Truett & Osborn Flywheels
Select variant:
fits Big Twin Flathead 1937-1948; 74"/1200cc & 80”/1300cc; Ø 8-9/32”; stroke: 4-9/32 ”; replaces OEM HD 340-37, and 341-37; NOTE: Must be assembled with 1941→ 74” OHV crank pin
fits J/F models 1915-1929; 61"/1000cc; Ø 8-3/4”; stroke: 3-1/2 ”
fits JD/FD models 1921-1929; 74"/1200cc; Ø 8-3/4”; stroke: 3-31/32 ”
fits JD/FD models 1921-1929; 74"/1200cc; Ø 8-3/4”; stroke: 4 ”
fits W, WR, WLDR and G models 1937-1973; 45”/750 cc ; Ø 7-7/8”; stroke: 3-13/16 ”; replaces OEM HD 338-32, 339-37, 23916-32, and 23936-37
fits V series models 1930-1936; 74"/1200cc; Ø 8-1/8”; stroke: 4 ”; replaces OEM HD 340-30A, and 341-30A
fits V series models 1930-1936; 80”/1300cc; Ø 8-1/8”; stroke: 4-1/4 ”
fits Knucklehead 1936-1940; 61”/1000 cc; Ø 8-1/8”; stroke: 3-1/2 ”; replaces OEM HD 338-36, and 339-36; NOTE: Must be assembled with 1941→ 74” OHV crank pin
fits Knucklehead and Panhead 1941-1954; 61”/1000 cc; Ø 8-1/2”; stroke: 3-1/2 ”; replaces OEM HD 23922-41, 23942-41, 338-41, and 339-41; NOTE: Must be assembled with 1941→ 74” OHV crank pin
fits Knucklehead and Panhead 1941-1954; 74"/1200cc ; Ø 8-1/2”; stroke: 3-31/32 ”; replaces OEM HD 338-37, 339-37, 23919-41, and 23940-41
fits Panhead and Shovelhead 1956-1969; 74"/1200cc ; Ø 8-1/2”; stroke: 3-31/32 ”; replaces OEM HD 23940-41, 23919-56, and 23919-65
fits Shovelhead 1972-1981; 74"/1200cc ; Ø 8-1/2”; stroke: 3-31/32 ”; replaces OEM HD 23919-72, and 23940-41A; NOTE: Must be assembled with 1982→ sprocket shaft. Can be used →1984 with → early 1981 crank pin.
fits Shovelhead 1972-1981; 80”/1340 cc; Ø 8-1/2”; stroke: 4-1/4 ”; replaces OEM HD 23922-78, and 23924-78; NOTE: Must be assembled with 1982→ sprocket shaft. Can be used →1984 with → early 1981 crank pin.
fits Evolution Big Twins 1985-1999 ; 80”/1340 cc; Ø 8-1/2”; stroke: 4-1/4 ”
Price and stock:
Item №
63-725
Price incl. VAT
1,156.48 €
Available
3
Ready for immediate delivery from our Würzburg, Germany warehouse
The price includes 184.65 € German VAT.
- Flywheels by Truett & Osborn
- fits Big Twin Flathead 1937-1948
- 74"/1200cc & 80”/1300cc
- steel
- Ø 8-9/32”
- stroke: 4-9/32 ”
- replaces Harley-Davidson part number HD 340-37, and 341-37
- USA
- NOTE: Must be assembled with 1941→ 74” OHV crank pin
- gross weight: 13.5 kg
Worn flywheels are a major obstacle during the rebuild of an engine, mostly with big expenses required to put them back into service. In such a case it is often more economic and safer to go for a new set. The Truett & Osborn flywheels offered here are manufactured from 80-55-06 ductile iron blanks, which are then heat treated. 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.
They are made just like the stock counterparts, i.e. the left wheel is thicker than the right one (exc. JD and 45”), with the same weight and resulting torque.
All versions are unbalanced and require adaption to the respective lower end components. All T&O flywheels feature pre-installed and replaceable connecting rod thrust washers, providing increased service-life and restorability.
Accessories:
60-430
Sprocket shaft by Jims; fits SV + OHV Big Twin 1930-1954; steel, thread sprocket nut: 11/16”-18; thread shaft nut (flywheel side): 3/4"-18; replaces OEM HD 24001-30; gross weight: 400 g
60-460
Pinion shaft »Standard«; fits 74”+80” Big Twin Flathead 1937-1948; steel; replaces OEM HD 24006-37; gross weight: 350 g
Crank Pins - for 74” and 80” OHV Big Twins 1941-1981
See also:
Cannonball Knucklehead Crankcases
Reproduction crankcases which meet or exceed highest restoration demands. Cast from state-of-the-art materials and machined on CNC equipment for strength and precise fitment. Intended to work with stock or identically constructed engine components. Finished and detailed like the original counterparts so these cases will smoothly blend into your old mill to give it a new life. For ease of installation both case halves are carefully matched and feature pre-installed case bushings, which are line bored and lapped for standard rollers. Cam bushings are already in place and reamed. (For exact measures pls see facts)....
Cannonball Panhead Crankcases
Reproduction crankcases which meet or exceed highest restoration demands. Cast from state-of-the-art materials and machined on CNC equipment for strength and precise fitment. Intended to work with stock or identically constructed engine components. Finished and detailed like the original counterparts so these cases will smoothly blend into your old mill to give it a new life. For ease of installation both case halves are carefully matched and feature pre-installed case bushings, which are line bored and lapped for standard rollers. Cam bushings are already in place and reamed. (For exact measures pls see facts)....
Cannonball Big Twin Flathead Crankcases
Reproduction crankcases which meet or exceed highest restoration demands. Cast from state-of-the-art materials and machined on CNC equipment for strength and precise fitment. Intended to work with stock or identically constructed engine components. Finished and detailed like the original counterparts so these cases will smoothly blend into your old mill to give it a new life. For ease of installation both case halves are carefully matched and feature pre-installed case bushings, which are line bored and lapped for standard rollers. Cam bushings are already in place and reamed. (For exact measures pls see facts)....
IC Flywheel Assembly Jigs
Top-quality Harley flywheel rebuilding jig. The heavy-duty baseplate can be fixed in a vise and holds the flywheels with two studs for loosening or tightening the shaft and crank pin nuts. The jaws simplify pre-adjustment and alignment of flywheels before the final centering on the truing stand.
Jims Flywheel Sockets
These sockets are machined of heat treated tool steel. With a low profile, all sockets are just long enough to give 100% nut to socket and 100% drive end contact. Machined flat at the nut receiving end to eliminate rounding off the nut.
Have any questions?
Our service team will be glad to help out: Mondays - Thursdays 08:00-17:00 CET, Fridays 08:00-16:00 CET, Phone: +49 / 931 250 61 16, eMail: service@wwag.com