This is a brand-new quality product made in America by the famous “Truett & Osborn” company for all Harley- Davidson U-Series motors 1937-48, for street or racing use. This is exactly what you need as the foundation for your high-performance 80 flathead motor.
    Looking for other stroker flywheels? Click here: .
    Nothing adds torque like stroker flywheels! Gives you the power for high cruising speed, and better acceleration, also increases compression. The flywheels are lighter than stock, which also helps throttle response and acceleration.

    These flywheels can also be ordered in the famous “

” heavyweight variety with about 4 lbs. more weight at $55.00 extra cost. In absolute terms, acceleration will be slower with heavier flywheels, most noticeable in 1st gear. Desite the name, they do not produce extra torque, they store extra torque. However, they do make starting and riding at low speeds easier, improve idle quality, and require less concentration for clutch operation, especially with large engine and transmission sprockets and heavy bikes. Read more about inertia here: .     This is a very reasonable investment - it’s only a small part of your total motor cost, and does more in one step than anything else - more than hot cams, bigger carburetor, etc., although those parts will work even better on your stroker motor.
    Please note: I am the originator of the 88” UL stroker motor (as first described in the article I wrote for “Easyriders Magazine” in 1978). This is not a radical, dangerous and short-lived modification, UL stroker motors have been built for over 20 years. The motor will not explode, overheat, be difficult to start, or wear out immediately (the extra piston travel does shorten the time between top end rebuilds slightly, but we’re talking about years, not months).     The flywheels are 4-5/8 (4.625”; 86”) stroke and are a direct replacement (except for stroke length, the larger FL crank-pin, and the flywheel weight) for the original flywheels in all motors with the serial letters U, UL, UH, ULH, UA, US, UMG, etc. The flywheels are furnished in 8-1/4” (8.25”) outside diameter, which will safely clear the case scraper in all 1937-48 U-Series motors.     These flywheels use all std. U-Series lower-end components, including your own rod set, shafts, bearings, etc. except for the common 1941-81 OHV big twin 1¼” crank-pin (not included). No special parts (other than pistons) are required for installation, and no welding or expensive machine work; this means that your project is less expensive.
    The flywheel material is far superior to the original factory cast-iron. Every individually crafted flywheel begins as a 80-55-06 ductile (nodular) iron blank, which is then heat-treated to 220-250 BHN. The 80,000 pound tensile strength blanks undergo an exacting 20-step manufacturing process, utilizing both CNC and conventional precision milling and machining. This insures accurate surfaces, legendary reliability, and excellent “truability”, an absolute necessity when setting up high performance motors to blueprint specifications. If properly installed and maintained, they will not wear out, but give many years of trouble-free service.
    Ductile cast-iron is the superior material for flywheels, since its surface provides a better “grip” on the crankpin and shaft tapers than a steel forging to prevent slippage. Cast-iron also damps out internal vibrations better than steel.
    Yes, these are the same flywheels you have heard and read about. Why should you buy these flywheels from me, instead of somewhere else? Because I’m providing you with something extra that no one else does: a 15 page comprehensive booklet is included with diagrams and dimensions to show you how to do this yourself, and containing lots of useful information to help “talk you through” the process of installing them; other modifications are required.

    There are no commercially-available pistons - they must be custom-made or adapted. Victory does not supply pistons, modify pistons, or install these parts.
    This is more complex than a normal rebuild, requiring prior experience and other assembly work. Flywheels must be balanced to your components.

V

ICTORY is the original source of side-valve performance since 1971.
Click here for a brief bio on the author: .

    Payment & shipping instructions: please read carefully, and be sure to read Terms at the bottom of these instructions. The prices shown in red are the total including postage, insurance and handling. Note: in some cases the foreign postage will be slightly less, which will be refunded.

Country

Price, std. weight

Price,

TorqueMonster

U.S.A. (49 states, except New York)

$ 308.90

$ 363.90

New York State (incl. 8.75% sales tax)

$ 335.93

$ 395.74

Canada

$ 372.87

$ 427.87

All other foreign orders

$ 441.55

$ 496.55

    The flywheels will be promptly shipped to your address in a strong box to insure safe delivery direct from the U.S. manufacturer to save you freight. You pay only the total price shown.
    There may (rarely) be a brief delay in shipment depending on production volume, you will be immediately notified if this occurs and offered a choice of waiting, an alternate stroke length, or a full refund.
    My address is below. Sorry, I can't take your credit card directly, read below. All payments must be in US dollars, payable to Victory Library. Important: you must include your local telephone number on all foreign orders for our customs declaration.

Buy UL Stroker Flywheels with PayPal

All payments must be in US dollars

U.S.A.

Canada

All other foreign

U.S.A.

Canada

All other foreign

Standard Weight Stroker Flywheels

“

TorqueMonster

” Stroker Flywheels

    Due to the high fee that PayPal charges me, a service charge is included in this purchase. This is less than it costs me to collect this money, and more convenient than your bank. If this is not convenient, use your local postal or bank money order.

If you prefer, use a postal or bank money order only (no personal or business checks), and mail to:

Victory Library
Post Office Box 133
West Hempstead, NY 11552-0133
U.S.A.

Please include your e-mail address.