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This is a brand-new quality product made in America by the famous “Truett & Osborn” company for all Harley-Davidson 45” motors 1937-73, for street or racing use.
Why waste your time trying to find a set of good used flywheels for your basket-case project, or re-truing that old set you already have - which may never true up accurately? Is that old set still safe to use in vintage racing? Instead, start with brand-new parts even better than NOS originals. This is exactly what you need as the foundation for your high-performance but stock stroke 45 WR or replica motor for AHRMA, &c. racing. The stroke length is the original at 3-13/16” (3.8125”). |
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How is this different from our current flywheel? It uses the much larger ironhead Sportster 1¼” crankpin, bearings and connecting rod set (rather than the original 45 rod assembly). Sportster rods from any KH, 900cc or 1000cc engine 1954-81 will fit. These are also available in alternate lengths for the advanced engine builder (please note that these do not change the stroke length or engine size):
» 6.926” (1983-84 XR1000, 1986-* Evo Sportster
» 7.113” (S&S special set)
» 7.270” (Buell XB9)
» 7.4375” (stock 1954-81, same as the 45)
» 8.00” (Carrillo)
The photo shows the actual flywheels (the crank-pin & nuts shown are not included); click the picture for a larger view. |
These flywheels are a direct replacement (except for the rod set) for the original flywheels in all 45 motors with the serial letters W, WL, WLA, WLC, WLD, WLDR, WR, G, GE & GA. They use all std. 45 lower-end components, including your own sprocket and pinion shafts, bearings, etc. plus any 1954-81 Sportster rod set (factory, aftermarket or S&S). 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.
Knife-edge profile
These flywheels are also available with “knife-edge” contour profiled weight reduction (at extra cost). The greatly improves throttle response, at the expense of reduced low-speed lugging ability, etc. The flywheel diameter is not reduced, so your existing scraper still functions. Balancing will be slightly more difficult. Please e-mail for details: “knife-edge(at)victorylibrary.com”.
This is more complex than a normal rebuild, requiring prior experience and other assembly work. Victory does not supply pistons, modify pistons, or install these parts. Flywheels must be balanced to your components. |
VICTORY is the original source of side-valve performance since 1971. Click here for a brief bio on the author: .
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Price: $335.00 + postage, insurance, handling & customs fees.
Payment & shipping instructions: please read carefully, and be sure to read Terms at the bottom of these instructions.
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. From time to time, some individual flywheel sets are slightly too heavy for a single box and must be shipped in 2 separate boxes. I won't know this until the box is weighed. If it's too heavy, I will request the additional postage. |
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. All payments must be in US dollars, payable to Victory Library.
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Buy 45 Stroker Flywheels with PayPal
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U.S.A. | Canada | All other foreign |
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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. | |
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U.S. customers: please use cash, or a postal or bank money order only (no personal or business checks). Price: $346.65, including postage, insurance & handling.
Canadian customers: please use cash (no checks, please; checks will be destroyed since it costs several dollars to return them). Important: you must include your local telephone number for our customs declaration. Price: $418.09, including postage, insurance, handling & customs fees.
All other foreign customers: please use cash (no checks, please; checks will be destroyed since it costs several dollars to return them). Important: you must include your local telephone number for our customs declaration. Price: $439.98, including postage, insurance, handling & customs fees.
Do not request return receipt or confirmation - this will delay your order by 1 week. Do not use registered mail or any other method which requires a signature causing me to waste an hour waiting at the Post Office. |
Victory Library
Post Office Box 133
West Hempstead, NY 11552-0133
U.S.A. |
Click here for other Harley-Davidson stroker
flywheels |
Knuckle, Panhead 1941-54 |
Pan, Shovelhead 1956-71 |
Shovelhead, Evo
1981-* |
Sportster 1957-* |
45 WL, trike 1937-73 |
74, 80 Flathead 1937-48 |
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See these Victory Library booklets |

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Terms: the product being sold pursuant to the instructions listed above, and safe delivery of same to the buyer, are warranteed only by the manufacturer and the carrier, respectively, and are not warranteed by Victory, Jeffrey Diamond, or any person acting on their behalf. All sales are final unless the product is not as described. Any claim for loss, damage, or defective product must be made against the carrier or the manufacturer, respectively. By purchasing this product you agree to these terms, and to hold Victory, Jeffrey Diamond, or any person acting on their behalf harmless from any claim, direct or indirect, arising from this transaction or any subsequent transaction, and to seek satisfaction solely and exclusively from the manufacturer and/or carrier. If these terms are not
acceptable to you, please do not purchase. If you have a question, or
require additional explanation of these terms, please e-mail before
purchasing. |
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