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IBRARY’s comprehensive booklet on obtaining the best speed & performance from your Harley-Davidson 74 & 80” flathead 1937-48, including model letters U, UL, UH, ULH, UA, UMG, etc.
    “80 Performance” is included in “The 80 Book”: , but does not include any 45, Linkert, Mikuni, 45 Magnum or British transmission information, please order these separately: .
    Your “obsolete” 80” side-valve is capable of surprising speed & power, without loss of original appearance or reliability. Over 30 years of research and experience has gone into this booklet. It's the original, best, and most complete do-it-yourself literature you can buy to get the most from your Harley-Davidson UL. Before making any decisions about modifying (or even rebuilding) your motor, get the best help available, and do it right the first time. This book is not a repair manual, but 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 many improvements you can make yourself with common hand tools.
    

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IBRARY is the original source of side-valve performance (since 1971). Click here for a brief bio on the author: . This information is not reprinted from other articles, magazines, or H-D factory literature and is not available anywhere else.
    I guarantee that you’ll find information in this booklet you’ve never seen before, and that will help you plan and complete your 80 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 will invest in the motor - plan more intelligently, and get better results.
    Stapled in paperback to save you printing costs, includes the following chapters, some with black & white illustrations, diagrams and charts:

80 Power I·; the original and best idea source for speed & power from your UL (in print since 1984). It should be your first step to modifying your own motor. These instructions get immediate results, and are easy to follow; no welding or expensive & complex machine work is needed.
80 Power II·; the next step for even more power, for fast street use; explains many techniques used by experts 50 years ago.
80 Strokers; details on installing long-stroke flywheels, selecting components, where clearancing is necessary, calculating skirt lengths, piston compression distances, ideas on adapting commercially- available pistons, using S&S or Truett & Osborn flywheels, much more. I wrote the original “Easyriders” magazine article on this subject in 1978!
Relieving the 80; a general discussion of relieving the cylinders & heads for better flow and more effective combustion, plus detailed specific instructions to help you plan & complete reliefs on your UL for better performance.
Porting the 80; instructions for improving the UL's breathing capacity, both intake and exhaust, from the valve seats to the port opening, for all cylinders 1936-48.
80 Hot Parts; the only detailed guide to speed equipment for the U-Series motors, gives part #s, data on original use, measurements, interchanges between models, how to identify parts such as heads, manifolds, cylinders, rods, crank-pins, cams, & cam covers by casting numbers, dimensions, much more.
80 Racing Specs; clearances, end-play, settings, dimensions, etc. for high-performance engine assembly of 1937-48 motors.     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 UL engines. 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 bike. 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.

Price: $19.95 + postage. No hidden charges. I'll ship anywhere. Two forms of shipment are available: a strong tear-proof Tyvek envelope (least expensive), or a corrugated cardboard box (strongest). Total prices including postage and applicable sales tax are:

New York 1st Class Mail: $22.27 (env.) or $23.61 (box) + NY sales
            tax at your local rate; or add 8-3/4 % to the total including postage.
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  Canada 1st Class Mail Int’l.: $23.00 (env.) or $24.71 (box).
  All other foreign 1st Class Mail Int’l.: $26.75 (env.) or $29.75 (box).

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