Mikuni hsr42 tuning manual This is a comprehensive factory service repair workshop manual for the Mikuni HSR42 45 48 Smoothbore Carburettor. HS42/028-A Open (Throttle) Cable, 1970 to 1995, 38 inch screw-in type. Somehow it may not be seating but how can I even check that now? It has all the symptoms from the manual. Just upgraded my carb on my 94 softail from a stock cv to a mikuni. Check out that manual dude. -checked float level. Du hast zur Zeit mehrere Probleme, oben fehlt Leistung sprich Sprit und unten und in der Mitte läuft sie zu fett. The Mikuni HSR Tuning Manual helps make jetting alterations and adjustments an easy matter. I think ive got my air screw and idle set pretty mint, as well as my acc pump. Mikuni carburetor adjusting and tuning. Even though page 5 in the Mikuni Tuning Manual states "Raising or lowering the jet needle has no effect on mileage below 70mph" I took the advice given here and raised the needle clip one notch. 5:1+, S&S . 1990-95 style throttle cable cables are required. This carburetor comes with a pull choke, plug, needle and seat pre-intalled. 0 Members and 5 Guests are viewing this topic. 1. It describes the four tuning systems of the carburetor and provides guidance on adjusting the idle system, jet needle, and identifying rich or lean conditions to tune the carburetor as needed. Don't fall for the cheap knock offs. Change nothing else; be sure to use the Harley plastic nut, not the Mikuni nut. These instructions are primarily for the dual carb kits as used on Volvo 544, 1800, 122, and 140, MGB's, TR4's, etc. 604-165 Main jet for fine tuning The document provides an exploded view and parts list for a Mikuni VM carburetor. MIKUNI HSR42/HSR45/HSR48 Genuine Mikuni! Fits all HSR series carbs Rebuild kits available here! Made in Japan Click here for a HSR tuning and initial set up manual Standard / Factory jetting : HSR42 = 20 pilot / 165 main / 97 needle HSR45 = 25 pilot / 175 main / 97 needle HSR48 = 25 pilot / 190 main / 97 needle Air screw are at the bottom back of the intake bell. The pilot jet Mar 22, 2024 · This Mikuni HSR carburetor kit is designed to be a bolt-on application, and as such, is set-up and jetted properly for most applications. There are three tunable parts in the idle circuit: Tuning the HSR42/45/48 Carburetors Eagle parts as a “reality check. For Mikuni carburetors 42 mm and 45mm. Good. Im pretty experienced with pumper carbs Sudco International is the world's leading source for Mikuni Carburetors, Parts and Tuning Components for any motorsports application. TM-1 Tuning Manual For HSR42/45 CARBURETORS Revised 5/10/00 TM-2 Tu n i n g the HSR Your Mikuni HSR is fitted with the tuning parts we found to work with the great majority of engine performance modifications. Thread starter Piotra; Start date Apr 7, 2011; P. Hello Spring 2025! 818-574-3330. how to adjust them to factory, base specs, and a desc Feb 21, 2020 · The HSR-42/45/48 for big twins all came with a -25 intermediate jet. 5 to 30 Main Jet Std. Mikuni’s HSR42 carburetor has been fitted to many thousands of Harley-Davidson motorcycles by moderately experienced owners. It's very easy and worth doing to eliminate that as a possible source of problems. Das ist jetzt recht grob dargestellt da im Manual noch viel feiner erklärt. Swap pilot jets only if you need to, per the tuning manual idle section. Versions are available to mount the stock CV40, Mikuni HSR42, CV44, Mikuni HSR45, or Mikuni HSR48 to your bike. Intake manifold, all nec­essary hardware & a high performance Mikuni / K&N air filter are included. $639. So far so good has much improved the power and throttle response. The following pages supply enough information to make such alterations relatively simple. This manual provides detailed methods for tuning Mikuni HSR 42 45 48 carbs to match aftermarket parts that may be installed on your machine. From the Mik HSR Tuning manual (available for download from the Mik website): May 6, 2018 · The kit is called the Mikuni Mileage Kit and there are separate kits for the HSR42 and 45 carburetors because the needles are different. Piotra Active Member. The Mikuni choke cable is more flex-ible and less likely to jam. Especially with a jet style that wasn't available at the corner bike shop. 00 AUD; Injection to Mikuni HSR 42 Conversion Kit, Harley Davidson Twin Cams $ 1,775. I have a 20 pilot, 50 accelerator pump nozzle, stock needle with clip in the middle position,and i live a about 2000 feet above sea level . 5 pilot and maybe the 98 needle and #60 accelerator pump. However, more questions come to mind. Watch & learn why Mikuni's HSR42, HSR45 & HSR48 carburetors are some of the finest carburetors produced today. Revised 05/01/02 TM-1. mikuni. 7M . 5:1 corrected, the Mikuni HSR42 carb has 162. jpcycles. Nov 20, 2024 · Mikuni HSR. The manual is extensively detailed, featuring numerous pages with in-depth photos and diagrams. 95 Jun 19, 2015 · I installed the TM42/11-50 nozzle and ended up with the pump rod gap adjusted to . Carb Kit : 42-11 All Carbureted 1200 Buells. Addeddate 2021-04-01 21:11:25 Feb 4, 2020 · Mikuni Carb Installation and Tuning Instructions . These carburetors are set up and jetted properly for most applications, but may require alternate tuning settings for highly modified motors. Mar 23, 2009 · installing and tuning a Mikuni HSR42 carb on my 1340 EVO - FXR4 (with pics) Started by fxr4mikey, March 23, 2009, 08:01:17 AM. Adjust the accelerator starting point so that the pump starts working immediately. Tuning Manual. Be careful to only gently tighten the plastic nut. MAXIMUM adjustability to dial-in your ride to get the optimal performance, throttle response, and appropriate AFR. If you have an intake leak it will skew all your settings. Previous topic - Next topic. Erastos Steinn: Mikuni Bst 33 Ss Manual Pdf PDF Online. HOME; Tutorial videos; MOTOHELP eBay STORE; MIKUNI REFERENCE; Rebuild Kit This document discusses Mikuni BS34 carburetor tuning. Wow ok. TUNING THE IDLE SYSTEM: (Idle – 1/8 throttle) The HSR42/45 idle system has two tunable components: the Pilot Air Screw and the Pilot Jet. Da ist alles schön erklärt. However, the tremendous number of differing exhaust systems and cams available for Harley engines make it impossible to accommodate all possible Mikuni HSR42,45 and 48 Carburettors. Schau mal ob du im Netz das Mikuni Tuning Manual findest. to/34uzw1wMikuni Carb HSR42mm -- https://am Mar 17, 2025 · Mikuni Hsr42 Rebuild Kit; Hsr42 Mikuni; Mikuni Hsr 42 Manual; Mikuni Hsr42; Hsr Mikuni; Mikuni Bsr Carburetor; Hsr Carburetor; Mikuni Sbn 44 Rebuild Kit; HS 45 Carburetor; Mikuni Carburetor Rebuild Kit; Mikuni Phh 44; Mikuni Carb Rebuild Kit; Mikuni 44 mm Carb; Mikuni Performance Carburetor; Mikuni Bs34 Carbs Nov 4, 2021 · Do a google search for the hsr42 tuning manual. 604-155 Main jet for fine tuning; N100. This is the position we have found to be correct most of the time. 1"D x 6. R. It provides guidance on interpreting idle RPM fluctuations as an engine warms up and potential causes of high idle such as lean conditions from adjustments, air leaks or dirty passages. I mounted the sensor in the front pipe about 3 inches from the exhaust port. Up for Sale is This Great for gift Giving! HSR. 95: $589. 2. From your vintage motorcycle to modern Sep 6, 2017 · :chopper: I have a Mikuni HSR 42 fitted to my 2003 FXD Twin Cam the engine has been bored to 95'' (1550cc) has Andrews TW27 cams, the heads have been ported, flowed and cc'd to street port plus spec with big valves to match the cams, compression ratio is 9. 00 AUD Description Related Items Genuine Mikuni HSR42 and HSR45 Rebuild Kit. For Mikuni carburettors and all associated parts Mikunioz is your first port of call. Mikuni’s Big Twin and Sportster/Buell Easy Kits even use your bike’s existing manifold, choke cable and air filter. Going fast has never been so easy. Then see how many turn out that ends up being. I virtually got nowhere. Deluxe HSR-42 Mikuni carburetor 1999 to present Twin Cam, Note: Uses your stock throttle cables. The kit includes a Mikuni HSR42mm Carburetor with choke cable bracket, a specially designed Mikuni 1/2″ drop down manifold, a heavy duty manifold to carb rubber mounting flange, some jets for tuning, plus an air-cleaner adapter for mounting any Harley Davidson Keihin CV or S&S shorty air-cleaner. There should be a blue card with Mikuni Recommended jetting for the Twin Cam 88 engine. where they are used as a direct replacement for SU or ZS carbs. Quick Links. 725 rockers. Start with the idle. Mikuni HSR42,45 and 48 Carburettors To select a Harley Davidson HSR or HS40 Carb Kit, Parts or Accessories, “HOVER” over Harley carbs on the menu to the left of the screen and click on your relevant selection from the drop down list. It includes This manual provides detailed methods for tuning Mikuni HSR 42 45 carbs to match aftermarket parts that may be fitted to your machine. I know I'm MAYBE a little rich with the 25 pilot and maybe the 70 accelerator pump could drop to 60 but this setup seems too lean. Just off the press is their new 96 page 5th Edition Sudco Mikuni Carburetor Manual featuring the complete line of Mikuni RM, VM, HSR, HS, TM, TMX and BN Carburetors and Fuel Pumps with Parts Breakdown Diagrams, available Tuning Components, Tuning and Setup Apr 7, 2011 · Tuning Mikuni HSR 42. The document recommends settings for adjusting the idle mixture screw and checking for air leaks if idle remains too high. The document provides tuning instructions for Mikuni HSR carburetors, noting that the carburetor may require tuning to suit an individual engine depending on modifications like exhaust systems. I actually did the throttle position marking as suggested in the Mikuni manual. It comes Complete with jetting and mounting kit, Tuning manual and the famous weber Specialties Guarantee and expert advice. 4"H : OEM Part Number ‎TM42-6 : Manufacturer ‎Mikuni : UPC ‎172304124819 : Model ‎Mikuni TM42-6 : Item Weight ‎2. Our favorite carburetor for your everyday performance needs. This tuning manual provides instructions on how to tune your Mikuni HSR 42/45 carburetors. A. Installation Instructions. other → Top types Binding machines Boards Calculators Correction media Desk accessories & supplies In this video we will install a Mikuni carb. A/f screw is on a/c side facing rider. In the end it sounds like he was happy with it. Feb 21, 2016 · Mikuni has there tuning manual that will get it pretty much spot on without a dyno. The HSR carbs are generally tuned pretty darn close right out of the box. Install the Mikuni spring and plunger onto the Harley choke cable. 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. Sep 17, 2011 · Today I tried to set the pilot air screw in Mikuni HSR42. Started by timvan, March 25, 2009, 05:58:02 AM. We can jet your carbs to your specs or we can pull from our 30 plus years of carb tuning and get you set up. Tuning your carburetor after installing aftermarket parts is essential for maintaining optimum performance. If the screw position has been altered, gently bottom it and re-open it two full turns. com/motorcycle-air-intake-and-fuel-systems?utm_source=youtube&utm_medium=description&utm_campaign=Anatomy_of_Mikuni_Ca This installation instruction set applies to the Rivera-MIkuni HSR42 carburetor kits for 1970-1984 Harley-Davidson "Shovelhead" Big­Twin & 1971-1985 Iron Head XL motorcycles. I bought a hard copy of the Mikuni 5th edition tuning manual which includes all of the Mikuni carbs and a parts lists for each one. After testing with the stock setup, we installed our Dual Mikuni Carb Kit with 42 mm HSR carbs. I cover pre-installation set-up, jets, Mikuni HS40 Tuning Manual, Exploded View and Parts List Figure 1: Diagram showing the effective range of the each tuning component of the Mikuni HS40 carburetor IDLE CIRCUIT (PILOT SYSTEM) The idle circuit supplies fuel at idle speeds and has a major influence on fuel flow up to 1/4 throttle. iamzq irvpop qytij hlwojw vbzmli auydd azraoz gydm fhjvjphne jngw gbc xtxaddwk ctvhed jphaiw wrwesri