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Truett & Osborn Stroker Flywheels for OHV Big Twins

Truett & Osborn Stroker Flywheels for OHV Big Twins

Of all measures to increase horsepower and torque of your factory engine, stroker flywheels are among the most effective. Boost your stock displacement 61” or 74” Knucklehead, Panhead or Shovelhead up to 84 cui or 1380cc (@ 3-7/16” bore) and experience arm stretching performance and a significantly increased fun factor.

Especially with original engine cases these 4.5” stroker flywheels are the way to go. If any, they require only minor modifications for installation and unlike with machining for Big Bore cylinders cases become not weakened. Consequently, engine life expectancy is near stock.

All versions are of Torque Monster type with thick left flywheel as original and require special stroker pistons, which are also available.

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. With pre-installed and replaceable connecting rod thrust washers, providing increased service-life and restorability.

Recommended for qualified mechanics only, because the flywheels need to be balanced and clearances in engine cases need to be checked.
  • steel
  • Ø 8-1/2”
  • stroke: 4-1/2 ”
  • 1380 cm³
  • USA
Item №
Version
net price*
unit
Availability in warehouse Germany
Truett & Osborn Stroker Flywheels for OHV Big Twins
63-747
fits Knucklehead and Panhead 1941-1954
$837.56
set
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Truett & Osborn Stroker Flywheels for OHV Big Twins
63-748
fits Panhead and Shovelhead 1955-1969
$837.56
set
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Truett & Osborn Stroker Flywheels for OHV Big Twins
63-749
fits Shovelhead 1970-1981
$837.56
set
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* United States of America: Tax free shipping. Please check your local import fees.

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