Before this everything was tip-top! When i went to put it back together I found a spring left over that I have no idea where it goes. Otherwise, stay with the stock size. 2410 S. Sequoia Drive Compton, CA 90220 Sportster Unlimited I hope this helps you narrow down the source of the problem and find the correct solution. Estimate 1/4 Mile Time Motorcycle Parts site. Twist the throttle grip and the slide is raised in the venturi. Jul 23, 2010. ________________________________________________________________________________ EVO 95 HP Stage 3 Edith Carli is a passionate and knowledgeable article author with over 10 years of experience. https://www.harborfreight.com/19-oz-crc-brakleen-brake-parts-cleaner-62229.html April 4, 2022. The fuel naturally tries to fill in thelow pressure of the venturi's depression by injecting itself through one,or a combination of the three fuel jets. Visit our Disclaimer and Terms of Use page for more information. The tube can be cleaned and reinserted into the carb. Gently turn the pilot mixture clockwise until it's seated. H-D has used Keihin butterfly and CV type carburetors carb synch screw. $75.94. Up and Down arrows will open main level menus and toggle through sub tier links. Would love to get it properly sorted. Jetting Assistance sudco@sudco.com Open the drain bolt to empty the float bowl. Now it can't get the mixture it's trying to suck in because the butterfly valve is closed, blocking the air flow. im looking to do some upgrades but i have no idea what to get. I have learned that the Hinckley Triumphs fuel system impacts the exhaust and air filters. There are also smaller sizes, such as the 20mm and 22mm, as well as larger sizes, such as the 32mm and 34mm. Second, see if the carb has a removable bowl so that the floats can be adjusted. KEIHIN, Hi all, I have a 1998 TBS. Those parts on a Keihin CVK need to be very clean and fresh. Selecting a cam At full throttle there is a huge difference. Install Sportster cams YOST EZ-CHANGE FLOAT BOWL SCREWS FOR KEIHIN CV & MIKUNI HSR. The manual shows the KLR600 needle has these grooves, but the KLR650 comes many thanks cameron. One way to tell if a carb is a Keihin is by the model number. Too rich and you're wasting fuel, spewing more pollutants, diluting your oil, fouling engine parts, and performance suffers. engines, HD 2007/08 You can certainly start with the bowl gaskets if you want to just eliminate the most simple possibilities, but I would just go all the way, personally. FREE delivery Fri, Jun 2 . Evolution 80 In this diagram I am showing a size 42 pilot jet. The jets are under the float bowl cover. tire tube patch! Im trying to identify a keihin cvk carb. Fuels that contain over 10% alcohol content may damage parts in the carburetors. The higher the needle goes, the progressively thinner cross section of the needle allows more fuel to pass through the needle jet. Thanks, Jim. If you have gas in your airbox, I suggest that you should just remove, disassemble, clean, and rebuild your Keihin CVK carbs. Spark Plugs 2- I already replaced stock air filter by screamin eagle stage 1 XL high flow K&N(PN#29400026) & also replaced the stock exhaust by V-twin one (Radi-Dual 1-3/4 J&P PN#: 441-145 ). Tuned it out to just a sweet growl when you get out of it. Mick, thanks for sharing your experience. www.trivoo.net EVO 74 HP Stage 2 The morte the engine breathes, the more youll need to adjust the needles and jets. These are much more rugged than the stock screws and allow for multiple on-off cycles without stripping. Please contact us with any questions document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); 2014 TriumphBonneville.org | All Rights Reserved | Not affiliated with Triumph Motorcycles UK, Triumph America or any Triumph Motorcycle Dealer. 883 to 1200 Upgrade As you advance the throttle cable that's connected to the butterfly valve, the butterfly opens to allow more air through the venturi. Any help is appreciated. Nightrider COPYRIGHT thanks for your swift response. After disconnecting the gas and draining the fuel out, you'll need to rotate the carb and take the four screws off the bottom of the float bowl and remove it. Some products are not legal for sale Here are some tips to help you identify your Keihin carb: Shortcuts What are the identifying marks on a Keihin carb? Unless it's time to clean or overhaul it, you've changed the exhaust or airfilter, you need to troubleshoot it,or the Kid in you just has to know, "how does it go?" Site Map Jake warned of little parts that can easily be lost. WEB Links You are welcome! Contact Bill Gately at Bonneville Performance to get yourself a nice Mikuni 42mm carb conversion kit and lots of support. Don't forcethe diaphragm valve and needle down into the carb body whenreinstalling it. When the vacuum in the top chamber rises sufficiently, the constant ambient pressure of the lower chamber, helps the diaphragm valve overcome the downward force of the diaphragm spring, and it rises from the venturi. ________________________________________________________________________________ but didn't take the carb or engine apart. The next two numbers following the KE denote the year the carb was made. elbow breaks easily, can be affected by today's fuels and has a restrictive flow rate. I never did dyno the bike with the stock carbs. Install a Big Twin cam We also remove the stock air filter and replace with a K&N filter it lasts a lifetime and makes the engine breath properly. To avoid injury, carburetors should be installed when the engine is cold. made from brass and flows 40% more fuel. I bought it with Norman & Hyde exhaust and installed a free flow k&n filters. One of the most distinguishing features of a Keihin carburetor is its tapered needle valve. When it warms up then it improves a bit up til 3000 rpm then over 4000 rpm it runs fine with lots of grunt. Went up to 3 turns with out much change. _________________________________________________________________________________, Back to Top Back to Top At idle it's around 11 times a second. Specified float height on the Keihin CVK32 is 17 mm, about 43/64ths of. Hopefully you'll see 0.5mm above the base of the carb body, +/-1mm, (only about .08" variance).If it needs to be adjusted, and the carb is already off the bike, the method in the factory manual is the easiest way to set the float height. Thanks, Ill get my local guy who does my MOT to have a look. The needle should easily drop into the needle jet. I discovered that the flexible plastic(?) The fuel in the float bowl is also 'vented' to thelow pressure of the venturi through the starter, pilot and main fuel jets. If you misplace the idle mixture its off of a 2003 prairie 360. it says G686 APKM. To overcome this, give a stronger fuel mix ratio 1/8 of a turn is enough. Im not ready to go buy new carbs yet though! Sportster Finding Manifold Leaks The last factor in the main system is the Main Jet. Mike. Keihin carburetors are built in a variety of sizes, each with different model numbers. If you need replacement parts you'd be well advised to get them from your local Harley Davidson outlet. Hi there Randy, I see youve done some more dialing in on the carburetors on your bike?Wondering how you find the results? Although the idle mixture screws I have can be adjusted when the carbs are fully mounted, I prefer to adjust them at this point using needle nose pliers with some tape to protect the brass. Seen some in Amazon , what exactly do I need, what they call Idle Mixture Screw ? One fixed a torn diaphragm valve with a Bike runs perfect, just an annoying gas drip if I dont shut off the petcock. One minute it starts, idles and runs perfectly. Also my battery cover is lost/misplaced. Too lean and you run the risk of detonation, engine operating at higher temperatures, and performance suffers. Sign up for Monthly News Letters The most common sizes are the 24mm and 28mm carburetors. Randal: Enjoyed your post. This is great for tarmac cruising and feeling warm and fuzzy about doing your part to reduce global warming while pocketing some spare change. Sign up for Monthly News Letters Other identifying marks include the model number (usually stamped into the metal on the side of the carburetor as well), the part number (usually found on a sticker on the side of the carburetor), and the serial number (usually found on a sticker on the side of the carburetor or on the bottom of the carburetor). It will not work. Any action you take based on the information found on cgaa.org is strictly at your discretion. Unfortunately, I dont have any experience with Bonnevilles before the Hinckleys starting in 2001. This may prevent the carburetor from functioning properly. It sounds serious though as I have never seen a glowing red pipe on any Triumph even racing bikes. The airscrew works with the pilot/slow speed system of the carburetor, mainly affecting the engines initial starting, idling and initial power delivery. Just wondered if you could shed any light on my problem? Every drop of gas needs to be emptied from the carbs if they are not being used regularly. It is located under the rear of the vehicle adjacent to the . This results in a carburetor that is more efficient and easier to tune. This will pull up a list of carburetor models on the left side of the screen. _________________________________________________________________________________ But 90+ bhp sounds pretty nice with the big bore. Mikuni Manual The needle jet collar and the pilot screw O-ring both tend to stick in place. Any suggestions ? Remove the fuel filter. This creates a void that sucks in whatever is on the other side of the open engine intake valves. Read more. The main body of the carburetor is made up of two halves that are bolted together. Going to use this guide for changing the jets on mine too. on their side like you did without having to remove the gad tank? Removed carbs cleaned bowls, checked needle and seats, float level looks good but no idea what the spec should be. Has a serial number i'm guessing, that states V357 CE27.. cb4 003 (Small).jpg (44.67 kB, 640x480 - viewed 311 times.) All Harley EVO engines through '84-'99 used the same carburetor. I plan to use the performance jets that came with the kit. i modified the air box by taking about 10mm from the topside of the guide for the frame bolt to slide into, at the rear of the box.there is a moulding that helps with the size. So I thought I would try your set up with 42 pilots. Perhaps the most obvious is the Keihin logo, which is usually stamped into the metal on the side of the carburetor. Keihin carbs are made using a process called investment casting, which allows for more precise tolerances and a smoother finish.