"Harley-Davidson" name & logo for reference purposes only. Not affiliated with Harley-Davidson Motor Co.
by Jeffrey Diamond
IBRARY's comprehensive booklet on obtaining the best speed & performance from your Harley-Davidson 45” flathead 1937-73 solo, Servi-Car, military and civilian, including model letters WL, WLA,
WLC, G, GE, etc. Your “obsolete” 45” 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 45. 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.
IBRARY is the original
source of side-valve performance (since 1971). This material
is not reprinted from other articles, magazines, or factory literature
and is not available anywhere else. Stapled in paperback to save you printing costs, with 58 pages of text and over 33,000 words, including the following chapters, some with b&w illustrations and diagrams:
45 Power I·; the original and best idea source for speed & power from your 45 (my oldest & best known booklet,
in print since 1976 but revised and improved constantly (this is the latest version). It should be your first step
to modifying your own motor.These instructions get results, and are easy to follow; no welding or expensive &
complex machine work is needed.
45 Power II·; the next step for even more power, for fast street use or building a replica racer; explains many
techniques used by experts 50 years ago.
45 Strokers; details on installing long-stroke flywheels to build a 900cc motor, selecting components, where
clearancing is necessary, calculating skirt lengths, piston compression distances, adapting commercially-available
pistons, or constructing a “short-rod” 45 stroker motor using S&S flywheels, modified std. pistons and
Sportster rods, more.
Relieving the 45; 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 std. 45 for
Porting the 45; instructions for improving the 45’s breathing capacity, both intake and exhaust, from the valve
seats to the port opening, for all standard cylinders 1936-73.
Factory Hot Parts; the only detailed guide to H-D factory speed equipment for the 45 & K-Model motors, gives
part #s, data on original use, measurements, interchanges between models, how to identify WLD, WLDR,
WR & K/KH/KR parts such as heads, manifolds, rods, cylinders, crank-pins, cams, & cam covers by casting
numbers, dimensions, more.
Big Valves for the 45; complete instructions to easily install high-quality, inexpensive, reliable auto parts for more
top end power; diagrams show how to modify your exhaust valves for better flow, too.
45 Motor Data Chart; gives exact dimensions and running clearances, etc.
45 Bore & Stroke Chart; gives engine size for all bore oversizes & stroker flywheels.
45 Sprocket Ratio Chart; gives ratio and speed for all motor sprockets.
45 Transmission Ratio Charts; give ratios and RPM loss, as well as tooth counts etc. for pre-war and late std.,
special & WR close-ratio transmissions.
45 Racing Specs Chart; clearances, end-play, settings, dimensions, etc. for high-performance engine assembly of 1937-73 standard motors.
Service Tips; many useful shop short-cuts and hints.
Good Numbers?; some ideas on decoding VIN numbers, detecting alterations etc.
Z Rotor; a simple breather timing modification.
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 45 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.
Looking for do-it-yourself information on 1937-48 Harley-Davidson UL 74 & 80” flathead engines? Click here: .
Click here to buy “45 Performance” plus the “Linkert Book” and save money: .
Payment & shipping instructions: please read carefully! No hidden handling charges. I'll ship anywhere. Two forms of shipment are available: a strong tear-proof
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$23.49 (envelope) or $29.50 (box).
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$27.55 (envelope) or $34.25 (box).
All other foreign countries, including Australia, Japan, Europe 1st Class Mail (airmail) Int’l.:
$27.86 (envelope) or $34.85 (box).
Dealers & shops: 10% discount for 5 copies, 25% for 10 copies.
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