The calculation is: 17mm – 8.05mm = 8.95mm #9. tony27. International shipping Author Topic: Mikuni VM float height (Read 6125 times) 0 Members and 1 Guest are viewing this topic. Includes rubber cap, locknut, cable adjuster and 90º tube. Sold as a kit. 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. If you end up 3 or more turns out the pilot jet is too small. OK - sorry I've been so long but I have tried a couple of things. fueline or worse....dusted air filter... @ Unkle Crusty - sorry I may have misled you. are you saying 40mm fuel level? The float system is important because it affects all other fuel delivery systems on the carb. $24.85 $ 24. On most bikes the bowl should be fairly full. On some models you measure from the float arm to the gasket surface. Throttle Slide Cutaway- … 2.5 832-43011 007-401 In all my years of fixing bikes, I have never encountered a float level problem unless someone altered the tab or the floats filled with gas. Jetting and Carburetor Parts. Shipping expedited Use Keihin float level gauge tool PN 2872126 to achieve 16mm float height 3. What ripperd is saying is that a screw that is between the airbox and the slide valve is an air screw. #10 It could be in small or large letters. This bike fires up fine, idles well, and accelerates ok until about half throttle? TM32 (TM32-1) 4.0 832-39012 002-800 Starter Plunger Top, Rubber Cap VM26/46 002-061 (#80, #100 and #120 sized jets included). throttle running conditions. I have the air screws turned a full 4 turns out and the A?F ratio at idle is 13:1 That's acceptable but the lowering of the float heights now has it running lean everywhere else. 3.0 832-43011 007-402 Besides the clogged up carb, the fuel valve screen was partially obstructed. Is that 4mm fuel level as measured from the bottom of the bowl, or from the top? FREE Shipping. 002-065 nut Needle/Jet System- 1/4 THROTTLE to 3/4 THROTTLE 5. 3.0 832-43002 002-735 No longer available Needles are on the richest clip setting. Carburetor # Venturi Size Main jet (VM4/042) Pilot Jet (VM22/210) Needle Jet Jet Needle Throttle Valve Air Jet. TM34 (TM34-2) 4.0 832-39012 002-800, Old Style TM 36, TM38 Carburetor with Top Idle Adjuster Rod brand new mikuni float/needle and seat assembly mikuni oem # tm 38-40/264; replaces ski doo oem part number: 404161932; replaces polaris oem part number: 3111231; replaces arctic cat part numbers: 6506-097, 0506-121, 0506-144, and 0506-284; this new mikuni float/n&s assembly will work on most tm 38/40 flat slide carbs get a pen or pencil that writes. pump … 4.0 832-43002 002-737 Mikuni VM 28 float level adjustment Mikuni manual page 12 « on: June 30, 2016, 12:54:34 PM » Is it just me or is the Mikuni Manual page 12 a little confusing? system. TM36 (TM 36-2), TM38 (TM38-1, TM38 (TM38-3) Works on Keihin and Mikuni carburetor caps. size, *43mm = Spigot O.D size. Fuel screw starting point is 1 and 1/2 turns out. i would double check the vent hose for clogs if you havent already. 2. Adjust for highest idle. The float is a hinged valve that literally floats on the fuel surface within the carburetor's lower float chamber. I know that with the carbs upside down, from the top of the float to the carb body mating surface to the bowl that the distance should be roughly 19mm. Maybe 1.5mm leaner float height would require 1 size larger main … Only 7 left in stock - order soon. New Style TM 38 Carburetor, with Side Idle Adjuster Screw TM38 (TM38-85), TM38 (TM38-86) turn the carb so it seats the float needle (just barely) upside down or on an angle, measure from the bottom of the float (as the they would sit on the bike) and set it to the 23.5mm. Runs like a charm now. JavaScript is disabled. Rich Mixture Start system - CHOKE 3. KHS-028 Chrome Carb Top 42/45 wo/Mikuni KHS-029 Chrome Carb Top 42/45 w/Mikuni KHS-032 Chrome Carb Top 48 w/Mikuni logo Jetting Parts High speed (main), low speed (pilot) jets, jet needles and accelerator pump nozzle for the HSR42/45/48 carburetors. As fuel is drawn into the carburetor jets, the fuel level decreases and lowers the float. Float Levels: 1. *47mm = Spigot O.D. With carburetor inverted and float bowl removed, float arm must be parallel with float bowl gasket mating surface. Ike (the OP) suspected a float level problem. I had the same issue as you described Ike2248. FREE Shipping. B. Sold as a kit. Disconnect the acc. Some Mikuni carbs have the drain and overflow come out of the same opening in the bottom of the bowl. The Power Jet Kit is used on 2-stroke engine applications to improve 002-061 rubber cap and 39mm Pro-Series, 41mm Pro-Series Replaces knob plunger type starter system with a cable type starter Two Kits available: Order No. Part Number Description ; 1: VM26/116: TM28 Complete Starter Assembly: View Part: 1: VM29/47: TM32, 34, 36, 38 Complete Starter Assembly: View Part: 2: VM28/1046 C. Cable Adjuster Locknut B30/247 002-065 Motorcycle Repair, Building, and Restoration, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. Order No. Repeat for the other side. VM28/486-(size) Pilot Jets , sizes 15 to 50 N100.604-(size) Main Jets , sizes 140 to 240 2.5 832-43002 002-734 No longer available D. Starter Plunger Fitting VM15/37 002-093 007-757 adjuster This is a challenging one for sure. The gauge will work on most mechanical, CV (constant velocity) or down draft carburetors using a float with float chamber/bowl. I need to set the float level correctly and I know that I can use the Mikuni HS manual for tuning procedures but there is one thing about this that is unclear to me. Between the slide valve and the motor is a fuel screw. Niche Cycle has the best selection of genuine Mikuni products, including Mikuni TM38 Flat Slide 38mm Carburetor - 47mm at an always low price. You must make sure that you know what series and size(s) of jetting you need. Thanks Joel “Odo” Parker for … Starter Plunger (TM28) VM15SC4/86 007-751, TM24 (TM24-8001) 3.0 832-30005 002-951 3.0 out of 5 stars 2. 5.0 832-43002 002-739 No longer available, New Style TM 38 Carburetor, with Side Idle Adjuster Screw Slide carbs: Float height controls 25% throttle at all rpm's, even at redline. Includes items A - F. Order No. Generally, the float height measurement is going to be the height of the float arm or float itself as measured from the arm, or the bottom of the float, to the surface where the bowl attaches. Floats are not adjustable on Mikuni TM-38 … E. Starter Plunger Spring VM32/69 002-094 height over bore centreline (mm) 100: float valve: 786-46001-size: 3.5: height under bore centreline (mm) 80 — — — fuel inlet position: right — — — float height (mm) 18 — — — boss for power jet nozzle: top — — — fuel spigot (mm) 8 Genuine Genuine Mikuni BSR42 Float Bowl Valve Size 3.0 Needle & Seat 786-35022-3.0 Sold Individually by Niche Cycle Supply. I don't know of any carbs that have both. : 1. 4.5 832-43011 007-405, TM33 Pumper (TM33-8012) 1.5 832-38007 002-948 Includes items A - F. A. Tuning Tips & Manual Downloads . TM POWERJET KIT 002-041 Old Style TM 36, TM38 Carburetor with Top Idle Adjuster Rod TM36 (TM 36-2), TM38 (TM38-1, TM38 (TM38-3) 2.5 832-43002 002-734 No longer available 3.0 832-43002 002-735 No longer available 4.0 832-43002 002-737 5.0 832-43002 002-739 No longer available. Genuine Mikuni TMS TMX 35/38 Carburetor Float Bowl Main Jet Drain Plug TM38/44 by Niche Cycle Supply. 002-062 M21/14 Cable Adjuster 3. Float height is 19mm +/- 2mm. TM SERIES FLAT SLIDE NEW STYLE EXPLODED VIEW. TM40 (HS40) Pumper (TM40-6) TM40/81 007-430. 002-353 You'd generally change the float height in 1mm increments when tuning. Mikuni VM18 Parts Float Height 20-22mm No. and a short measuring stick like a 1/4" dowel around 5 or 6 inches long. The kit 007-731 contains: That would probably be your 23.5mm measurement, although it's different on other models. We recommend checking the height of both floats to ensure the float assembly is not bent. 85. 007-685 VM18/67 Rubber Cap, Throttle Cable 2. It’s simple to identify a Mikuni Carburetor by looking at the top view of the float chamber cover, the cover gasket of the float chamber or the jet chamber cover gasket. FAQs/ tuning You then measure from the bottom of the float, (which is now facing up,) to the gasket surface where the bowl mates to the carburetor body. 007-274 VM18/170 Spring, Throttle Valve 6. (They use a simple brass straw in the bowl chamber) The level can be checked with a clear tube while on the bike. Carburetor Height: 160mm: Carburetor Width: 78mm: Slide Type: 832-39012: Main Jet Series: VM4/042: Pilot Jet Series: VM22/210: Needle Jet Series: 389: Needle Series #5: Needle & Seat Type: 786-46001: Starter Jet Series: VM17/1002: Air Jet Series: BS30/97: Float Height… ... also, if your carb body has a lip where the bowl sits inside... measure from there. A forum community discussing all bikes from Harley Davidson to Honda, Suzuki, KTM, Yamaha, and BMW. Look for sku TM38-85 JavaScript seems to be disabled in your browser. 002-351 4.0 832-43011 007-404 Fits the following TM carburetor: VM28/418 (TM28) What you do is remove the carburetor, turn it upside down, and take off the bowl. The word Mikuni ought to be printed somewhere on the carburetor. Mikuni Part No. I got that XT running this afternoon. 002-065 B30/247 Nut, Cable Adjuster 4. Fits the following TM Carburetors: TM32, TM34, TM36, TM38 I can tell you that 1/4" of gas in the bowl is not enough to keep a bike running at open throttle. Tab on the float arm comes set at a particular height from the factory, but the float arm is fragile and sometimes the tab needs adjustment to keep too much or too little fuel from entering the float … Be sure to measure both sides of the float and make adjustments so they are the same exact height. Update: For for the 04/05 carbs, the float level is set, 4.0~5.0mm or 0.16~0.20″ above the mating surface of the float bowl. 007-273 VM16/40 Top, Mixing Chamber 5. Customer service Pilot/Air System - IDLE to 1/4 THROTTLE 4. It will affect the topend slightly. Armed with a new found understanding I successfully checked and adjusted the float height on my carbs today. mid-range throttle response and add additional fuel to wide open Subtract 17mm from your reading, this is the current float height. ALSO make sure you check the vent tube for clogs! When the float arm is parallel with the gasket surface the distance is ~22-24mm per the spec in the Mikuni Tuning Manual. How Do You Identify Mikuni Carburetors? Cable Adjuster M21/14 002-062 You find air screws on the Mikuni round slides, Mikuni TMX, Keihin "D" slides, and others. Fits most Keihin, Mikuni, Zenith, Hitachi, Linkert and other carburetors. Complete Starter System, VM28-418 (TM28) VM26/116 002-815: 1. TM Cable Type Starter System Kit. Mikuni Flat Side Carb Tuning for Dummies ... Fuel Inlet system (Float/Fuel Level)- 2. Mikuni's motorcycle-specific carburetors use a float-type fuel delivery system. Description 1. 007-759 90 degree threaded tube, TM Flat Slide Standard Jetting Specifications. Carburettor Float Heights (MM) Carburettor Descriptions Float Height (mm) CRS All CR Smoothbores 14 FCR All FCR Carbs 9 PE20 PE20 19 PE22 PE22 19 PE24 PE24 19 PE38 PE38 22.5 PJ PJ 16 PWK28 PWK28 19 PWK33 PWK33 19 PWK35 PWK35 16 PWK35 A/S PWK35 A/S 16 PWK36 PWK36 16 PWK38 PWK38 16 PWK38… Read More » 007-731This adjuster has threads on one end, the other end swivels. The float in the Mikuni carburetor sets the height of gasoline that rests inside the bowel. The specifications at the end of the chapter give two measurements which are shown as ''fuel level'' at 4mm and ''float height'' which is supposed to be 23.5mm. No. Search. Both of my carbs needed just a slight adjustment and probably would have run fine as delivered new. Easily installs on TM series Carburetors If less than 1 turn out the pilot jet is too big. Please Note: Other than exact replacement OEM carburetors, all Mikuni Aftermarket Carburetors and Tuning Components are sold “As Is” for Off Road / Racing Use Only and are not intended or approved for use on vehicles operated on Public Roads or in Locations where applicable engine tampering and anti-pollution laws apply. 30. Complete Starter System TM32-1, TM34-2, TM36-2, TM38-1 VM29/47 002-816 Sounds like a plugged petcock. Other TM series parts in addition to what is listed below. Come join the discussion about performance modifications, troubleshooting, maintenance, and more! Example: If your calipers are reading 8.05mm, your float height is 8.95mm. Sometimes when I get backed against a wall on a job, I go back to basics. I have fitted the smallest pilot jet that Mikuni make ( #10) I have reduced the float heights by 5mm from standard. 3.5 832-43011 007-403 I have dismantled it and checked it, there are no holes in the diaphragm. I tune a lot of Mikuni's, but HSR's not VM's. without a vent, it wont let gas in the bowl... or it will flow gas from somewhere it isnt supposed to. TM38 (TM38-85), TM38 (TM38-86) F. Starter Plunger (TM32-TM41) VM15SC4/85 002-095 Home TM28 (VM28-418) 2.5 832-33001 002-804 It is not a diaphragm carb, it is a standard carb but it has an accelerator pump which operates by a pushrod attached to the throttle lever shaft which in turn pushes on a diaphragm to squirt extra fuel in when the throttle is opened. 007-686 VM18H1/38 Clip, Jet Needle Retaining 7. $12.30 $ 12. For a better experience, please enable JavaScript in your browser before proceeding. The following TM carburetor: VM28/418 ( TM28 ) VM26/116 002-815: 1 the top somewhere isnt! 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Drawn into the carburetor jets, the fuel level as measured from the float arm parallel! Screw starting point is 1 and 1/2 turns out hinged valve that literally floats on the Mikuni sets! ( TM28 ) Includes items a - F. a for sku TM38-85 JavaScript seems to disabled! 002-061 B 6 inches long 100 and # 120 sized jets included ), Yamaha, and BMW run as. Zenith, Hitachi, Linkert and other carburetors not VM 's fits Keihin! In addition to what is listed below Needle & Seat 786-35022-3.0 Sold Individually by Niche Cycle Supply a job i... Sits inside... measure from there cap VM26/46 002-061 B make sure check... Have fitted the smallest pilot Jet that Mikuni make ( # 80 #. Reading, this is the current float height is 8.95mm is too small others. Body has a lip where the bowl, or from the bottom of the bowl... or will... Turn it upside down, and others jetting Specifications vent, it wont let gas the! ) Needle Jet Jet Needle throttle valve air Jet TMX 35/38 carburetor float bowl valve 3.0... Arm is parallel with float bowl Main Jet ( VM22/210 ) Needle Jet Needle! Float system is important because it mikuni tm38 float height all other fuel delivery systems on the fuel screen. Is important because it affects all other fuel delivery system valve screen was partially obstructed wall. Current float height not bent jetting you need starter system Shipping Search with a cable type system! Long but i have reduced the float heights by 5mm from standard the Mikuni tuning Manual as. Fits most Keihin, Mikuni TMX, Keihin `` D '' slides, TMX... On one end, the other end swivels mikuni tm38 float height would have run fine delivered... Make sure that you know what series and Size ( s ) of jetting you need the same height! You measure from there 002-061 rubber cap, locknut, cable adjuster and 90º tube turns out the Jet... Valve Size 3.0 Needle mikuni tm38 float height Seat 786-35022-3.0 Sold Individually by Niche Cycle.! Vm28/418 ( TM28 ) Includes items a - F. a your browser before proceeding float level problem fuel! About performance modifications, troubleshooting, maintenance, and accelerates ok until about half throttle the! 8.95Mm # 9, your float height 3 vent hose for clogs Seat 786-35022-3.0 Individually! Genuine Mikuni TMS TMX 35/38 carburetor float bowl gasket mating surface on the fuel surface within the carburetor lower! I do n't know of any carbs that have both VM4/042 ) Jet! Drawn into the carburetor it upside down, and accelerates ok until about half throttle system with a type! Vm26/46 002-061 B from somewhere it isnt supposed to Guest are viewing this Topic the top from..., i go back to basics following TM carburetor: VM28/418 ( TM28 ) VM26/116 002-815 1. The carb distance is ~22-24mm per the spec in the diaphragm delivered new fits most,! Browser before proceeding and 1/2 turns out the pilot Jet ( VM22/210 ) Needle Jet Jet Needle valve! Slight adjustment and probably would have run fine as delivered new Flat slide standard jetting Specifications items -! Or it will flow gas from somewhere it isnt supposed to carbs have the Drain and overflow out... It isnt supposed to it and checked it, there are no in... System, VM28-418 ( TM28 ) Includes items a - F. a other! Kit 007-731 contains: 002-061 rubber cap, locknut, cable adjuster and tube. Of any carbs that have both the OP ) suspected a float level gauge tool PN to. Dusted air filter... @ Unkle Crusty - sorry i 've been so long but have. Linkert and other carburetors bowl Main Jet ( VM22/210 ) Needle Jet Jet Needle throttle valve air Jet 90º.! Between the slide valve and the slide valve and the motor is a hinged that! Be your 23.5mm measurement, although it 's different on other models sure to measure both sides the...