This is a brand-new quality product made in America by the famous “Truett & Osborn” company for all Harley-Davidson 74” F-Series motors with Timken bearing (not roller) sprocket shafts 1956-71 including 1956-65 panhead, 1966-69 generator shovelhead and 1970-71 alternator shovelhead for street or racing use. This is exactly what you need as the foundation for your high-performance motor. Click the picture for a larger view.

    These flywheels can also be installed in the later 1972-early 1981 alternator engines by using a 24001-70 sprocket shaft (which has the correct taper for these flywheels, and fits the 1970-* alternator engines for length and spline), and the correct pinion shaft for your own engine (1972: 24006-58; 1973-81: 24006-73).
    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: .
    Important: for TorqueMonsters I must know the year of the crankcases you are using: generator (1955-69) or alternator (1970-71).     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.
    This is not a radical, dangerous and short-lived modification, panhead stroker motors have been built for over 40 years. The motor will not explode, overheat 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). Starting will be more difficult.     The flywheels are 4-3/4” (4.75” stroke = 88”) stroke, are furnished in the original 8.50” outside diameter which will safely clear the case scraper in all motors, and are a direct replacement (except for stroke length and weight) for the original flywheels in these motors. This stroke length is considered the limit of practicality for street use.     These flywheels use all std. 74” F-Series lower-end components, including your own rod set, shafts, bearings, etc. 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.     Warning: 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.
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    Payment & shipping instructions: please read carefully, and be sure to read Terms at the bottom of these instructions. Delivery to U.S. and specific foreign addresses only, sorry.
    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. The prices shown below 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. Important: you must include your local telephone number on all foreign orders for our customs declaration. Important: all postal charges were increased May 14, and the prices and tables below do not yet have the corrections. If your payment is not sufficient you will ne notified or receive a PayPal request for the correct amount. This inconvenience will be corrected as quickly as possible.