These are brand-new quality products made in America by the famous “Truett & Osborn” company for Harley-Davidson motors. This is exactly what you need as the foundation for your high-performance motor.
    Nothing adds torque like stroker flywheels! Gives you the power for high cruising speed, and better acceleration, also increases compression.
    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, stroker motors have been built for over 60 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).
    These flywheels use all std. 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.

Indian Scout

57” Stroker Flywheel set; 4-7/16" (requires Sportster crank-pin & rod set). Click for details:

1937-48 U, UL, UH, ULH &c.

Requires 1¼” crank-pin. Also available in TorqueMonster.

84” Stroker Flywheel set; 4-1/2”. Click for details:

86” Stroker Flywheel set; 4-5/8”. Click for details.

88” Stroker Flywheel set; 4-3/4”. Click for details:

92” Stroker Flywheel set; 5”. Click for details:

1937-73 45 WL, WLA, G, &c.

Stroker Piston; pair, only for stroker flywheels. Click for details:

Replacement Flywheel set, 3-13/16" (standard). Click for details:

861cc Stroker Flywheel set, 4-7/16” (52.5”). Click for details:

873cc Stroker Flywheel set, 4-1/2” (53.3”). Click for details:

897cc Stroker Flywheel set, 4-5/8” (54.7”). Click for details:

1957-85 Ironhead & 1986-* Evo Sportster and 1952-56 K & KH

4-1/2” Stroker Flywheel set. Click for details:

4-5/8” Stroker Flywheel set. Click for details:

4-3/4” Stroker Flywheel set. Click for details:

1941-47 knucklehead & 1948-54 panhead

Also available in TorqueMonster.

80” Stroker Flywheel set; 4¼” stroke. Click for details:

82” Stroker Flywheel set; 4-3/8;” stroke. Click for details:

84” Stroker Flywheel set; 4½” stroke. Click for details:

86” Stroker Flywheel set; 4-5/8” stroke. Click for details:

88” Stroker Flywheel set; 4-3/4” stroke. Click for details:

1956-65 panhead, 1966-69 generator & 1971-72 alternator (“cone”) shovelheads

Also available in TorqueMonster.

80” Stroker Flywheel set; 4¼” stroke. Click for details:

82” Stroker Flywheel set; 4-3/8” stroke. Click for details:

84” Stroker Flywheel set; 4½” stroke. Click for details:

86” Stroker Flywheel set; 4-5/8” stroke. Click for details:

88” Stroker Flywheel set; 4-3/4” stroke. Click for details:

1972-81 alternator (“cone”) shovelhead

Requires the 1981-* shafts and minor small parts. Also available in TorqueMonster.

82” stroker or replacement Flywheel set; 4¼” stroke. Click for details:

86” Stroker Flywheel set; 4½” stroke. Click for details:

89” Stroker Flywheel set; 4-5/8” stroke. Click for details:

91” Stroker Flywheel set; 4¾” stroke. Click for details:

1981-88 alternator (“cone”) shovelhead & Evo

Also available in TorqueMonster.

82” Stroker Flywheel set or replacement; 4¼” stroke replacement flywheels. Click for details:

86” Stroker Flywheel set; 4½” stroke. Click for details:

89” Stroker Flywheel set; 4-5/8” stroke. Click for details:

91” Stroker Flywheel set; 4¾” stroke. Click for details:

1989-* Evo

Requires the 1981-* shafts and minor small parts. Also available in TorqueMonster.

82” Stroker Flywheel set or replacement; 4¼” stroke replacement flywheels. Click for details:

86” Stroker Flywheel set; 4½" stroke. Click for details:

89” Stroker Flywheel set; 4-5/8" stroke. Click for details:

91” Stroker Flywheel set; 4¾" stroke. Click for details: