Mikuni carburetor identification numbers chart. html>dd

To find the parts that we have available for the carburetter, simply omit the suffix (in this case the F of Front) and look Genuine Mikuni Needles. com ZAMA. This style of jet has its fuel flow calibrated in the “wrong” direction i. BSR33-73 Mikuni Carb- OEM Yamaha Kodiak 400 5TE-E4101-01-00 | Mikunioz. Mikuni Corporation continues to operate its import and export ventures. The Kit includes new Gaskets, Seals, Diaphragm, Spring and case screws to return the stock fuel pump to like-new operation. 106 3 Feb 24, 2010 · If it is a new Mikuni, the original jetting should be a bit rich for a typical build and that's a whole lot safer than too lean. 0008" (I'll let those so inclined do the math to determine the flow difference) . (You can use White-Out) 9) Now you can set the 5/8 slide position ideal graph value according to your own evaluation of mid throttle jetting. Most motorcycle carburetor circuits are governed by . The KIT 007-731 contains: 002-061 rubber cap. Carburetor Division 8910 Mikuni Ave. #50 accelerator pump nozzle for either carb. www. 2) & List No. Most of the internals will be marked as to what size they are and a lot of them can be ordered separately as needed. Needle Valve Leak Test. MD060940. LA/LB. Mikuni 40 PHH Performance Carburetor – 6 cyl Jetting Kit #Z70/162. 24mm Molkt 97CFM. or from $10/week with. A short explanation to go with this particular tag: This tag reads "AUD325F". 3) 5J9-3 - last number is the clip position where 1 is at the top of the needle (leanest) and 5 is at the bottom (richest) Throttle valve (slide) 2. " The next two numbers following the KE denote the year the carb was made. Northridge, CA. This kit comes complete with everything needed to change your Norton from a dual carb to a single carb Mikuni, minus the throttle cable. le equivalent in the left hand column. 1965 to 1967 Quadrajets had a round 'bottle cap' tag on the front driver's side. 5: Air Jet: 1. The 34 qnd 40 refer to the diameter of the outlet to the engine. This is usually stamped on the side of the carburetor body or can be found on a metal tag attached to the carburetor. If there is a hesitation just off idle, reduce the gap. The carburetor number would be stamped on this tag and looks like xxxS. Mikuni Carburetor Jetting Box – 18 Adjustable Slots – 7x4x1. Identification. Bruce! Probably a Mikuni BST 34. Mikuni's VM Series, round slide carburetors have proven themselves as the performance standard for use on single and multi-cylinder, motorcycle and ATV vehicles. Mikuni Carburetor Product Catalog #23. Mikuni 44 PHH Performance Carburetor – 6 cyl Jetting Kit #Z70/164 – More Info. 00-59. 2003 Limited Edition Raptor. First identify the carb manufacturer, mikuni, keihin, hitachi, holley. intake bells. Carburetor Division. The jets are under the float bowl cover. ) The suffix will show what the carburetor was made for such as for a blower application etc. Apr 12, 2017 · I read on KTMTalk, CafeHusky, Sudco, CarbPartsWarehouse, and other places and found some good information. The ID mark will be either four or five numbers or numbers and letters. 91364 USA. html; 0001: 0002: 0003: 0004: 0005: 0006: 0007: 0008: 0009: 0010: 0011: 0012: 0013: 0014: 0015: 0016: 0017: 0018: 0019: 0020: 0021: 0022: 0023: 0024: 0025 Mikuni American Corp. Numbers like 6-2124 are casting numbers and do not equate to a carburetor number. 00 AUD – $ 27. Mikuni Carburetor Product Catalog #23 Click on Cover Above or Here to Open Digital Online FlipBook Click on Page Numbers Below to View Catalog as Quick Load JPG ImagesMikuni Products Catalog JPG Pages: 2-3 4-5 6-7 8-9 10-11 12-13 14-15 16-17 18-19 20-21 22-23 24-25 26-27 28-29 30-31 32-33 34-35 36-37 38-39 40 All carburetors were manufactured with a tag under one of the float bowl screws, unfortunately this was the only identification on several Carter models and it's frequently missing. Carb identification of a mechanical carburetor is simple. A "kit" will generally only include the needle and seat and bowl gasket as the rest is specific to the machine. Choose length depending on chassis clearance and desired tuning characteristics. ***Kits include all necessary diaphragms, gaskets, and hardware required to disassemble and rebuild Mikuni BN34, BN38, BN44 and BN46 square pump and round pump watercraft carburetors. Below are 2 different carbs, one has parts circled in yellow and another carb has parts circled in orange. Keihn jets are numbered by jet id, and the difference between a 178 and a 180 is about . 00-49. Look for identifying features - the most obvious feature of all motorcycle carburetors is their size, which will usually be marked on the body of the carburetor. 5 needle. Example 3445S. Second the jets need to be located. Works on Keihin and Mikuni carburetor caps. com the official home of Mikuni American Aftermarket Carburetor Division with Product Catalog, Consumer and Media Information, Distributor Contacts and Mail Order Sales. For needle shims see fastener Dont see the needle you need below, check carb rebuild kits. Needle says 53-75 and is in the 3rd spot from top. This comes with all the fittings, gaskets, and extra jets for fine tuning Jun 17, 2008 · Many tuners recommend using a 2. Mikuni MK-BSR29-7 Carburetor Rebuild Kit for Suzuki 2004-2009 LT-Z 250 Quad Sport ATV. Thanks again for the input. 2. Part Number: Description Mikuni Carburetor Product Catalog #21 Click on Cover Above or Here to Open Digital Online FlipBook Click on Page Numbers Below to View Catalog as Quick Load JPG Images HOME 1 2-3 4-5 6-7 8-9 10-11 12-13 14-15 16-17 18-19 20-21 22-23 24-25 26-27 28-29 30-31 32-33 34-35 36-37 38-39 40 The first carb type is mechanical. Includes rubber cap, locknut, cable adjuster and 90º tube. The number stamped on the jet corresponds to the number of cubic centimetres of gasoline which will flow Aug 8, 2016 · 4807 posts · Joined 2006. For example, a carb with the code KE0103 would have been made on January 3rd. This adjuster has threads on one end, the other end swivels. 8910 Mikuni Ave. Year. 9. Mikuni Baseline Jetting Size Recommendation Chart – 40PHH / 44PHH Carburetors. Teikei. Below is a quick reference table to match your carburetor’s Manufacturing Model to the Service Number. VM SERIES Throttle valveS / SLIDES. 5mm cutaway: Pilot Jet 20. Once the number has been confirmed it can be looked up online or you can call and speak to a JEGS tech support specialist at 1-800-345-4545. As the throttle is opened, especially at low rpm, air velocity through the carburetor drops and the mixture naturally becomes leaner. S&S. Most 400's and 500's in those years used that carb. In turn a 5 could be 50. PHOTO 1. the book I have list all the '98-'99's with a 400 engine with a Mikuni VM34SS. FIG 1. Follow this with 1/2 turn checks winding in one direction every 10 seconds Jan 28, 2019 · On 2/16/2019 at 9:36 PM, 2 STROKE YZ DOC said: Looks like preignition occurring. 5 239­O­6 4D20 0. Check Details. 0: Needle Jet: O-8: Jet Needle: 5J9-2 (last number is the clip position) Feb 21, 2009 · The flow difference between a Mikuni 175 hex jet and a 180 is about 6cc ~3%) . Dec 12, 2019 · so, here are the specs for your carb: main jet 160, needle 6dp1-3, needle jet 182 0-8, cutaway 2. Jun 9, 2015 · Recently, my ATV (a 1997 Yamaha Big Bear 350 2x4) developed a carburetor issue where it would run rich. Oct 4, 2007 · Look under the choke lever on the flange where the carb flange meets the bracket that holds all four carbs. As mentioned above, the needle jet takes over most of the fuel delivery from the pilot circuit as the throttle is opened. If anyone can help identify this or point me to somewhere that can, I would GREATLY appreciate it Kits include an HSR 42mm or 45mm carburetor, performance manifold, rubber flange, high flow air filter, cover, chrome breather kit and mounting hardware. motohelp. Most vintage, OEM Mikuni, round-slide carbs, have a pair of bronze-alloy floats soldered to a float arm. The next two letters denote the month. Here’s our simple outline for basic tuning to get you started. 5″ – #KHS-024 More Info. 158 mains, 52 pilots, fuel screws 2 turns out. The chart also has jetting and needle adjustment specs from the oem specs book that should help with tuning. Carburetor & Fuel System Cleaner; Spiral Diaphragm; Spark Plugs; Innovation. 6 and 41. I tried searching for a tech support email for Mikuni but came up short. The #2 screw is normally adjusted to stop the pump action at about 3/4 throttle. Jan 1, 2022 · The carburetor number can be found stamped on the mounting flange face. Ok, finally got some free time and pulled the carb. A 1. Mikuni Carburetor Product Catalog #21 Click on Cover Above or Here to Open Digital Online FlipBook Click on Page Numbers Below to View Catalog as Quick Load JPG Images HOME 1 2-3 4-5 6-7 8-9 10-11 12-13 14-15 16-17 18-19 20-21 22-23 24-25 26-27 28-29 30-31 32-33 34-35 36-37 38-39 40 Dec 9, 2020 · Three Basic Types of Rochester 2 Jet 2G – Manual Choke 2GC – Automatic Choke 2GV – Divorced Choke (choke thermostat is mounted in the intake manifold) Tri-Power – The center carbs used on 1958 Cadillac, 1958 Chevrolet, 1957 and 1958 Oldsmobile, and 1957 and 1958 Pontiac used front fuel inlets. Amal Carburettor Type Number and Use Prepared by Dennis Wright scorpion@cdi. pump, so the only reason to use a large needle valve is to obtain the correct. Jun 23, 2022 · Replied by JayB on topic Mikuni Carb identification BDub said: "I am also curious about recommended jet sizes. 1970 -1980 ski-doo Tillotson Carburetor Specifications. The Carter W-1 used a tag attached to the top of the carburetor. PWK 24mm 97. Created Date: 12/9/2005 3:29:44 PM National Distributors of Mikuni Automotive Sidedraft Carburetors and Parts. if you dont want to remove the bowl, you can just remove the top, that will enable you to check the numbers on the needle itself and the cutaway on the piston (slide). valve that gives you the correct pop-off pressure for your engine. VM22 china mikuni with oval bore at slide 88CFM. Mikuni type 4/042. ** Tolerance for all adjustments is +1/8-0 Turn. 007-731 90º adjuster KIT has threads on one end, the other end swivels. email Chris at Watercraft Magic [email protected] daveb3971. Look up the manufacturer, model snowmobile and the engine size in the application section and find the correct carburetor model. 601/4 (Issue No. 90º Cable Adjuster Assembly. The last two letters denote the day. Apr 13, 2022 · Carter W-1 Identification. The numbers you are looking for on 90% of Carter carbs is 3-4 digits with an 's', 'sa', 'sb'. 99mm in length. Model. The 500HO used the Mikuni BST 40. " This is from page 4 of Series DT1 service manual, LIT-11612-14-99: A cross reference is used between the two sections for carburetor interchange. 5mm Length 5. Manufacturer Part Number: SC-00253. Some Zenith carburetors may also have the model number stamped on the throttle body. This is essential if you want to find the part of your carburetor, or to find lower assembly component parts. 8mm Slot Head14mm Length Plain, unbeaded nose Ø3. ZAMA supplies diaphragm carburetors, solenoid valves, electronic fuel injection (EFI), oilpumps, various precision machining parts to all major OEMs. com Replace if damaged. ZAMA is a well-known air-fuel-system supplier in the outdoor power equipment industry worldwide. ⓘ. 30mm Mikuni Velocity Stacks, Part No. By turning to the description section under the proper carburetor model find a similar model carburetor (No. An example: 147. I'ml ooking for a rebuild kit. The Mikuni jetting chart below matches different series needle jets with various model carburetors. This “adjustment” is necessary because even though the Amal style jet numbers shown are the EXACT FLOW Mikuni’s VM Series round slide single carburettors have proven themselves as the performance standard for use in any single cylinder motorcycle and ATV applications for motocross, enduro and trail riding, to flat track racing and road racing on both 2-stroke and 4-stroke engines. 0: Air Screw setting: 1 1/2 turns out: 28mm (VM28SC) Late Z1-A & all Z1-B: Main Jet: 112. 2 CFM (I had two) The air that is speeding up will cause atmospheric pressure to drop inside the carburetor. To get the correct parts for your Carter TQ (Thermoquad), you need to match the carburetor number, which is found at the The Amal Concentric carburetor was standard equipment on all Nortons from 1967 on. Jun 4, 2023 · Mikuni carburetors carburetor rm250 vm38Mikuni carb identification Mikuni vm-24 carburetor identification;Mikuni model carburetor number identification corp there 4wu part stack. Fuel from the pump maintains a more correct fuel/air Mikuni Jet Identification Chart. News; Careers Mikuni Carburetor Product Catalog. Part way down page are needle specifications. Simply specify Type S4 Carb. #3. Buy your Carburetor - Mikuni - VM22 - Standard Jetting from Dime City Cycles. It is sometimes called cable operated. Measure the inside diameter of the carb on the engine side. They will be found on 1960 through early 1980s Tecumseh carburetor are stamped with the Manufacturing Model Number and date code. RB. The throttle valve, for example, controls Mar 7, 2023 · Seventh number will be the type of fuel the carb is made for (gas, alcohol, etc. Set of 4 Velocity Stacks fits all Mikuni RS Series Carburetors and other carburetors with 55mm O. Bsr33-73 mikuni carb- oem yamaha kodiak 400 5te-e4101-01-00 Mikuni uses several types of floats on their aftermarket and OEM carbs. Gasket, Jet Block VM29/13 002-535. You may find other numbers stamped on the carburetor, but they are usually the part numbers of the part they are stamped on. HUAYI 39. Here are some hints to what your carburetor may be: WARNING! Here is a quick reference Motohelp Video to help you identify the Genuine Mikuni HSR 42 Carburetor. For ***Please note, this item will take an additional 4 business days to process before it ships and you receive tracking information. You should also buy 2 needles and seats and two carb base gaskets too because they do not come in the kits. There should be a series of numbers and letters that will tell you the make, model, and size of the carburetor. LE. Tech Tips; About. 007-731. The second and sometimes third characters being letters describe the taper from the clip end to the tip in 15minute (1/4th of a degree) increments. throttle position. If the needle part number is blue, you can go directly to the product page by clicking it. Actually, we recommended using the smallest needle. Most 1967-down Rochester carbs have a triangular aluminum or brass tag retained by a screw attached to the top of the float bowl. You'll find the body type on the same side as the jets, usually cast into the center of the housing. Further down you will also find Carter, Marvel Mikuni Carburetor Identification for Sizing This page is intended to help identify the type of Mikuni carb by either the top view of the Float Chamber Cover, the Float Chamber cover gasket and/or the Jet Chamber Cover gasket. #160-165 main jet on a Mikuni 42. ; Can't find what you need? Contact Us. 335*165345*167. However, he was unable to find one. Here in the United States, Wolf Creek Racing of Long Island, New York, still maintains a robust business dealing with Mikuni carburetors for vintage Nissans and Datsuns. valve in all cases. Note that the kits will be the same for both 40 and 44mm carb. 0 Dec 9, 2017 · Throttle Bodies & Carburetors; Fuel Pumps; Fuel Sensor Levels; Ignition Systems; World Class Die Casting; Two Wheel. 5 240 0. When replacing a carburetor these details must be carefully matched to the specific application. e. 0mm Thread length 50-200 (Δ 5) 210-500 (Δ 10) 520-720 (Δ 20) H5-N151067-A-SIZE Special Order M5x0. BN 38mm, 44mm Round 53-2110 *BN carbs are “Old Style/Round Body” with round diaphragm covers Kit Includes Mikuni Arm Springs (1 each - 65gm & 115gm) Kit Includes Mikuni Arm Spring (1 spring - 95gm) Mikuni American is not responsible for mechanical damage or personal injury caused by an improperly installed carburetor, operating conditions, or its installation and tuning by the vehicle manufacturer, dealer, mechanic or private individual. They work in your 40mm I series carbs. You can find the throttle cable in our ebay store. I have been searching for days and don't know what class or model this is. Mikuni American imports carburetors for the aftermarket for snowmobiles, personal watercraft and Apr 5, 2017 · Apr 6, 2017. The number will be in the format 10-nnnn, where nnnn is some number generally LARGER than 500. 0 20mm #180 #22. An incorrect pilot jet drill size can cause various issues, such as: Poor idling: If the drill size is too small, the engine may idle poorly, resulting Jan 27, 2011 · The way Mikuni Needle numberings work is: The first number is the length series. Zama carburetors are slightly more complicated. Glue the inserts using: plastic steel made by Devcon. Thread. You will get the brand new kit that is pictured. #97 needle, clip in center slot. They're perfect carbs for street riding, motocross, enduro and trail riding, as well as flat track and road racing. I need new o-rings and float gasket. Jun 5, 2022 · Keihin carburetors are stamped with a manufacturing code that starts with the letters "KE. The purpose of the pump is to inject fuel into the throat of the HS40 when the throttle is opened. Must determine model size of carburetor because chart lists by carburetor model Details. 601/3 (Issue No. I Series 46mm Square 53-2115 *Sea Doo 951 (98 and newer) Mikuni Diaphragm Cover Part No. GENUINE MIKUNI NEEDLES. 4) Needle Type Use Bore Pilot Cutaway Main Jet Position 376/1 BSA 650cc 1955-57: A10 Golden Flash Twin (Spring Frame) 1 1/16" 25 3. Check for bubbles. Mikuni carburetor number list with the associated carb kit. We have carburetor kits for most Carter AFB Carburetors including the 4000 compitition series and the 9000 compitition series. Clear. Apr 14, 2020 · Going off the chart below, it would appear I have a VM28-418 however the choke style on the VM28 is a lever-type whereas mine is a pull-type as seen in the original photos I took. When the tag is missing watch the video below to identify the correct carburetor kit. Dec 20, 2016 · I have a 2005 Yamaha 1100 Silverado with a Mikuni carburetor. An example would be 0-1654S. Needle decoding from chart of tapers below. Mikuni Diaphragm Cover Part No. 437cc. Main jet says 350 and pilot jet says 35. Street Demon. 3 or 2. 1984 to 1989 Evo models will need new cables from a 1990 to 1995 model. 5 degrees. 8 ThreadØ3. Needle valve must stand a pressure of 69 kPa (10 PSI) for 30 seconds. I took it to a mechanic who says that it needs a new carburetor. and not by engine speed. 0 ,pilot jet 30. Google "Mikuni tuning manual". 50 AUD. Popular jetting is; #20 pilot. Sustained will burn the piston, and kill the top end, along with possible bottom end damage. 5 18mm #80 #30 145­O­0 4J13 None 3. Click on Page Numbers Below to View Catalog as Quick Load JPG Images. . How about a pic of the whole carb setup not just the part number. All models were physically similar, with internal details varying to suit the tuning requirements of different engines. For the model number, you'll simply turn it around The first step in identifying a Zenith carburetor is to find the model number. That will give you the size. OEM Number(s): N/A Updraft – diecast bowl – an identification number is stamped in tiny numbers on the underside of the bowl, or on the edge of the carburetor mounting flange. Modern HSR 42 and Early Model HSR 42 Carbs are discussed May 21, 2022 · 1. We have gathered the information below from the Mikuni product catalog. you will need to remove the cable in order to remove the needle Apr 1, 2020 · In this video we show you how to identify your Needle & Seat assembly so you can make the correct purchase of a replacement. Buy now, pay later. Electronic Fuel Injection Systems; Unmatched Fuel Injection System Support; World Class Die Casting; Engine Maintenance. There are five main. In this case, our carburetor has a "C1U" body. Both 40 and 44's were made in this style. If you are wondering what Mikuni carburetor (s) your Sea Doo PWC uses, all you need is the year/model and you can look it up below. Thanks guys. 97 Banshee. Manufacturer's of CV Axle Kits for Datsun 510's and Z-cars. 1968 & later carburetor number stamped in Mikuni American Corporation is a leading manufacturer of high quality customized fuel system and engine components for motorcycles, UTVs, ATVs, snowmobiles, personal watercraft and outboard engines. Some Pontiac and Oakland units have a stamped “O” or “P” preceding the 10 Mikuni’s HS40 carburetor is fitted with an accelera-tor pump. 6 – Needle series, overall length is between 60 and 70 mm (68. With the SU documentation in hand, we can trace this back to be the front, of 2, HS4 carburators on a 1969 - 1971 1798 cc European spec MG MGB. KRS-004 15mm Mikuni To be the most precise in this step it iis best to remove the carb and open the throttle till the slide is 5/8 (62%) open and then mark the throttle and throttle body. Refer to the chart at the end of this article May 13, 2020 · Here is a quick reference Motohelp Video to help you identify the Genuine Mikuni HS 40 Carburetor. 002-065 nut. 5EL540 and T546 are all I see stamped on the carburetor. Performance features for the VM Series Carburetors include a Shown here is Mikuni Fuel Pump Rebuild Kit MK-DF52-531 for Yamaha's popular Rhino 450, 660 ATV. throttle cables from 1990 and later models can be used. #4 · Aug 10, 2016. com 5 series Mikuni Needles (All available shown in sales drop list) $ 18. Carburetor Reference Chart. 5 (Fixed) 2. 2 mm in this case) B – First taper of 0. Sep 16, 2022 · To identify the Mikuni carburetor size, you will need to look at the markings on the carburetor. Lets take the series 4 needle. 080 inches) between the white plastic lever and pump rod end. Rochester carburetor numbers are stamped into the float bowl of the carburetor starting in 1968. If it has four numbers, there will be three numbers on the top and one on the bottom generally. These carbs are designed to work on both 2-stroke and 4 We would like to show you a description here but the site won’t allow us. Is there a way to identify the carburetor so I have the ability to order parts for it? Feb 10, 2003 · In this case, fit a smaller nozzle. 26mm NIBBI Bench calibrated for 110 CFM and it pulled past 100% on the inclined manometer so it is a bit north of 110CFM. com. These are the numbers I got on my bench at 28"H2o. Before that, they are found on a tag. If they come from seat or O-ring, bubbles will exit around seat. 8mm 30-65 (Δ 5) M10/14-SIZE 6mm Hex 1BA Mikuni American is not responsible for mechanical damage or personal injury caused by an improperly installed carburetor, operating conditions, or its installation and tuning by the vehicle manufacturer, dealer, mechanic or private individual. The area above is always changing so check back often as links are added. 5. Mikuni American Corp. RE. Tillotson HD128A. See bottom of page to order the needle. from the threaded end through the orifice and out what we consider the inlet end. Mikuni Carburetor Product Catalog. The #1 screw is normally adjusted to establish a gap of about 2mm (0. Some of the smaller, new, aftermarket carbs, like the VM18-144, still use this type of float, but you're more likely to see floats like this on 1970's era two-strokes Alternative Throttle Return Spring Chart; Carb Kit Listings; Carburettor Float Height Chart; Carburettor Mounting Rubber Manifold Dimension Information Page; Jet Size Chart; Keihin Jet Identification Chart; Mikuni Jet Identification Chart; Keihin Jet Needle Data; Mikuni Float Valve Assembly Chart; O-Rings Sorted by Inner Diameter; Throttle Mar 24, 2022 · Look for 4 numbers followed by a S. If it doesn’t, hold carburetor upside down, pour oil over needle valve and retest. Mikuni jets VM29 carb carburetors and parts. Mikuni "VM" Factory Carb Specs Jetting Specs ~ Carb Body Specs Throttle & Cables, Fuel Line, Reed Valves ~ ~ ~ JETTING Carb Size Main Jet Pilot Jet Needle Jet Jet Needle Air Jet Slide Cutaway 16mm #70 #25 165­O­8 3DJ3 None 2. You need SBN carb kits. If the needle part number has an asterisk next to it, that means it has been discontinued by Mikuni and will not longer be available. It has a cable hooked to a linkage that pulls the slide barrel up when the throttle is pulled. Click on Cover Above or Here to Open Digital Online FlipBook. metering systems inside most motorcycle carburetors. Mikuni Products Catalog JPG Pages: 2-3 4-5 6-7 8-9 10-11 12-13 14-15 16-17 18-19 20-21. That is 3 numbers followed by a S. Northridge, CA 91364 USA. needle valve can flow the maximum amount of fuel that the Super BN can. The B&B series carbs also use a L-N-L-N notation, ie D6E3. au Data solely from Amal Publications: List No. Manufacturer: Mikuni Corp. This is the Type S4 version of the 40mm and 44mm carbs, also called the 4 bolt top cover. Looking at the back of the butterfly will confirm size, 165 is a 40mm carb, 175 is a 44mm carb. 3 (I put the period in to hold spacing) The pilot jet is responsible for regulating the air/fuel mixture in the carburetor at low throttle positions, and the drill size of the jet determines the amount of fuel that flows through it. (Please identify your needle and choose carefully as jets are non-returnable items due to the undetectable risk of customer tampering) Needle Number. More Info. It could be 40. These parts include the throttle valve, jet needle, main jet, pilot jet, and air screw. We are your #1 source for DIY Vintage Motorcycle Parts. 1) Idle Circuit: With your idle circuit, start at 1 1/2 to 2 turns out on the mixture screw and then wind your idle screw back to give a very slow idle whilst at operating engine temp with the bike upright. Needle Taper Diameter Dimension Chart (a)=Needle Length (mm) (b)=Length between points (x) and the taper point (Y) 1=10mm 2=20mm 3=30mm 4=40mm 5=50mm Re: how to identify Mikuni carbs The oem line size is 6mm AKA 1/4 inch in SAE terms. Model Number (partial): First Line: 4WU 20 Second Line:???42 Apr 28, 2012 · Thanks. This could either be in terms of inches (or millimeters) or markings on the horizontal intake and exhaust parts of the carburetor. You're going to be looking for body type and the model number on opposite sides of the body. PART NUMBER PICTURE DIMENSIONS AND FEATURES SIZES 4/042-SIZE 6mm Hex 1BA Thread 11. Kenz 720cc 11:1 stroker, +1 valves, Mega Cycle X-4 Cam, Sparks 6x Big Core, Keihin 35mm FCR's. #170-175 main jet on a Mikuni 45. Check the number - if your carburetor has a Welcome to Mikuni Power - Official Home of Mikuni Carburetor 88. The faster the air moves, the lower the pressure inside the carburetor. The Mikuni VM carburetor diagram illustrates the various parts and their locations within the carburetor body. 5360170370The asterisk behind the Amal style jet numbers indicates that you can use 5 numbers higher or lower than the indicated number and still be in the range of its reverse st. Retighten as necessary. Generally, mechanical carbs have a heavy spring to snap them shut. KRS-003 70mm Mikuni Velocity Stacks, Part No. G1L. RC1/RC2. * Unless otherwise specified, idle speed is 1,800-2,200 RPM. MikuniPower. Each component plays a crucial role in delivering the right amount of fuel and air mixture to the engine. Example from 2003 Honda CR250 needle: 6BHY38-73. The model number and Zenith identification number are not the basic-index. The float bowl cover is held in place by 4 screws - on most carburetors. Tilly HL304A 94CFM. KRS-002 50mm Mikuni Velocity Stacks, Part No. D. Needle jets are available in an assortment of sizes for most of the Mikuni round-slide and flat-slide carburetors. K7011. For exploded view carb parts. kc ab jz dd nw wf af ba uw yw