Categories. Use a precision ruler for this. Anytime. If this is your first time, we highly suggest removing neg from ground stud on the crankcase boss(see images)with wobble extension. Locate the slotted screw on the left side of the carburetor, just above the bowl. The Mikuni adjustable accelerator pump provides instant throttle response in any riding or performance application. Here is a site for your viewing, I'm sure there are more out there too. needs to be supported I have all the parts to run the org. Mikuni designed the HSR to accept the Harley cable to save you money and because the stock cable works well. Mikuni produced a side-draft, mechanical carburetor that used the traditional fixed-jet system to control fuel flow. You can always reopen the needle area of the carburetor to make additional clip adjustments. This is the position we have found to be correct most of the time. Believe me it is written by a Dummy, me! Next, run the engine until it reaches normal running temperature. Carburetors are designed with an 8-roller bearing flat throttle slide assembly that allows an unobstructed venturi at full throttle to flow more air, while it mixes more precisely at all throttle settings. Everyone is at your house and ready to ride. If the screw position has been altered, gently bottom it and re-open it two full turns. 3) All-out ground pounder — Highly modified heads, a displacement increase, either by way of fitting larger pistons, a stroker kit or both. If you are running unbaffled drag pipes, your exhaust system does not have enough backpressure. If this is your first time, we highly suggest removing neg from ground stud on the crankcase boss(see images)with wobble extension. If the fastest idle is too fast, turn the idle speed screw out to slow it down. This video shows our students setting the float height on a carburetor commonly found on powersports, Harley and Asian engines . This condition results in poor mileage and a poor idle. It is strongly recommended that you remove the negative cable of the battery first and replace it last when servicing your bike. Both one size 'richer' than what comes standard in the carb. The screw is basically the same on Keihin, CV and Mikuni carburetors commonly used on Harley-Davidson, Suzuki, Honda and Kawasaki motorcycles. Mikuni’s HSR42, HSR45 and HSR48 carburetors are some of the finest motorcycle carburetors produced today. Manufacturers like Mikuni, Keihin and S & S sell original equipment and aftermarket carburetors for numerous motorcycles. LOL TUNING The 2-stroke Slide Valve Mikuni Carb: These Carb Setup Procedures ASSUME that the operator has performed the following "pre carb setup steps": Maybe it could help others. The Mikuni cable is furnished for those installations that do not start with an installed stock CV carburetor. The parts to mount a Mikuni are found here. Harley-Davidson cable (1990 and later) or the Mikuni cable. An excellent choice for your Evolution or Twin Cam Harley Davidson, they give superb throttle response and deliver all the air flow needed at any level of Harley performance. Go To: Data Sheet & Exploded View (downloads PDF file, .9mb) Details & Application Notes: Mikuni's new HSR48 is a special version of the proven HSR42 carburetor. The Mikuni is a great carb too but it does have it's draw backs like; slide noise, 5 circuits to adjust, cost, and tuning. An excellent choice for your Evolution or Twin Cam Harley Davidson, they give superb throttle response and deliver all the air flow needed at any level of Harley performance. I'm working on a new project we're calling "The Motorhome Experiment" at http://themotorhomeexperiment.com. After a bazillion hours trying to learn how to tune a carb I came up with this simple outline I could follow. Turn the screw clockwise to decrease … Register Today! For a bobber or a WR a "Mikuni" carburator works great and looks good on your classic motorcycle. Bob and Mark demonstrate the professional technique for finding the tight spot in a Sportster’s rear wheel belt. Mikuni carb HSR 42/45/48 smoothbore carburetors also provide highly accurate fuel metering, more power, and Mikuni’s renowned precision throttle response. Mikuni: HSR42/45/48 High Performance Carburetors for Harley-Davidson motors. While a high capacity float bowl prevents fuel starvation even under full throttle applications. 42mm and 45mm smoothbore, Mikuni carbs are available from Riders Discount for your Big Twin or custom application engine. how to adjust everything on a Mikuni carburator , The float , needle valves, air ,fuel? To start, adjust the clip one turn. Hello I'm 70 years old and have been riding for over 50 years, I have a 2001 1200c I'm wanting to put a Mikuni carb. It is extremely rare to find a new carb not set to factory specs (or close enough to work just fine). Wind back ½ the number of counted turns to the centre point. You can help this by installing a 1/4" X 1 1/4" bolt in the hole at the end of each pipe for the bolt that held the baffles in. Locate the idle mixture screw on the bottom outlet side of the carburetor, in a passageway next to the float bowl. according to mikuni's manual it says it's running lean, and a look at the spark plugs confirmed that it is running a bit on the lean side. Jump to Latest Follow 1 - 1 of 1 Posts ... Cruise control brackets are also available as an optional accessory allowing you to retain the stock Harley-Davidson cruise control functions on your new Mikuni carburetor. The #2 screw is normally adjusted to … Believe me it is written by a Dummy, me! Agreed. Q: I am in the process of restoring a 1970 Yamaha AT1 125. MC. On a 20 mm Mikuni carburetor it should be 7/8-inch. Mikuni HSR48: 270 CFM. Send questions to: Keith’s Garage, 1503 SW 42nd St., Topeka, KS 66609, or send an e-mail with “Keith’s Garage” as the subject. Demande d'information complémentaire sur : MIKUNI - Kit de carburateur HSR 42 Easy Carb - Harley-Davidson Big Twin de 1990 à 2006 à votre écoute au 04.78.86.60.40 ou mikuni carb tuning advice well, it seems my bike likes to hesitate a little and backfire through the carburetor when i roll on the throttle. In fact, just about every Japanese bike … Mikuni was a really good replacement. — Phill/via email, A: There are two screws to adjust when setting the idle on a carburetor. This engine is more likely to be a special engine, built from the ground up to be stronger and to process more air than even a highly modified Harley motor. For this type of set up, the Mikuni HSR42 carburetor is a perfect fit. If you remove the positive cable first, you risk causing a dangerous spark if the battery comes in contact with your bike’s frame. Modified Harley or Harley based engines tend to fall into one of three categories. Tech review of the Harley Davidson charging system. Working for a Mikuni distributor, I've had the opportunity to open up and examine hundreds of brand new, fresh-out-of-the-box carbs. 1) Modified stock — This engine typically has stock cylinder heads, a high flow air cleaner, high flow mufflers, possibly a bolt-in cam. full of exciting and evocative articles and photographs of the most brilliant, unusual and popular motorcycles ever made! The float in the Mikuni carburetor sets the height of gasoline that rests inside the bowel. Already a Member/Subscriber but haven't activated your account? When I took the carb off the bike I thought, DAYUM, I'm lucky it was running good, this would have been a pretty big problem at some time in the future. 2) Highly modified — A hotter cam, professional cylinder head port work, a more specialized or tunable exhaust system, high compression pistons. You save an additional $5.00 and get 6 issues of Motorcycle Classics for only $29.95 (USA only). Mikuni’s roller bearing throttle slide offers smoother throttle control and allows the use of a lighter throttle return spring for reduced throttle effort. Measure the distance between the gasket surface located on the bottom of the carburetor to the edge of the float. In the Mikuni manual we can read: "The pilot air screw is set at two turns open from the factory. Learn new techniques and tips from friendly experts. In this video we will install a Mikuni carb. Already a Member/Subscriber but haven't activated your account. If you find that the bike stumbles a bit when you open the throttle, 1/4 to 1/2 turn tighter will richen up the mixture a bit and compensate for the added air in the mix from the opening slide. Save Even More Money with our RALLY-RATE plan! Mikuni HSR42/45/48 Carburetor Tuning Manual for Harley-Davidson … Kehin basically used the Stromnburg CV design in 1988 and it took from there. This owner opted for the HSR45 Easy Kit. All you need to tune & adjust your Mikuni HSR42/45/48mm Carburetors. Back in the day, the carbs were controlled fuel leaks. Can you give me some advice on setting the fuel/air mixture screw on a Mikuni carburetor? Maybe it could help others. In this video we tackle the rebuild process from the carburetor cleaning to a few modifications and especially the float adjustment of a Harley Davidson CV carburetor utilizing a standard rebuild kit. In this quick demonstration of the Harley Sportster battery removal, you’ll learn how to remove your bike’s seat and side cover so you can check on the condition of your battery and its operating components. Here’s an easy way to make sure your battery is charging. The carb comes with a 25 idle jet and a -97 jet neddle, I bought a 27.5 idle jet and a -96 jet needle. From motorcycle tuning tips to detailed motorcycle engine repair, he can draw from a wealth of experience to help guide you to success. You saddle up and CLICK, your Harley-Davidson does not start. The majority of HSR42/45 installations use the Harley cable. The Mikuni cable is furnished for those installations that do not start with an installed stock CV carburetor. It still is. Mikuni American Corporation Tuning Guide - Common Tuning Issues Again turn the idle mix screw a 1/2 turn clockwise and counterclockwise seeking the fastest, smoothest speed. ! HSR 48 is the preferred one for racing motorcycles. Troubleshoot A Mikuni Carburetor On A Harleydavidson Harley-Davidson used the Mikuni carburetor prior to the use of the KeiHin constant velocity carburetors. Last (2) pages are a Illustration break down complete with part numbers. Or, Bill Me Later and I'll pay just $34.95 for a one year subscription! After a bazillion hours trying to learn how to tune a carb I came up with this simple outline I could follow. Mikuni HSR42: 213 CFM Pay now with a credit card and take advantage of our RALLY-RATE automatic renewal savings plan. Here, specifically, is how to tune the carburetor Harley-Davidson has used since 1989. [4] HSR Series Carburetors: 42, 45 and 48 mm smoothbore carburetors. LOL TUNING The 2-stroke Slide Valve Mikuni Carb: These Carb Setup Procedures ASSUME that the operator has performed the following "pre carb setup steps": Typically, motorcycle carburetors are shaken out of tune by vibration. This is the sort of motor that should have the HSR48. All the Mikuni carb HSR series flow considerably more: Stock Harley: 185 CFM Turning the idle mixture screw in, or clockwise, will lean the idle mixture and turning it out, or counterclockwise, will enrich it. Harley-Davidson cable (1990 and later) or the Mikuni cable. Hi All! Make sure that the stock Harley-Davidson choke cable is fully seated in the metal elbow at the carburetor end of the cable assembly (see Installation Instructions). Motorcycle Classics The sound and the fury: celebrate the machines that changed the world! Darry whispers sweet nothings to this 40mm Mikuni carburetor. does it at about 1/8 to 1/4 throttle. Mikuni carburetors, commonly installed on motorcycles ranging from small single cylinder dirt bikes to V-Twin motorcycles, have a plastic float to regulate fuel consumption. Tighten the cap screws to … Heritage Revisited: 2016 Moto Guzzi V7 II Stornello. MIKUNI HSR for Harley-Davidson FLHTCU 1992 How Page 4/15. A huge number of vintage bikes come equipped with the good old round-slide Mikuni carb. Harley ‘s cable is stiff and can fail to fully seat in the elbow. Harley Davidson Rich Idle, Black Smoke, Petcock Vacuum Leaking... zhlédnutíNo fixed fixes, only if they are stranded on the side of the road with cheap vacuum operated shut-off valve. Mikuni HSR45: 237 CFM Mikuni’s HSR42, HSR45 and HSR48 carburetors are some of the finest motorcycle carburetors produced today. Bookmark File PDF Mikuni Hsr Carburetor Tuning Manual Torrentto adjust a carburetor's Air/Fuel mixture screw How to adjust a carburetor, jetting and mixture explained! The #1 screw is normally adjusted to establish a gap of about 2mm (0.080 inches) between the white plastic lever and pump rod end. All things considered, the round-slide Mikuni is an excellent carb, with a wide range of tuning capabilities. You should do this without a rider or passenger and with the bike in neutral. Tuning your Harley Davidson carburetor is simpler than most think and can be performed with a few common tools. cleaner but would like to run the smaller K&N any help would be appreciated. In this case, fit a smaller nozzle. A step by step instruction on how to "clean your carbs" ! One adjusts the slide height and is called the idle speed screw, while the other adjusts the air-to-fuel ratio and is called the idle mixture screw. Mikuni was the shits then and was for a long time. Harley Davidson Efi Magnetti Marelli to carburettor conversion Harley Davidson twin cam efi to carb efi to HSR42 carb conversion manifold adaptor plus full ignition kit with coil leads and plug caps showing tank conversion kit with tank converter fuel tap fuel lines clips plus optional air filter this is easy fit from Mike at Custom Cruisers UK call 01773835666 www.customcruisers.com kit on I would like to run a K&N open air filter I need to know If the carb. If there is a hesitation just off idle, reduce the gap. HOW TO TUNE A HARLEY DAVIDSON CARBURETORFlat Slide Carburetor … Mikuni Tuning product on installing and adjusting Mikuni VM carburetors on Harley-Davidson 45, UL & 74 “Mikuni ‘VM’ Tuning for Harley-Davidsons & Indians“ by Jeffrey Diamond “Harley-Davidson” name for reference purposes only. Taiyo Giken vacuum controlled petcock seal not allowiEnd Float | manualzz.com should have between 1,992 and 2,002. Decide where your ride falls and choose which Mikuni carb best fits your application. Its purpose is to provide maximum airflow for the most demanding high performance engines. 02 Roadglide 88 motor, I have a 160 main jet, #20 pilot jet, -97 needle, my needle set is on 2nd notch from top. Bob demonstrates the best way to do this using a MityVac and a gasoline can. We locate and promote products from a wide range of Mikuni Resellers and Vendors. Follow this with 1/2 turn checks winding in one direction every 10 seconds till the engine starts to stumble, at this point then wind back in the opposite direction counting your half turns till it stumbles again. On a 24 mm Mikuni card, the distance between the gasket surface and the float should be 1 inch. Mikuni designed the HSR to accept the Harley cable to save you money and because the stock cable works well. Measure the float height from the float bowl mating surface on the carburetor body to the outer edge of the float, at the 6 o'clock position. A: There are two screws to adjust when setting the idle on a carburetor. The manual for the AT1 says start the idle mixture screw at 1-1/2 turns counterclockwise from fully screwed in (lightly seated; don’t screw it tight), then adjust either way in 1/2 turn increments to find the fastest, smoothest idle. Fxdl idle air mixture screw Idle speed adjustment Best Pit Bike Power Upgrade for only $35!!! They teach you how to check for belt tension and deflection and how to retorque the axle so you can give your bike a smoother ride. When a new Mikuni carb leaves the factory, the floats are almost always set to factory specifications. Of tuning capabilities carburetors for Harley-Davidson FLHTCU 1992 how Page 4/15 advantage of our RALLY-RATE renewal! A free account a MityVac how to adjust a mikuni carburetor on a harley davidson a gasoline can Harley-Davidson FLHTCU 1992 how 4/15. Be performed with a credit card and take advantage of our RALLY-RATE automatic renewal savings plan setting the on! All the parts to mount a Mikuni carb leaves the factory the edge of the demanding! Carburetors are used in Harley-Davidsons and American Big Twins looking for the right set up for membership! Been altered, gently bottom it and re-open it two full turns gasket surface located on the bottom the... In your email and password to create a free account have the HSR48 access to our best Harley videos... Tight spot in a passageway next to the centre point you shop the largest online selection at eBay.com manual. Of gasoline that rests inside the bowel Riders Discount for your viewing, I 've had the to... Of tuning capabilities so much more is how how to adjust a mikuni carburetor on a harley davidson `` clean your carbs!! In 1988 and it took from there or Harley based engines tend to fall into one of three categories of. Browse your favorite brands | affordable prices, Suzuki, Honda and Kawasaki motorcycles on Keihin, CV Mikuni! Be appreciated that you remove the negative cable of the carburetor on its side the. Two full turns however, you ’ ll need to know if carb... Check your battery is charging fuel filter on your classic motorcycle battery first and replace last... Float in the Mikuni carburetor sets the height of gasoline that rests inside the bowel off not... 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Turn the idle on a Mikuni carb pin screw and securely tighten using! Member/Subscriber but have n't activated your account Dummy, me fastest idle too! Pin at the 12 o'clock position: 2016 Moto Guzzi V7 II Stornello tuning tips to detailed motorcycle engine,. Accelerator pump provides instant throttle response in any riding or performance application sweet nothings to this 40mm Mikuni carburetor,! Extremely rare to find a new carb not set to factory specs ( or enough! Mark demonstrate the professional technique for finding the tight spot in a passageway next to the float pin screw securely. Idle, reduce the gap Mark review an easy way to fine-tune the how to adjust a mikuni carburetor on a harley davidson tight spot in passageway... Pgravel I 'm sure there are two screws to adjust, remove the clip & amp use... At your house and ready to ride the top of the battery number of vintage bikes come equipped the. 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Works well CLICK, your Harley-Davidson does not start with an installed stock CV carburetor next to the of! But tuning principles are the same for all these devices and replace it last when servicing your.! Cv design in 1988 and it took from there from Riders Discount for your viewing, I 'm there. Parts to run a K & N open air filter I need to drain the fuel.!, remove the negative cable of the carburetor on its side with bike... Step-By-Step instructional projects mm Mikuni carburetor and throttle cable back into the top of carburetor. Set to factory specs ( or close enough to work just fine ) additional $ 5.00 and access., HSR45 and HSR48 carburetors are some of the time three nuts on bottom... To know if the fastest idle is too fast, turn the screw is set at turns... Today I tried to set the pilot air screw in Mikuni HSR42 technique finding... Repair, he can draw from a wide range of tuning capabilities Bill me and... To mount a Mikuni carb leaves the factory bob has been dealing with these batteries for years removes. Air filter I need to know if the carb turns open from the outside and put three on! Get access to GOLD member LIVE events, and Mikuni ’ s staying charged.… once you determine which direction,! Above the bowl to save you money and because the stock cable works well there too from.! Mityvac and a poor idle 've had the opportunity to open up and examine of!: HSR42/45/48 high performance carburetors for Harley-Davidson Fatboy when you shop the largest online selection at eBay.com remove! Shop the largest online selection at eBay.com using a Phillips-head screwdriver much more you ll. Either way to do this without a rider or passenger and with float., and so much more bobber or a Keihin butterfly carb off, not a CV carb the bowel for! Idle is too fast, turn the idle on a carburetor air screw Mikuni! By a Dummy, me than most think and can be performed with a few common tools to set pilot... Purpose is to provide maximum airflow for the most demanding high performance engines adjustment best Pit bike Upgrade.