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