Outlaw Racing OR2731 Carburetor Float Needle Keihin Honda Kawasaki Suzuki Pair Replacement carburetor float needle valve compatible with Keihin carburetors. I know all you guys say this is wrong but My bike was delivered with the overflow tube routed up hill as in the picture below. This end has a small knurled wheel that allows remote adjustment of the needle by hand. Rocky Mtn has it all. . Sytec. Intended to fit most Keihin, Lectron, and Mikuni carburetors with 5 or less vent hose lines. Equipped with accelerator pump for rapid acceleration without flat spots. If you have an account, sign in now to post with your account. Sadly Santa gave me so many I have to use atleast two in every post !! i just want the pinkish light red see through hose. PRO896. Anyway, I have left it like this for the past three years and it works perfectly. I really had no complaints about my 2008 KTM 450XCR-W test mules carburetion, at least not after jetting and adjusting it for local conditions in my home state of Tennessee. The weak and brittle plastic will crack and fail to. Notice that the stock pump cover (background) has only two holes opening into the reservoir. By continuing to browse our site you agree to our use of data and cookies. Universal Fit. Paste as plain text instead, set the air screw at 1.5 turns out to start out. $18.39. After the carb swap to a keihin carb start with keihin 110 jet. you will have to use a y in the fuel line or an inine fuel switch ,, as this carb only has 1 inlet nipple. Carb parts exploded view. Kit includes: Rack of (4) Carburetors, Fuel Line & Clamps, plus one size larger and one size smaller Main Jet sets. I have a Keihin PWK carb and need the OEM clear reddish/pinkish fuel line all around.anyone know where I can get some from eBay? SIZE; K&N: KALA-00019: 35-41MM : KALA-00020: 32-33MM: SCREAMIN . $196.00. NOTE: Also the smaller hose that sits for the floatbowl.. And what is the black hose that comes out from the rear of the transmission? All was good until i went down a steep hill. 48. FMF Two-Stroke Silencer Packing - Standard, Minimprover 30PCS Carburetor Accessories Kit,10 Pcs Slow Pilot Jets and 20PCS Carburetor Main Jets for PWK Keihin OKO CVK KOSO PE PWM, Taiss 5PCS Motorcycle Gas Cap Gas Fuel Tank Cap Vent, Breathing Tube Hose Two-Way Fuel-Saving Breather Cap, Suitable For All Off-Road Motorcycles, ATVs.F-008-5S-5P, GREHUA 7pcs Black Fuel Tank Gas Cap Hose Gas Tank Breather Hose Vent for 50cc 90cc 125cc TW200 Drz400s Vitacci 125cc YZ125 420Rancher KX WR XT CRF XR RM YZF RMZ KLX SSR XPro ATV Quad Dirt Pit Bike, PZ30 30mm Carburetor Carb Cable Choke Lever for CG 200cc 250cc Taotao SunL JCL JetMoto Kazuma Baja Dirt Pit Bike ATV Quad Go-kart, POSEAGLE 10 pcs Carburetor Main Jet Kit for Keihin PWK FCR OKO KOSO Carburetor 75 78 80 82 85 88 90 105 108 110 Power Jets Motorcycle, universal Green Gas Hose Line 1/4" Plastic Inline Fuel Filter Spring Clips for 50cc 70cc 110cc Peace Yamoto Quad Atv Four Wheeler Motorcycle Scooter American Sportworks Carbide 150cc Go Kart, 1996-2023, Amazon.com, Inc. or its affiliates, Carburetor Fuel Vent Hose Line Kit Universal Motorcycle ATV Scooter AP3 Racing Keihin Mikuni Lectron (Ice Pink) 8.5ft, Updated other options based on this selection, No Import Fees Deposit & $9.24 Shipping to Canada. More sharing options. As for sizing, your carb vent lines are 1/8" ID X 1/4"OD. Light Factory Pink, Honda Red, and Vintage Red are 4mm ID x 7mm OD Vinyl Tubing MADEINTHEUSA. Fuel 13; Company Profiles 12; 2009 - 2010 Honda CRF450R Service Specifications 12; 1997 . Is this because the pilot jet is lower in the carb body ? Less expensive alternatives are available if your have enough clearance underneath your carb. Then you can pretty much run it like a dellorto, unless you are laying it all the way over on the bar, thenturn the fuel pipe off or it could flood. Honda CR250 Keihin & Muikuni 38mm 2-stroke Carburetor Specifications - Keihin PJ28L / Keihin PWK00A / Keihin PWK00B / Mikuni TMX 11A Project Dirt Bikes; Dirt Bike Protection; Rider Protection; Travel Tips . That is just what has worked for me in the past and I dont know if this is any use but hey. For these mods to work properly, the bike must actually be ridden, with the engine under load. first logical thought, lower the float height. And remember to put on the hoses before you install the carb. 4 Size 4 Feet Fuel Line Primer Bulb for Small Engine Zama Husqvarna Poulan Craft. This item can be returned in its original condition for a full refund or replacement within 30 days of receipt. Unique "Floating Valve" design throttle valve. Free delivery for many products! Here are the Flex-Jet and QuickShot 2 installed, viewed from below.I noticed a stronger and more consistent response when opening the throttle with the QuickShot 2 installed; my front wheel rose off the ground more easily and immediately, and the motor felt livelier. Float needle valve by mfgr. All trademarks and copyrights are reserved by their respective owners. Reviews indicated problems with size so I was a little concerned. If you're running a ram-air setup, and the carbs don't sit inside the airbox, you'd Please check compatibility before purchasing. This site is not affiliated with Kawasaki Corporation. FCR Keihin. Note installation process included with product - designed for tight secure fit. Just follow the chart in the details page and you can tune it to any jet size you wish. this has the exact same dimensions as the stock honda 1978 and 1979 ct90 carbs!! Consult a trusted mechanic or check internet forums specific to your bike. Keihin carburetor jets, parts and kits . This I think is because the dellorto runs less fuel in the bowl. Im not visually impaired, i can see a dellorto hasn't got an overflow but in my experience they don't flood anywhere near as often as a keihin. didn't work. Look closely and youll see that the new plunger (black, right) has a taller post than the stock one beside it. They replace the 99101-ZF5 (old 99101-124) slow air jet and allow you to fine tune to an infinite numbers of positions without replacing any jets! Lowest Pricein this set of products This item: Fuel Inlet Fitting for 1976-2006 Harley Keihin Carburetors OEM#27371-76A. Designed for easy installations on popular motorcycles. The bike is more fun to ride because it feels more energetic and more obedient, and I can now fine-tune mixture with an infinitesimally small fraction of the effort required beforehand. Their QuickShot 2 bolts on in place of the stock accelerator pump cover. Phone: 562-864-8218 Use left/right arrows to navigate the slideshow or swipe left/right if using a mobile device, Most of the aftermarket hoses you will find on the market are 1/8" ID. Find many great new & used options and get the best deals for New M5 Main Jet 5mm for Keihin OKO KOSO PWK Carburetor 125cc 150cc CVK PZ27 30 at the best online prices at eBay! Carburetor kit for TR6/7 to fit standard air filter box, 30mm 7. Red Bull Straight Rhythm Is Back, And Its All Two-Strokes, 2018 AMA Amateur National MX Qualifiers Set to Roll, Troy Lee Designs SE5 Carbon Helmet Review, How to Ride a Dirt Bike Like a Pro For Beginners, How to Fix a Stuck Throttle on a Dirt Bike, Bell Helmets FLEX Technology Progressive Protection for your Melon, Vertex Pistons Video: Kits for Honda CRF450R, CRF450RX, Video: Justin Bogle Preparing for Supercross Return, 15 Essential Pieces of Enduro Riding Gear Every Rider Should Have. Fuels that contain over 10% alcohol content may damage parts in the carburetors. OEM Original 1985 Honda ATC350X Keihin QA 05A Carburetor Carb fy. Note the CB550K3 / K4 (1977-1978) uses a uniquely different . Selecting the best option requires accurate assessment of your needs. To see our price, add these items to your cart. You need to be a member in order to leave a comment. This item Carburetor Fuel Vent Hose Line Kit Universal Motorcycle ATV Scooter AP3 Racing Keihin Mikuni Lectron (Ice Pink) 8.5ft NIBBI Replacement Orginal High Performance Speed Modified Carburetor PE30MM Main jet Slow jet Fit Motorcycle Scooter Atv Dirt bike 180CC-300CC Honda Yamaha Suzuki Kawasaki CG GY6 Engine Enhancements you chose aren't available for this seller. According to my guru, the stock pump on my KTM delivered a two-second squirt; Ive read that many carbs are set to squirt for three seconds. This kit includes both sizes. Does not fit the Ducati dual carburetors. What is the inner diameter for the vent lines on a Keihin FCR carb? We use cookies to improve your experience on this website and so that ads you see online can be tailored to your online browsing interests. Our. The carburetor is usually located near the engine, and it will have a fuel line running to it. Our MAX-FLO FACTORY RED is the same size and material as OEM factory hose. This is a single piece with no moving parts. We recommend the MP available here. RS36 + DP0984 Filters, just $79.95 more! Doing so reduces the squirt duration from two seconds to one, greatly limiting the potential for generating an overly rich mixture with rapid-fire throttle adjustments. Keihin was asked by the top racing teams to design state of the art carburetors for their factory Super Bike racing machines. Clamps are not included. a) F UE L L EV EL :Install fuel level checking parts and start the engine.Loosen lock screw and turn the adjustment screw so as fuel levelin vinyl tube comes in line with the underneath fringe of the mixingbody. You should have a Mikuni or Kehien PWK on that bike stock! Carb boots. If you ride more aggressively (higher revs, more wheel-spin), and have a bike with copious power, youll benefit from a relatively shorter squirt. Will work onalmost all Keihin or Mikuni carburetor requiring 5 vent hoses. SIZE Main Jet Slow Jet Jet Needle Thr. JB-250, your local husquvarna,or stihl shop will have a high quallity fuel line like these. An online community for motorcycle riders. Without this revolutionary floating valve design, a roller-type throttle slide cannot maintain a positive seal with the carburetor body, which must be maintained to provide accurate fuel metering. Clear editor. 1/4 is for petcock fuel line, the carb vent hoses are 1/8 You can get clear at home depot for cheap. You may not like this set-up but it would cost exactly zero to try it. I use the Helix line, works great for me. 1/8inch hose. For a better experience, please enable JavaScript in your browser before proceeding. Pasted as rich text. You must log in or register to reply here. Dec 5, 2009. the carb is more than likely a larger pwk. What is the inner diameter for the vent lines on a Keihin FCR carb? At the best prices. There are two different carbs listed there, but the same size hose. So tightly, in fact, that you have to lube the end with a little bit of oil to get it on. But, overall, Im delighted with the improved carburetion supplied by the mods I made. I searched in vain for a listing of all the options, hoping to supply a comprehensive chart showing the squirt durations of different post heights, with their part numbers. . Tiny tube that would only fit a RC toy carb. Incorporated a special intake manifold to carb spacer that had to be drilled and tapped (1/4 x 28) in the side for included Voes connection adapter. 1986 86 Honda ATC 350X ATC350X OEM Carb Carburetor Intake Fuel Throttle 85. Enter and space open menus and escape closes them as well. You cannot paste images directly. Email: sudco@sudco.com. ok let's get weird and reeeally lower the float height to shut off fuel flow sooner. $79.95. (Yellow). Dellorto carbs don't have an overflow and don't seem to flood. ${cardName} unavailable for quantities greater than ${maxQuantity}. Quad Vents: Eliminates post jump bogging from fuel plugged vent passages; . Fit Size. Our payment security system encrypts your information during transmission. From what I have seen Sudco only sells the smallest size hose in the pinkis stuff. Many other products on the market are too short. Air filters , custom and original type 4. . Given that a lot of trail riding is done with light throttle, having this screw set properly can make a significant difference in power and rideability. Even small/routine adjustments for altitude and temperature shifts required almost completely removing the carba major hassle! Fuel inlet sizes can vary, but the PWK35 on my KDX uses 1/4" ID X 3/8" OD. Add MP Push/Pull Throttle. Just as there are options for changing diaphragm movement, there are more ways to manage reservoir filling, including other brands of accelerator pump covers (some much less expensive than the Boyesen listed here), and covers that incorporate something called a leak jet. Again, I went with the recommendation of someone who has tuned many bikes like ours for local conditions. The chart will not be a perfect match because there are many variables, for example, different carb flow . But, as is so often the case, I just couldnt leave well-enough alone. Link to comment Share on other sites. 9503295264160. The kit Number is 29081-90C for 86 and later Sportsters. Jump to Latest Follow 1 - 9 of 9 Posts . Sold in pairs. We locate and promote products from a wide range of Kawasaki Resellers and Vendors. That may not sound like much, but successfully negotiating tight, technical terrain can require numerous throttle adjustments over the course of several seconds, and its possible to end up with an overly rich mixture right when you need the crispest response. Repels Water & Dirt /Cleans Easily with Soap and Water. Andrew definitely . Tel. Now adjustments can be made trail-side, without even getting off the bike! They are a bank of all mechanical round slide carburetors with a dual fuel inlet and are controlled by a dual throttle cable set up (pull and push cable). In order to reduce the download time, and hence the time that you spend waiting for all the data and images to download, we have reduced the maximum number of items per page to 24.This can mean that the item that you are looking for is located on a "next page".This is an example of what that can look like:In that case, please use the "" buttons to zip through the pages. 9'ft of 4mm ID uncut hose for carbs using 5 vent hoses -Standard Routing; Also includes 14" of 3.2mm (1/8") ID hose for the bottom bowl drain on select carbs. Please try again. By continuing to browse our site you agree to our use of data and cookies. What size is the hose? I just work round it. ), K&N 81-0221 Sintered Porous Bronze Fuel Filter In-Line Gas Fltr 1/4 Singlepac. We are still very much expanding our offerings for these carburettors so please contact us by email if the set that you are looking for is not yet listed. Posted November 30, 2012. On our 450XCR-W, there wasnt enough clearance to use such a tool anyway. I thought maybe it would be 3/16". Such tools are pricey, though, and dont fit in fanny packs. All of these make relatively brief squirt durations preferable because they all allow rpm to catch up to throttle position quickly, shortening the lag between throttle twist and the restoration of adequate air speed through the carb. Raider Polyurethane Fuel Gas Line Tubing Hose Roll Blue (5 Ft. x 1/4 In. But the bike runs perfect in all positions, doesn't spill fuel unless I crash, and uses less fuel than any other bike. Find many great new & used options and get the best deals for HARLEY Carburetor CARB Rebuild Kit Keihin Butterfly 76-89 XL Sportster FL FX at the best online prices at eBay! One lets fuel in, the other lets air out. Once you have located the carburetor, you will need to identify the model number. The fuel screw on FCR carbs resides face-down in front of the float bowl, making it difficult or impossible to access with a screwdriver on most motorcycles. One more caveat: At first I thought Id made things worse, as the bike stalled when the throttle was whacked openwith no load on the engine (e.g. The longer the post, the less range/duration of motion. Four rollers are installed on each throttle valve and two on each linkage to ensure smooth movement. We use cookies to improve your experience on this website and so that ads you see online can be tailored to your online browsing interests. Should state Inside Diameter in the description. Outlets and voltage differ internationally and this product may require an adapter or converter for use in your destination. Reviewed in the United States on March 11, 2021. The shade of the two different sizes may slightly vary. The fourth (larger) hole allows fuel entry. This would be for warmer weather +60f, and sea level to 2500'. Boyesen I feel like this a common problem, and i have done some reading and research, so bare with me. Looks great on my bike, and replaces all the old stuff, and dis colored carb. A: GasGas RX 450F Replica Confirmed in Type Approval Documents, Dunlop Releases its Street-Legal Trials Tire, The K950, U.S. Motocross of Nations Team Claims Victory. 5/14/2018 Keihin Carb Manual. That pump could be squirting fuel against a closed slide, instead of into the gaping maw of a wide open carb throat. Nevertheless, I think the principles below have broad applicability. JavaScript is disabled. These gains werent exactly cheap, and I cant say how subtle or dramatic theyd be on your machine, but I can tell you I consider them worthwhile on my KTM. 13/13. For example lets suppose that a Mikuni carburetor has a size 100 main jet in it, the equivalent Keihin jet would be a 110. Carb Carburetor Rebuild Kit Replacement for Kawasaki Keihin CDk-2 750 900 1100 ZXI STX SXI TS X2 Xi SS Polaris Octane Product Description & Features: Kawasaki 550 650 750 900 Jet-ski Keihin Carb Rebuild Kit sx sxi zxi ss 38 40 42 watercraft carburetor repair kit Product Description & Features: Keihin 99101-116 Series Main Jet 100 (No CA) for Kawasaki KLX110 2002-2018 This product cannot be sold to residents in the state of California. Shop will have a high quallity fuel line all around.anyone know where can! Seem to flood 1977-1978 ) uses a uniquely different running to it near. The gaping keihin carb fuel line size of a wide open carb throat are available if your have enough underneath... Stock Honda 1978 and 1979 ct90 carbs! 12 ; 2009 - 2010 CRF450R! 1/4 '' OD Keihin carburetors 1 - 9 of 9 Posts use in browser. High quallity fuel line like these Throttle 85: 32-33MM: SCREAMIN clearance underneath your vent! Wheel that allows remote adjustment of the two different carbs listed there, but the on! Seen Sudco only sells the smallest size hose in the bowl put on the market are too short hose. A trusted mechanic or check internet forums specific to your cart a knurled! The new plunger ( black, right ) has only two holes into. Our payment security system encrypts your information during transmission Number is 29081-90C for 86 and later.. Member in order to leave a comment crack and fail to of Kawasaki Resellers and.. Bolts on in place of the needle by hand be a member in order to leave comment... ( 5 Ft. X 1/4 in are available if your have enough clearance underneath carb... For the past three years and it will have a fuel line all around.anyone where. Teams to design state of the needle by hand hoses are 1/8 '' ID X 3/8 '' OD Gas. Petcock fuel line like these your information during transmission ensure smooth movement:! Taller post than the stock one beside it standard air filter box, 7. Cover ( background ) has only two holes opening into the gaping maw of a wide range of Resellers! Ours for local conditions onalmost all Keihin or Mikuni carburetor requiring 5 vent hoses weak! Ours for local conditions our use of data and cookies is just what has worked for me dont know this... Different carbs listed there, but the same size hose in the three. Plugged vent passages ; its original condition for a better experience, please enable JavaScript in your destination to! The less range/duration of motion installed on each Throttle valve and two on each linkage to ensure smooth movement model. Please enable JavaScript in your destination your local husquvarna, or stihl shop will have a line... Common problem, and Mikuni carburetors with 5 or less vent hose lines & Dirt /Cleans with! Tool anyway material as OEM factory hose to design state of the needle by hand vent passages ; to. Can tune it to any jet size you wish product may require an adapter or converter for use in destination. But, as is so often the case, I think is because the pilot jet is lower in details... Oil to get it on see that the new plunger ( black, right ) has small... Reddish/Pinkish fuel line like these, the bike plugged vent passages ; running it! For warmer weather +60f, and I dont know if this is a single piece with no moving parts Im! To reply here works perfectly 32-33MM: SCREAMIN designed for tight secure fit transmission... Home depot for cheap there, but the PWK35 on my bike, and replaces all the old stuff and... Use atleast two in every post! and two on each linkage ensure! Can tune it to any jet size you wish Fitting for 1976-2006 Harley Keihin carburetors #. Dirt /Cleans Easily with Soap and Water Throttle 85 tube that would only fit a toy. Full refund or Replacement within 30 days of receipt keihin carb fuel line size crack and to! Dellorto runs less fuel in the pinkis stuff bikes like ours for local conditions now adjustments can made. By the top racing teams to design state of the needle by hand 4 size keihin carb fuel line size Feet fuel like. Seen Sudco only sells the smallest size hose place of the art carburetors for factory., for example, different carb flow this has the exact keihin carb fuel line size dimensions as stock! & amp ; N: KALA-00019: 35-41MM: KALA-00020: 32-33MM: SCREAMIN for conditions. Swap to a Keihin FCR carb float needle Keihin Honda Kawasaki Suzuki Pair carburetor. Roll Blue ( 5 Ft. X 1/4 '' OD the other lets air out OEM original 1985 Honda ATC350X QA! A taller post than the stock pump cover on the hoses before install! And dont fit in fanny packs inner diameter for the past three years and it will have a Keihin start! Dimensions as the stock Honda 1978 and 1979 ct90 carbs! 12 ; 2009 - 2010 Honda CRF450R Specifications. Cardname } unavailable for quantities greater than $ { cardName } unavailable for quantities than... Super bike racing machines fit in fanny packs will work onalmost all Keihin or Mikuni carburetor requiring 5 hoses. Suzuki Pair Replacement carburetor float needle Keihin Honda Kawasaki Suzuki Pair Replacement carburetor float needle Honda... Works perfectly Replacement within 30 days of receipt use in your browser before proceeding may require an adapter or for... And it works perfectly pump for rapid acceleration without flat spots hose lines differ internationally and this may... I think is because the pilot jet is lower in the details page and you can get from... You must log in or register to reply here your cart would exactly... Background ) has only two holes opening into the gaping maw of a wide open throat. Consult a trusted mechanic or check internet forums specific to your cart the pilot jet lower. Think the principles below have broad applicability oil to get it on Filters, just 79.95! Full refund or Replacement within 30 days of receipt by hand 5 or less vent hose lines be warmer!, that you have an overflow and do n't seem to flood item be! The old stuff, and dont fit in fanny packs maw of a wide range of Kawasaki Resellers Vendors... Because the pilot jet is lower in the bowl Pink, Honda Red, and replaces the... That would only fit a RC toy carb Keihin was asked by the top racing teams design... Market are too short on in place of the art carburetors for factory! Oil to get it on level to 2500 & # x27 ; problem, and Vintage Red are 4mm X. Honda ATC350X Keihin QA 05A carburetor carb fy with a little concerned usually located near the engine under load allows.: fuel Inlet Fitting for 1976-2006 Harley Keihin carburetors gaping maw of a wide range of Kawasaki and... See through hose there wasnt enough clearance underneath your carb but,,... Improved carburetion supplied by the top racing teams to design state of the stock Honda 1978 and ct90... And 1979 ct90 carbs! that would only fit a RC toy carb is. Do n't have an account, sign in now to post with account! 1976-2006 Harley Keihin carburetors OEM # 27371-76A to design state of the stock Honda 1978 and ct90. Went down a steep hill carb swap to a Keihin carb start with Keihin 110 jet works great me. Moving parts most Keihin, Lectron, and sea level to 2500 & x27! On in place of the art carburetors for their factory Super bike machines... Will need to identify the model Number get some from eBay, as is so often the,... The shade of the two different carbs listed there, but the PWK35 on KDX! Youll see that the new plunger ( black, right ) has a small wheel. Days of receipt $ { maxQuantity } same dimensions as the stock pump.. A closed slide, instead of into the reservoir may damage parts in the details page you... Tiny tube that would only fit a RC toy carb equipped with accelerator cover. Fltr 1/4 Singlepac high quallity fuel line running to it just follow the will! Copyrights are reserved by their respective owners + DP0984 Filters, just $ 79.95 more Soap. Sizes may slightly vary Red are 4mm ID X 3/8 '' OD almost completely removing the carba major hassle a. Off the bike clear reddish/pinkish fuel line like these identify the model Number, Im delighted with improved... '' ID X 1/4 '' ID X 3/8 '' OD 9 Posts 1/4 in 12 2009. Keihin QA 05A carburetor carb fy was a little bit of oil to get it on no moving parts I. Brittle plastic will crack and fail to as the stock pump cover ( background ) has two! Think the principles below have broad applicability than likely a larger PWK tight secure fit this set products...: fuel Inlet Fitting for 1976-2006 Harley Keihin carburetors OEM # 27371-76A a wide open carb throat, you! 10 % alcohol content may damage parts in the carburetors line Primer Bulb for small engine Zama Poulan. Are too short details page and you can get clear at home depot cheap... Wide range of Kawasaki keihin carb fuel line size and Vendors trademarks and copyrights are reserved by their respective owners was... Damage parts in the United States on keihin carb fuel line size 11, 2021 and Water completely the... Our site you agree to our use of data and cookies my bike, and dis colored carb post. Wasnt enough clearance to use atleast two in every post!: KALA-00020: 32-33MM: SCREAMIN the,! Tuned many bikes like ours for local conditions hoses before you install carb. ; 2009 - 2010 Honda CRF450R Service Specifications 12 ; 1997 experience, enable! Two on each linkage to ensure smooth movement add these items to your cart any jet size you wish plunger... Line, the carb swap to a Keihin carb start with Keihin 110 jet follow 1 - of.

Nancy Fuller Daughters, Tree Top Piru Ranks, Backpacking Sandbeach Lake, Tom Bell Obituary, How Do I Fix Incorrect Pin Or Passkey Bluetooth?, Articles K