We use cookies for analytics, advertising and to improve our site. To find out more see our privacy policy.
>
Shop
>
Engine
>
Lower End
>
Flywheels
>
Truett & Osborn Flywheels

Truett & Osborn Flywheels

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), with the same weight and resulting torque.

An exception are the flywheels for Evolution Big Twins. They come as Torque Monster flywheels, i.e. unlike stock they feature a thicker left wheel for more lower end 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.

  • steel
  • USA
Item №
Version
net price*
unit
Availability in warehouse Germany
Truett & Osborn Flywheels
63-752
fits J/F models 1915-1929; 61"/1000cc; Ø 8-3/4”; stroke: 3-1/2 ”
$822.47
set
Go to article
Truett & Osborn Flywheels
63-728
fits JD/FD models 1921-1929; 74"/1200cc; Ø 8-3/4”; stroke: 3-31/32 ”
$822.47
set
Go to article
Truett & Osborn Flywheels
63-724
fits JD/FD models 1921-1929; 74"/1200cc; Ø 8-3/4”; stroke: 4 ”
$822.47
set
Go to article
Truett & Osborn Flywheels
63-725
fits Big Twin Flathead 1937-1948; 74"/1200cc & 80”/1300cc; Ø 8-9/32”; stroke: 4-9/32 ”; replaces OEM 340-37, and 341-37; NOTE: Must be assembled with 1941→ OHV crank pin
$822.47
set
Go to article
Truett & Osborn Flywheels
63-754
fits Knucklehead 1936-1940; 61”/1000 cc; Ø 8-1/8”; stroke: 3-1/2 ”; replaces OEM 338-36, and 339-36; NOTE: Must be assembled with 1941→ OHV crank pin
$822.47
set
Go to article
Truett & Osborn Flywheels
63-729
fits Knucklehead and Panhead 1941-1954; 61”/1000 cc; Ø 8-1/2”; stroke: 3-1/2 ”; replaces OEM 23922-41, 23942-41, 338-41, and 339-41; NOTE: Must be assembled with 1941→ OHV crank pin
$822.47
set
Go to article
Truett & Osborn Flywheels
63-726
fits Knucklehead and Panhead 1941-1954; 74"/1200cc ; Ø 8-1/2”; stroke: 3-31/32 ”; replaces OEM 338-37, 339-37, 23919-41, and 23940-41
$822.47
set
Go to article
Truett & Osborn Flywheels
63-727
fits Panhead and Shovelhead 1956-1969; 74"/1200cc ; Ø 8-1/2”; stroke: 3-31/32 ”; replaces OEM 23940-41, 23919-56, and 23919-65
$822.47
set
Go to article
Truett & Osborn Flywheels
63-757
fits Shovelhead 1972-1981; 74"/1200cc ; Ø 8-1/2”; stroke: 3-31/32 ”; replaces OEM 23919-72, and 23940-41A; NOTE: Must be assembled with 1982→ sprocket shaft. Can be used →1984 with → early 1981 crank pin.
$822.47
set
Go to article
Truett & Osborn Flywheels
63-755
fits Shovelhead 1972-1981; 80”/1340 cc; Ø 8-1/2”; stroke: 4-1/4 ”; replaces OEM 23922-78, and 23924-78; NOTE: Must be assembled with 1982→ sprocket shaft. Can be used →1984 with → early 1981 crank pin.
$822.47
set
Go to article
Truett & Osborn Flywheels
63-756
fits Evolution Big Twins 1985-1999 ; 80”/1340 cc; Ø 8-1/2”; stroke: 4-1/4 ”
$822.47
set
Go to article
* United States of America: Tax free shipping. Please check your local import fees.

See also:

Have any questions?

Our service team will be glad to help out: Mondays - Thursdays 09:00-16:00 CET, Fridays 08:00-16:00 CET, Phone: +49 / 931 250 61 16, eMail: service@wwag.com