The Linkert Book I ship the Linkert Book to Canada I ship the Linkert Book to United Kingdom I ship the Linkert Book to Australia I ship the Linkert Book to Japan I ship the Linkert Book to Belgium I ship the Linkert Book to Germany I ship the Linkert Book to Denmark I ship the Linkert Book to Finland I ship the Linkert Book to France I ship the Linkert Book to Greece I ship the Linkert Book to Italy I ship the Linkert Book to Netherlands I ship the Linkert Book to Norway I ship the Linkert Book to Portugal I ship the Linkert Book to Sweden I ship the Linkert Book to New Zealand I ship the Linkert Book to Spain I ship the Linkert Book to Switzerland
The Linkert Book
“The Linkert Book”

by Jeffrey Diamond

“Harley-Davidson” name for reference purposes only.
Not affiliated with Harley-Davidson Motor Co.

Linkert carburetor

Powered by

    This is the complete




IBRARY booklet on the Linkert (L&L) Model “M” bronze carburetor, as used on all Harley-Davidson motorcycles 1933-56 (and some until 1965). This includes: Knucklehead EL 61” & FL 74” 1936-47; Panhead EL 61”, FL & FLH 74” 1948-64; VL Flathead V, VC, VL, VLD, 74” VLH & VHS 80” 1930-36; 45” Flathead G, GA, GE, R, RL, RLD, W, WL, WLA, WLC, WLD, WLDR, & WR solo, military & Servi-Car 1933-58; XA military; K, KK, KH, KHK, & KR Models 1952-65; U-Series Flathead U, UL, UH & ULH 74” & 80” 1937-48 (sorry, not Sportsters).
    Although I’ve written this primarily for H-D models, the information is applicable to Indian Chief 74, Chief Bonneville & Blackhawk 80, Scout & Sport Scout 45, Junior Scout 30.50, Motoplane, 841 & 741 Military, and Four Cylinder since 1933.
    If you own (or plan to own) one of these great classics, they all came factory-equipped with a Linkert carburetor! For best performance, you should learn all you can about the Linkert carburetor, and how to get the best results from yours.

Linkert M-74
Linkert M-88 carburetor

    This is not a repair manual, but begins where they leave off, and goes far beyond into fine tuning, improvements and modernization. Use it with your service manual for best results. Not an expert mechanic? You’ll still find this useful to identify what parts you need, detect wear and damage, mis-matched parts, etc. - take it along to the next swap meet.




IBRARY is the original source of side-valve performance (since 1971). Click here for a brief bio on the author: Author’s biography. This information is not reprinted from other articles, magazines, or factory literature and is not available anywhere else, and not included in any of my other books; click here for other related titles: Victory Library selections.
    I guarantee that you’ll find information in this booklet you’ve never seen before, and that will help you plan and complete your Linkert project.
    Consider this: if this booklet saves you from making even a single mistake or bad purchase, or gives you one new idea, doesn’t that make this purchase worth while? The price is a small fraction of what you have invested in the carburetor - plan more intelligently, and get better results.
    This booklet is stapled in paperback to save printing costs, includes all the following subjects in 59 pages (over 45,000 words), over 30 black & white illustrations & diagrams plus 31 data tables:
    How the Linkert Works; an in-depth examination of how the different circuits operate, exactly what each component does, how to interchange parts and make adjustments. This is the only place you’ll see this information (much more detail than the factory service bulletins).
    Linkert Speed Tuning; any Linkert carburetor can be adapted to another motor, or fine-tuned for better performance with these simple modifications and adjustments. This chapter explains how to make high-performance modifications, adapt the larger 4-bolt 1” model Linkert to the 45 or U-Series, improve throttle response, make adjustments for hot cams, more air-flow, includes formulas, list of tools & supplies, and a worksheet for you to record your progress. No complex machining is required.
    Linkert Carb ID; gives the body casting size, serial number, throttle disc (butterfly) & venturi size, and application for more than 50 Linkert models (including knucklehead, panhead, 45, UL, K & KH Models, Indian, etc.).
    Linkert Carburetor Selection; can’t find the original Linkert carburetor for your motor, or don’t want to use it? This chapter explores possible alternate choices, depending on your motor type, size, intake manifold, cam timing, etc.
    Linkert MR-5; can’t find (or afford) a big factory racing Linkert for your hot 45? Here’s how to make a Linkert “MR” replica for your WR or racing WL from the more easily available M-74B.
    Dual intake manifold fabrication; how to convert your engine to dual Linkert carburetors, size selection, what parts are needed for your current carburetor, how to make your own individual manifolds from common materials.
    Tuned length intake manifolds; how to make calculations for more power, including 5 Tables of pre-set manifold lengths based on cam duration, RPM, etc.
    The Linkert Main Nozzle; what does it do? Why are there so many different Linkert main nozzles? Which one is best? Can the Linkert nozzle be modified?
    What's a “booster venturi”; what does it do? Will it help your Linkert?
    Tunnel-ram intake manifold; more power for Linkert single-carburetor racers with theory, calculations and dimensions, including illustrations and Tables of pre-set data.
    Tuned “Helmholtz” resonator; add an air box for power, discusses theory, calculation and dimensions, including Tables of pre-set data.
    New intake port fabrication; how to convert your side-valve cylinders or OHV 1936-47 knucklehead or 1948-65 panhead heads to dual port, alignment, size, &c. with illustrations.
    Dual 1” Linkerts; setting up a big twin dual-carburetor Linkert installation, using the common 4-bolt M-74B.
    Dual 1” Linkerts; setting up a 45 dual-carburetor Linkert installation, using the common 3-bolt M-51 or M344. Indian Chief & Scout owners: make your own “Altoona” motor!
    Linkert MR-8; making a high-flowing, adjustable “MR” replica for your knucklehead or panhead OHV stroker from an M-74B for maximum performance with old-time appearance.
    Linkert MR-9; making a high-flowing, adjustable 1¼” carburetor for your pre-1940 H-D racer or Indian Chief or Scout from the common Linkert M-51 or M344, etc. for maximum legal performance where later & larger carburetors are not permitted.
    Linkert Air Cleaner; how to modify & improve the standard Linkert “bell” air cleaner for more air flow, while retaining stock appearance.
    Velocity stacks and ram tubes; how they work, which ones are best.
    Beck Replacement Linkert Carburetors; decoding the numbers.
    Converting the Linkert to Alcohol; methanol, ethanol, etc. effects on jetting, ratios, safety, etc.
    I’ve also written booklets for British motorcycles on Amal Concentric carburetor tuning: Amal Concentric carburetor tuning, Amal Monobloc carburetor tuning: Amal Monobloc carburetor tuning and Mikuni VM carburetor tuning: Mikuni VM carburetor tuning.
    Please note: this is not a coffee table book, it is intended to be a research tool for those who seriously want to improve their Linkert carburetors. It is not a repair manual. If your bike won’t start, float bowl leaks, spark plugs foul, &c. my booklet will not help you. It does not contain information on tune-ups, or explain how to remove, disassemble, clean or restore the carburetor. If you do not already have this information do not buy this booklet. If your engine is stock and you’re pleased with how it runs now, this booklet is not going to be of much use, although you might find it interesting.


New: get this booklet plus “45 Performance” or “80 Performance”at reduced price, click here for details: Click here to purchase both books at once, and save money.

I’m the author, Jeffrey Diamond

. I’ll sign the title page of the book for you, just tell me what to say. When I’m dead it may be worth money!

Click here for a full-size view of the “The Linkert Book” book cover Click here for the mail-in foreign order form

Price: $19.95 + the actual postage. No hidden charges. I'll ship anywhere in a strong tear-proof Tyvek envelope by 1st Class Mail. Click here to order by mail:
Click here for the mail-in U.S. order form   U.S. 1st Class Mail
Click here for the mail-in foreign order form  All foreign orders 1st Class Mail Int’l.
My address is below. Sorry, I can’t take your credit card directly but PayPal can, see below. Need more than 1 copy? Subtract $3.00 from the total for each extra copy.

Use your Visa or Mastercard to pay with PayPal

New York State
(with sales tax)

1st Class Mail

U.S., other States
(including APO, FPO)

1st Class Mail


1st Class Mail International

Europe, Australia, Japan,
most other foreign countries

1st Class Mail International

New Zealand, South Asia,
Africa, South America

1st Class Mail International

Use the proper order form, and payment only as indicated:
U.S. U.S. Order Form Canadian and Foreign Foreign Order Form.
Use cash, or a postal or bank money order only, please?, and mail to:

“Victory Library”
13 Irwin Ct.
Lynbrook NY 11563-2511 U.S.A.

See these Victory Library booklets

I'm trying to locate some people I used to know; please click here for more details. Thanks!

Linkert Parts

U. S.
Order Form

Order Form

Order Form

Amazon Books


adapt, adapter, adapting, adjust, adjusting, advice, advise, air, air-flow, air flow, airflow, air-bleed, analysis, analyze, answer, antique, article, articles, bomb sight, bomb site, bombsight, bomb-sight, bombsite, bomb-site, book, booklet, booster, bowl, bronze, butterfly, calculate, calculation, cam, cams, carb, carburetor, carburettor, carby, Chief, choke, compare, comparison, comprehensive, conversion, convert, data, Diamond, discuss, dual-carb, dual carb, dual-carburetor, dual carburetor, duration, E, ejit, EL, emulsion, emulsion tube, exhaust, F, FL, flat head, flat heads, flathead, flat-head, flatheads, flat-heads, FLH, float, float bowl, float-bowl, G, GA, GE, HD, Harley, Harley Davidson, Harley-Davidson, H-D, help, history, hot cam, hotter cams, how do, how to, identify, idle, improve, improvement, including, increase, Indian, information, install, intake, J, JD, Jeffrey Diamond, jet, jetting, K, K & S, K and S, K N S, K&S, KH, KHK, KK, K-Model, KNS, knuck, knuckle, knucklehead, KR, KRTT, L & L, L&L, Langsenkamp, lean, lean out, Linkert, M, M-, M 11, M 16, M 17, M 17L, M 17R, M 18, M 2, M 21, M 25, M 31, M 31F, M 31FL, M 35, M 36, M 36A, M 4, M 41, M 41F, M 41L, M 41LF, M 45, M 45A, M 5, M 51, M 51F, M 51L, M 51LF, M 52, M 53, M 53A, M 53A1, M 54, M 54B, M 55, M 55F, M 58, M 6, M 61, M 61B, M 64, M 65, M 7, M 74, M 74B, M 75, M 8, M 84, M 88, M 90, M 97, M11, M-11, M16, M-16, M-17, M17L, M-17L, M17R, M-17R, M18, M-18, M2, M-2, M21, M-21, M25, M-25, M31, M-31, M31F, M-31F, M31FL, M-31FL, M35, M-35, M36, M-36, M36A, M-36A, M4, M-4, M41, M-41, M41F, M-41F, M41L, M-41L, M41LF, M-41LF, M45, M-45, M45A, M-45A, M5, M-5, M51, M51, M-51, M-51, M51F, M-51F, M51L, M-51L, M51LF, M-51LF, M52, M-52, M53, M-53, M53A, M-53A, M53A1, M-53A1, M54, M-54, M54B, M-54B, M55, M-55, M55F, M-55F, M58, M-58, M6, M-6, M61, M-61, M61B, M-61B, M64, M-64, M65, M-65, M7, M-7, M74, M74, M-74, M-74, M74B, M-74B, M-74B, M75, M-75, M8, M-8, M84, M-84, M88, M88, M-88, M-88, M90, M-90, M97, M-97, main discharge tube, main jet, main nozzle, manifold, model, Model M, modify, modified, MR 2, MR 3, MR 4, MR 4A, MR 4A, MR2, MR-2, MR3, MR-3, MR4, MR-4, MR4A, MR4A, MR-4A, MR-4A, needle, needle & seat, nozzle, obsolete, OHV, old, opens, over size, overlap, pan, panhead, panic, parts, performance, power, question, race, racer, racers, racing, research, restoration, restore, rich, Scout, secondary, Servicar, Servi-Car, Service Manual, shaft, side valve, sidevalve, side-valve, size, spec, specifications, specs, speed, speed equipment, spray bar, tech, technical, throttle disc, throttle shaft, tip-in, transition, trike, tune, tuner, tune-up, tuning, type, U, UH, UHS, UL, ULH, UMG, U-Series, V, vacuum, VC, venturi, VHS, Victory, vintage, VL, VLD, VLH, W, what is, WL, WLA, WLC, WLD, WLDD, WLDR, WR, 3 bolt linkert, 3-bolt linkert, 4 bolt linkert, 4-bolt linkert, jet the linkert carburetor, linkert m-16 carburetor, linkert m-21 carburetor, linkert m-25 carburetor, linkert m-340 carburetor, linkert m-35 carburetor, linkert m-36 carburetor, linkert m-36A carburetor, linkert m-41 carburetor, linkert m-45 carburetor, linkert m-45A carburetor, linkert m-51 carburetor, linkert m-51L carburetor, linkert m-53 carburetor, linkert m-53A carburetor, linkert m-641 carburetor, linkert m-741 carburetor, linkert m-88 carburetor, linkert m16 carburetor, linkert m18 carburetor, linkert m25 carburetor, linkert m340 carburetor, linkert m35 carburetor, linkert m36 carburetor, linkert m41 carburetor, linkert m45 carburetor, linkert m45A carburetor, linkert m5 carburetor, linkert m51 carburetor, linkert m51L carburetor, linkert m53 carburetor, linkert m53A carburetor, linkert m640 carburetor, linkert m74B carburetor, linkert m75 carburetor, linkert m88 carburetor, modify the linkert carburetor, tuning the linkert carburetor