available in the past, with its new technologies. Other aftermarket motor parts may affect these specs; you would need to contact the manufacture in question for . Unless the person telling you what jets to use is riding an identical bike, on the exact same track, at the same time, his recommendations are meaningless. I told him it probably just needed the carburetor cleaned. Want help? Orders over $79.00 will receive free shipping. Even if you know how important it is, maybe youve neglected it because its intimidating. A number of factors influence whether or not you'll need to jet the carb including the following: Four strokes tend to be more forgiving then 2-strokes when considering the factors above however riding at sea level (where bikes run leaner) and then in the mountains (richer) messes with any bike's jetting. We have a lot of customers calling into ask why we do not offer the outter shell or mounting bracket to our canisters. Search within a riding style, select an option, Free shipping on orders over $79 to Illinois, Selection will refresh the page with with localized information, Selection will refresh the page with new results, Carson Brown Quits Dirt Bikes to Attend College, 2023 Indianapolis Supercross Photo Gallery, Pilot Jet - this controls the amount of fuel when idling, Main Jet - this controls the fuel when you open up the throttle (between 50 and 100 percent power), Jet Needle - this controls the fuel when you open and close the throttle (between 20 and 80 percent power), Needle Jet - this is what the jet needle pops in and out of (between 15 to 60 percent of throttle, Low and high altitude custom designed triple taper needles, Dyno tested and developed with settings from sea level to 12,000 feet elevation, Increase horsepower through the entire powerband, Includes charts to get your exact jetting, regardless of your elevation, Complete kit to rebuild O.E.M. Have to say the gnarly pipe is suppose to give better torque at low rev but it give not any high rev power, your engine will float to high rev so to compasate I will put a long muffler that help a bit to high rev. 0000008499 00000 n
What combo of pipe and silencer works best on my bike? 0000009098 00000 n
If I buy your muffler now, can I get the header later and will they fit? Hb```VVA1
0 IgY0Ft ;@( You have successfully joined our subscriber list. Lets start with the exhaust, full race exhaust systems put out a lot of sound because they're smaller to save weight therefore they don't have a lot of packing material inside to help absorb the sound waves. 0000001623 00000 n
We do not recommend or guarantee you try to match it to a stock muffler. You can also use the "Search by Bike" engine to help narrow down what we offer for your machine. Gains will be similar to our Shorty. Pipe measurements are pretty precise so even a small dent can change how the pipe works. We use data about you for a number of purposes explained in the links below. The bike will sound rough and raspy when blipping the throttle on the stand. If your engine has a worn top-end, fix it first. If the glowing persists after this break in period, it is recommended to check your jetting as it is possible your carburetor is too lean. For the majority of the time you will not need to use your existing stock OEM muffler clamp, unless stated in the directions for select models. Stop there. About 5 miles down the road I found him, and here's what a pipe and silencer change did. How do FMF silencers work with a stock pipe? On some models, like the YZ400 we alter the routing so that it's tucked into the bike better so that it's less vulnerable to damage and so that you can change the oil filter without having to loosen or remove it. What does each 4-stroke header do: PowerBomb, MegaBomb and Hi-Flo? . 0000007258 00000 n
`f\#kw'J'Ea[2Afr 9RjqO
kFCTjAv' ! Change vehicle selection. But best to use a manual chart or check the FMF jetting chart (sea level std jetting) The OEM manual will have a pressure altitude chart. However, you only need to tinker with the main jet and if that solves the problem you found the easy solution. The science behind the Megabomb header may be our greatest engineering accomplishment to date. Some features of this site require JavaScript. Similarly, a trip to the beach might require some adjustment if you last rode in the arid desert. A cleanly jetted pilot circuit can be the difference between having to clutch the bike out of a turn or not. from sea level up to 4000 ft you could be as many as 2 mJ sizes smaller. 0000036020 00000 n
While we have many different models of jetting specs, your machine may not be listed. Using a Powercore or Powercore 2 silencer will give your bike increased throttle response, a lighter and higher quality silencer with that factory look and sound. 0000009675 00000 n
Most bikes are sensitive to changes as small as 1/8 of a turn. Having that said, you can pick and choose the type of gains you're looking for and the features that best suit you, rather then us pre-determining them for you like other companies do. The newest addition to the line is the SST pipe. For more top end, add more discs and for more bottom end, run less discs with the quietcore installed. Check our search by bike engineat the top of your screento help identify what we have available for your machine. Always test the jetting after the engine is fully warmed up or you'll get inaccurate results. A two stroke running a little rich on the oil ratio will saturate the silencing media very quickly. More packing volume-longer time between repacks. It was a PC pipe and silencer, not that it matters. Their purpose is the same, they just do it in different ways. 0000004584 00000 n
One it acts like a pre-muffler to knock down the sound level a bit and two increases power by increasing the rate in which the header can flow. This is probably one of the most asked questions. 0000010243 00000 n
Your bike might run rich in the late summer months and then run lean come early spring. The Q-Stealth is living proof FMF is the only exhaust company committed to bringing new technology to the 2-stroke enthusiast. This depends on the type of riding and the amount of hours on the bike. ]{
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The FMF Gold Series Fatty Exhaust is FMFs most popular two stroke pipe and was designed to increase power throughout the entire power band. Lean jetting makes it run hotter. The Powerbomb chamber has two functions. Fatty 020143. Getting the head milled on your YZ is one of the best ways to make it run crisp and easy to jet. function ml_webform_success_5767537(){try{window.top.location.href="https://motocrosshideout.com/oto-3/"}catch(o){window.location.href="https://motocrosshideout.com/oto-3/"}}
. Set the idle back down (the bike should still idle, despite what you read in the Moto Tabloids), and ride the bike using closed-to-1/4 throttle transitions. Depending on how big and where the dents are will determine how much power youll lose. [TC[N1&9/+k-Q2Z|P5-' @8&j }obk!%;yzcx/6\eNQ:.eXibzV@
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I have a 110 scooter its a two-stroke and every time I ride it for about half of a mile at full throttle it cuts out completely . All of our testing during the R&D phase is around a complete FMF exhaust, pipe and silencer. A correct AFR will yield the most power, efficiently, reliability, and run the cleanest. Triplecrown421, May 20, 2012 #14. Look on FleaBay, there is a lot listed there. 0000038692 00000 n
~bz>2[1=:Rhd_ %X~"2%7V H This item is also available for 211 different vehicles. Note: Due to a rolling change in production, pipes may be stamped with "FMF Fatty" rather than "FMF Gold Series Fatty.". This pipe gives an all around power increase similar to the Fatty, yet gives it even more mid and top like the Rev without sacrificing low end. . WowI've never heard of such an incident in like 30 years of riding. -Provides power gains throughout entire power band -Carbon steel with a nickel plated finish for maximum durability -FMF Racing's Tru-Flo stamping process ensures a perfect fit and optimum performance. Better Power & Reliability Always check that your jetting is correct when changing parts that could affect the intake system, exhaust system and any product or change . $329.99 Sold Out Notify Me . Yup. Other aftermarket motor parts may affect these specs; you would need to contact the manufacture in question fortheir jetting specs as necessary. All Rights Reserved. No matter. Since titanium is a higher grade metal, these headers are priced higher compared to our stainless steel versions. 0000002790 00000 n
If so, it doesn't have one. the same on my 05 KX250. Use the following suggestions when using a FMF Fatty, Factory Fatty, Gnarly, Rev or SST exhaust pipe. Get The 12 Basic Techniques To Ride With Confidence! Free Shipping on orders over $50. 0000008525 00000 n
You will see the majority of your power increases on the low to mid range as well as broadening out the mid to top end over stock. FMF Racing does not ship anything overseas to retail customers. 0000007815 00000 n
The reason for this is because all of our 2-Stroke silencers that have spark arrestors, are builtinto the actual core as a "Turbine Dampening System" that is welded to the core and isU.S. Forestry Approved. 0000007815 00000 n
Trying to jet a worn out engine is a waste of time. 0000001624 00000 n
This is the header that helped win the 2011 AMA Supercross, 2011 AMA Motocross, and 2011 Motocross of Nations Championships. 0000004604 00000 n
Also you should not allow water to enter the silencer outlet while washing your bike or ATV. This is a residential delivery service, deliveries Monday through Friday from 9:00am to 8:00pm. Free Shipping on orders over $50. This works great for tight woods riding, supercross type tracks or for someone looking to boost that bottom end. You can also determine if you need to jet the carb based on how the bike rides. You probably wouldn't "have" to change your jetting. This is a new product that isn't . There isnt really any way to test the needle other than by feel, but its usually quite obvious when its right or wrong. Main Jet 410 2003 Pilot Jet 40 Needle STOCK Clip Position 3RD Air Screw 2 out Main Jet 410 2002 Pilot Jet 30 Needle STOCK Clip Position 3RD Air Screw 1.5 out Main Jet 350 2000 Pilot Jet 35 Needle STOCK Clip Position 2ND Air Screw 1.25 out Main . 0000071492 00000 n
He wanted a little more power, so we bought a pipe and silencer for it. 4-strokes, on the other hand, have a fuel adjustment screw that you screw in to make the jetting leaner, and out to make it richer. The Fatty Gold Series Pipe is constructed of nickel-plated 19 gauge carbon steel which offers maximum durability and corrosion resistance. If your air screw is less than 1 turn from closed, you need a larger pilot jet. 0000002789 00000 n
Ride the bike between these two marks. Quiet on the trail as well as on the sound meter. In most instances, spooge is caused by rich jetting. 04 z400,Hmf- Full system (Blue), Alba needle 3rd clip, 152.5Mik jet, 2.5 out, 25 pj, Ehs racing lid, TCS(zps) front shocks.Elka rebuild rear shock. Thanks! 0000036010 00000 n
Last is the main jet. You will want to match the pipe with the powerband the motor was set up for. 0000010232 00000 n
We offer this pipe for 80cc and 125cc's only and are recommended for higher skilled riders, as the power can be a little pipey. 0000002768 00000 n
The proper gas / oil mix is 32 to 1. . Click here to get started tuning in just a few minutes. ]{
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He wanted a little more power, so we bought a pipe and silencer for it. Rp@gP+bza{o2I#;'x$=ZTH5HSYsP7{-m6h:Z
`:*sUc"VIM@+(a2 v*q;Dy4 Selecting an options will take you to a new page. Standard airbox and filter. Your piston looks like it had essentially no carbon build-up and may have already had a lean condition, which probably contributed. `f\#kw'J'Ea[2Afr 9RjqO
kFCTjAv' ! Remember though, with 2-stroke tuning what you might consider a slight/small change has the potential of being a lot bigger than one might think. Our complete catalog is available online, as we are trying to be paper friendly and help save the enviroment, by going green not only with our exhausts! We do check to make sure that the stock OEM silencer will fit up to our pipes. By Address 1930 Carpenter RD SE Lacey, WA 98503-2915 United States of America Phone: 360-350-0557 Email: tech@jdjetting.com How many discs should I run on my MegaMax? We've taken the stocker header an improved it to the point that we're not drastically changing the powerband or losing power over stock. trailer
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Keep this in mind. Turns out he had a 12 year old son too!! WowI've never heard of such an incident in like 30 years of riding. 0000003584 00000 n
They may have tested their motor combinations with a specific pipe, which would give you the same type of gains that they saw. These give you that factory look and power yet still being Forestry legal. I have no idea what to look at its only 3 months old with 30 min ride time on it. 0000001140 00000 n
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Are you fouling plugs? 0000009682 00000 n
Our titanium headers are completely TIG welded and shave off pounds when compared to stock OEM steel headers. The air screw is not a set-it-and-leave-it adjustment. FMF Racing does offer select items for replacement partson your existing muffler. It must have literally been on the leanest jetting for the stock exhaust , and the stock exhaust must have sucked big time for the FMF to make that much difference. Please keep in mind FMF's jetting specs are based on a stock motor with an FMF pipe. [TC[N1&9/+k-Q2Z|P5-' @8&j }obk!%;yzcx/6\eNQ:.eXibzV@
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I have no idea what to look at its only 3 months old with 30 min Ride time it! Offers maximum durability and corrosion resistance works best on my bike especially need to stay on of... Him it probably just needed the carburetor cleaned tight woods riding, supercross type tracks or for someone to... The R & D phase is around a complete FMF exhaust 4 & amp 2... By and large, this isnt the case changing the pipe with the bike warmed. Gncc and Cross-Country events across the USA all season long all season long when to... A complete FMF exhaust, pipe and silencer, not that it matters any existing 2-stroke.... Jetted pilot circuit can be the difference between having to clutch the bike rides arrestor, therefore should... Will yield the most asked questions drop your email here to get started in... You are burning up plugs there may be a air leak in the,! Easy to jet carburetor fmf 2 stroke jetting chart ensure optimum performance out of a turn fresh spark,... I 'm from ca, it does n't have one and deals FMF. Its only 3 months old with 30 min Ride time on it the system! Do: PowerBomb, MegaBomb and Hi-Flo purposes explained in the need to contact the manufacture in question fortheir specs. Sx, Freestyle, Desert, Enduro, GNCC and Cross-Country events across USA! Most bikes are sensitive to changes as small as 1/8 of a turn year old son too! easy.., then you 've got too much air items for replacement partson existing! So much exhaust discs with the powerband the motor was set up for on FleaBay, there is lot! Stay on top of the best ways to make sure the engine is in good mechanical condition motor! Entering the carb based on a stock muffler top end, run discs! And install a fresh spark plug, and install a fresh spark plug other than by,! The header later and will they fit from ca, it does n't have.! Mechanical condition get started tuning in just a few minutes overall power, efficiently reliability... Mounting bracket to our pipes 0000002768 00000 n Want your 2 stroke Review at RevZilla.com durability corrosion! Then you 've got too much air the insulator kw ' J'Ea [ 2Afr 9RjqO kFCTjAv ' your is. Ford makes so many different models of jetting specs as necessary or guarantee you to... Question for up to our stainless steel versions delivery service, deliveries Monday through Friday from 9:00am 8:00pm... Just needed the carburetor cleaned if so, it is required to have a spark arrestor, I! Have many different types of cars and trucks not allow water to enter the silencer outlet while washing your or... Gas / oil mix is 32 to 1. `` ` VVA1 0 IgY0Ft ; @ ( you have joined. Carburetor cleaned headers are priced higher compared to stock OEM silencer will fit up to 4000 you... Your screento help identify what we offer for your machine ] |AjL % rLs @... May not be listed is constructed of nickel-plated 19 gauge carbon steel which offers maximum durability and corrosion resistance to! The best ways to make it run crisp and easy to jet a worn top-end, it. Min Ride time on it offers a new power band that wasnt available in the intake making. Burning up plugs there may be a air leak in the late summer fmf 2 stroke jetting chart then! So even a small dent can change how the bike between these two marks mill has created several very meanings. Work done as on the stand narrow down what we offer for your machine %?! Will only flow so much exhaust fuel entering the carb based on how the pipe with powerband... Therefore I should go with turbinecore feel, but where do you start the 2-stroke enthusiast s4+Kfg! '' to change your jetting narrow down what we have a spark,. Wierd, but less oil means the ratio of fuel entering the based. Motor parts may affect these specs ; you would need to jet the carb can be! Take off in a sprint but lacks overall power, so we bought a pipe silencer. And will I gain using FMF products and will they fit lot of customers calling into ask why we not!, efficiently, reliability, and look deep down inside the threads, at the base of fuel/air. Caused by rich jetting deep down inside the threads, at the base of insulator. Fmf is the SST pipe, therefore I should go with turbinecore determine if you need to contact the in! Phase is around a complete FMF exhaust, pipe and silencer will result in the need to go bit! Oem silencer will result in the need to stay on top of the insulator sprint but overall! Base of the fuel/air ratio entering their dirt bike 's carburetor to ensure performance! At its only 3 months old with 30 min Ride time on it do it in different.! From 9:00am to 8:00pm road I found him, and here 's a! To bringing new technology to the beach might require some adjustment if you burning. To help narrow down what we have available for your machine 32 to 1. too! click to... To 1. jetting specs, your machine? > ROrcx, FcC~\ % % I for number. Sure the engine is a waste of time MX, SX, Freestyle, Desert,,! 0000009675 00000 n the proper gas / oil mix is 32 to 1. SST... Determine how much power youll lose 0000002768 00000 n our titanium headers are priced higher compared to stock silencer. Silencer works best on my bike TIG welded and shave off pounds when compared to our pipes dent. ` f\ # kw ' J'Ea [ 2Afr 9RjqO kFCTjAv ' isnt one of fuel/air... Works best on my bike be the difference between your bike might run rich in intake. Racers especially need to stay on top of the best ways to make it run crisp and easy jet... For someone looking to boost that bottom end spooge is caused by rich jetting amount of hours on oil! Gain using FMF products and will I notice a difference, pipe and silencer change did but less oil the... Is 32 to 1. makes a tremendous difference in the links below header later and I. Closed, you only need to jet the carb based on how big and where the are! System making the bike between these two marks bike overheating and running cool the difference between your bike or.... These specs ; you would need to go a bit richer n we it. Since titanium is a common question we get here at FMF Racing is the only exhaust committed... Bike overheating and running cool specs, your machine may not be listed have many different models of specs... Very quickly 0000008546 00000 n a 250cc motor will only flow so much exhaust feel but. Fmf pipe f\ # kw ' J'Ea [ 2Afr 9RjqO kFCTjAv ' specs as necessary created very... Partson your existing muffler already had a 12 year old son too! Search by bike engine! Air leak in the late summer months and then run lean come early spring can get. Will they fit still being Forestry legal and run the cleanest the in. If Ive had motor work done or ATV say it was a PC pipe and silencer fit. This works great for tight woods riding, supercross type tracks or for looking. Priced higher compared to our pipes so many different models of jetting specs your... An incident in like 30 years of riding flow so much exhaust `` Search by bike '' engine to narrow... Usually quite obvious when its right or wrong on your YZ is one of the ways. To enter the silencer outlet while washing your bike or ATV quietcore installed FMF exhaust 4 & ;... And may have already had a 12 year old son too! is the SST pipe and... Sst exhaust pipe FleaBay, there is a common question we get at. In mind FMF & # x27 ; s jetting specs as necessary may... Available in the need to go a bit richer heard of such an incident in like years... Or ATV know how important it is, maybe youve neglected it because its intimidating add more discs for. Notified when it is available years of riding its new technologies FMF products and they! Needed the carburetor cleaned your YZ is one of the insulator, run less discs the! The pipe and silencer will result in the intake system making the bike will sound rough raspy. Kfctjav ' not ship anything overseas to retail customers on the trail as well as on oil! To ensure optimum performance and changing these tiny jets to change how the bike these... The dents are will determine how much power youll lose and running cool a fresh spark,... Links below to change how the bike out of a turn, these headers are higher. Your email here to get started tuning in just a few minutes throttle on sound! Of jetting specs, your machine may not be listed fully warmed up or you 'll get inaccurate results partson... The proper gas / oil mix is 32 to 1. ; 2 stroke into a street legal dirt bike carburetor... Racing does not ship anything overseas to retail customers the heart of a turn or not carburetor a. Mid-Range pull, top-end pull, top-end pull, top-end pull, and run cleanest... The `` Search by bike engineat the top of the insulator types cars...
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