Congratulations on your purchase of the merge aps accelerator pump spring these instructions are intended to provide the competent mechanic with the information necessary to correctly install and adjust this merge product. Sudco carries the widest selection of performance carburetors and parts from mikuni and keihin. Owning one of these speedy vehicles may require some fuel system work from time to time. With this knowledge you should be able to tune the keihin carburetor correctly and tackle common adjustment issues. Established in 1956, keihin is a specialty and aftermarket auto product producer. Buy kiwav jet wrench 4 in 1 tool for keihin carburetor inner parts quick adjustment. Keihin carburetor for honda crf150f crf150 pit dirt bike ebay. Special applications keihin carbs home for your fcr pwk pwm. The stock cv carburetor has a venturi diameter of 40mm 1. Many thanks to marc salvisberg, founder of factory pro tuning, for teaching me the finer points of using dynamometers and tuning carburetor equipped engines. The airscrew is a finetuning adjustment designed to allow the carburetor to be slightly adjusted for variances in atmospheric conditions.
These files contain more helpful tuning techniques. Harley was a famous company, so when i heard we could design the carburetor, i was really fired up, reminisces one person involved at the time. The site navigation utilizes arrow, enter, escape, and space bar key commands. Place the carburetor gaskets between carburetor and inlet pipe, and tighten them to the specified torque with two m6x25 socket cap screws and two lock nuts. Full rebuilds, carburetor respacin and custom made throttle shafts it can all be done here.
The airscrew works with the pilotslow speed system of the carburetor. Trouble shooting your carburetor your keihinmikuni jets. They have a vacuum operated slide that changes the diameter of the main opening, called a venturi, in the side of the device. This may prevent the carburetor from functioning properly. The cvk carburetor is produced by japanese manufacturer keihin whose name is derived from the second character of the word tokyo for several motorcycle brands, including kawasaki. Do the installation work correctly referring to hondas genuine service manual for the abovementioned applicable models. The airscrew is a fine tuning adjustment designed to allow the carburetor to be slightly adjusted for variances in atmospheric conditions. Following in their tradition of high technology and performance, keihin s latest carburetor design for racing is the fcr.
Not only do they handle carburetor itself but also various kinds of repair parts. Im sure he still disagrees with some of whats here my dislike of changing float level, and even suggesting that one use a lambda sensor, for examples. This is the base guideline about tuning your keihin. Open the dump screw several turns you want to open the hole large enough for passing pieces of trash. Run the supplied throttle cable up to the carburetor without stretching it too tight.
With a phillipshead screwdriver, open the dump screw on the right side of the float bowl, draining the carburetor. Orings gaskets jets jet needles spigots adapters stacks other keihin pwk pj pwm pe parts. Keihin carburetors are designed to be used with normal pump gasoline. Get the best deals on keihin motorcycle carburetors when you shop the largest. Hey folks, ive a 1972 honda cl350 with some apparent carburetor issues. To ensure you receive the correct parts needed for this repair job, it is important to identify your vehicles carburetor. Fuels that contain over 10% alcohol content may damage parts in the carburetors. Enter and space open menus and escape closes them as well. Rebuild kits general honda kawasaki suzuki yamaha orings gaskets jets jet needles choke.
That was not the only thing to get fired up about, of course. Up and down arrows will open main level menus and toggle through sub tier links. This site is not owned or operated by keihin automotive, all products listed on this site are made available through multiple online keihin carburetor parts supplier websites. Constant velocity carburetors were invented by english motorcycle racers, but they are now called keihin carbs after the japanese. If it is defective, the bowl will either over flow or not allow enough fuel into the bowl. In your detective work of finding your carburetors problem, consider the needle valve as your starting point. However these might be for specific carburetors we highly suggest you read them regardless of make or model of carburetor. Shiny red tuning is a 2stroke scooter tuner and gilera runner specialist with inhouse dyno facilities and a fully equipped machine workshop. Details about keihin carburetor for honda crf150f crf150 pit dirt bike. In 1982 keihin expanded to north america with plants all over the continent. Jetting your slide valve carburetor pdf jetting your cdkii diaphragm carburetor pdf jet list pdf slide chart pdf. We recommend that if you are a novice, you consult a professional mechanic or technician for your specific needs. Flat valve, air brake, acceleration pump, is just the carburator.
Keihin s engineers were exhilarated to get this offer at a time like this. Dont do it yourself if you dont feel confident but let it to a professional mechanic. I have gone through the standard procedure of tuning them warm the engine, adjust the idle to 1100rpm, turn the mixture screws on each until engine idles at its maximum, equalize exhaust. This needle valve meters your fuel entering the carburetor bowl.
Keihin also distributes products to such companies as harley davidson and kawasaki. It produces carburetors and fuel injection, and is a major supplier to honda. Buy products related to keihin carburetor parts and see what customers say about keihin carburetor parts on free delivery possible on eligible purchases. Sudco has you covered from motocross to drag racing and everything in between. If your engine does not start or idle properly now, you should attempt determine the cause and repair it prior to making these carburetor modifications. Hello group, the keihin constant velocity carburetor on your honda ch250 should perform well with the standard recommended settings under average load, climatic, and barometric conditions. Unfollow keihin carburetors to stop getting updates on your ebay feed. This is the recommended carburetor size for a 4cylinder engine that is tuned for road race use. Rebuild kits general honda kawasaki suzuki yamaha o. We are flattered that you have purchased one of takegawas products.
The airscrew works with the pilotslow speed system of the carburetor, mainly affecting the engines initial starting, idling and initial power delivery. Note that hildo can not be held responsible for the contents of the tuning guide below. Basics of carburetor operation the basic secret of carb function is that inside each carb are thousands of tiny gnomes. Do not underestimate the ability of the stock keihin cv carburetor to produce good horsepower. Unfollow keihin carburetor parts to stop getting updates on your ebay feed. Doesnt matter if one, two of four cylinders, fcr application chart has an answer for everyone. Notice that audi 80 model does not have f, g nor e on right on picture vacuum ports. Stock engines should use the next smaller size and engines tuned to maximum output, may use one size larger. Certain parameters may vary due to air pressure and temperature, altitude, umidity.
It covers all the important topics in tuning your fcr racing carbs. Be carefoul when jetting, a bad jetting can produce huge engine failures. Black tube that goes from the top, leaving a loop, is not a hose, but sable supplying power to the electric valve overrun 15. Carburetor tuning guide quick jetting guide for mikuni and keihin cv carburetors with movable jet needles the following tips and insights are for your information only. The keihin corporation, kabushikigaisha keihin was founded december 19, 1956, and maintains its head office in shinjuku ward, tokyo, japan. Left and right arrows move across top level links and expand close menus in sub levels. If you are not experienced in carburetor tuning, we do suggest that you purchase and read our sudco mikuni tuning manual to give you a much better understanding of how the motorcycle carburtetor operates, and how it and the engine are diagnosed, the carburetor disassembled, adjusted and tuned for the correct jetting and running. Keihin carburetor for honda trx250tm fourtrax recon 250 atv 20022007. Although it was primarily designed for low production cost, the cvk has a track history of good performance, easy maintenance and simple tuning.
The jets are the factory ones, so this doesnt have to do with jet size. All constant velocity cv carburetors are designed to compensate for changes in altitude and barometric pressure. Whether you need to purchase just 1 item or, walker has all of your individual carburetor component needs covered. Their packaging is very professional item is very safe it comes with a box inside the box with bubble wrapped this carburator is a work of art from keihin japan. The air screw is a small 5mm in diameter slotted brass adjustment screw located on the inlet side air filter side of the carburetor. Keihin is a company well known worldwide that specializes in manufacturing fcrcr carburetors.
956 898 815 428 351 930 1496 1337 1064 1245 859 1468 1090 989 91 211 76 240 793 834 929 253 717 988 1448 262 1550 995 1023 777 1196 1567 1534 510 1558 506 696 781 251 1376 1198 949 1016 676