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Truett & Osborn Stroker Flywheels for OHV Big Twins

Truett & Osborn Stroker Flywheels for OHV Big Twins

Price and stock:
Item №
63-747
net price
$1,068.65
Available
1
Ready for immediate delivery from our Würzburg, Germany warehouse
* Tax free shipping.
set
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  • Flywheels »Torque Monster« by Truett & Osborn
  • fits Big Twins 1941-1954
  • use with 1941-1981 crank pin
  • steel
  • Ø 8-1/2”
  • stroke: 4-1/2 ”
  • 1380 cm³
  • USA
  • gross weight: 14.51 kg

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 (=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.

Accessories:

60-610

60-610

Connecting rod kit by S&S; fits OHV Big Twin 1941- early 1981; steel; gross weight: 2.2 kg
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Cannonball Knucklehead Crankcases

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)....
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Cannonball Panhead Crankcases

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)....
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Pinion Shafts - for OHV Big Twin 1939 -1953

Pinion Shafts - for OHV Big Twin 1939 -1953

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Sprocket Shafts - for Big Twin 1930-1954

Sprocket Shafts - for Big Twin 1930-1954

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S&S Stock Bore Stroker Pistons — Knucklehead, Panhead, Shovelhead

S&S Stock Bore Stroker Pistons — Knucklehead, Panhead, Shovelhead

Pistons for Stroker motors. Each kit includes two pistons for front and rear cylinder, including piston rings, pins and clips. Standard size is for the 3-7/16” bore of 74” (=1200 ccm) cylinders. For 80” (=1340 ccm) cylinders 3-7/16” + .060 would be standard size.
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See also:

Flywheel Truing Stand

Flywheel Truing Stand

Heavy Duty stand in professional quality for truing and balancing HD flywheel assemblies. Other makes are possible as long as they feature a similar design. The stand holds the respective flywheels between two centers and by means of adjustable indicator pointers you can true the flywheels to an accuracy of .002”. The centers are adjustable by 6” on the wheel side and by 10” on the opposite side. Another feature are the two double rollers on which you can balance individual flywheels. This requires balancing shafts, which are not included.
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IC Flywheel Assembly Jigs

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.
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Thor Soft Hammers

Thor Soft Hammers

When loosening or tighteneing larger sized nuts and bolts a few hammer strikes often do the trick. Putting a cover into place also becomes alot easier when you can assist with a few soft blows. But please, do not use your trusted steel sledge for these jobs and spare the nice and smooth surfaces of your expensive spanners and covers. The copper and rawhide faced Thor hammers provide a safer alternative to striking with conventional steel hammers. The resilient soft striking faces shape themselves to the part being struck. Acting as shock absorbers, they spread the force of the blow uniformly, minimising inefficient rebound and damage to components. Soft-faced hammers also reduce noise pollution in the workplace. The faces are designed to wear and can be replaced. Handles are made from ash wood. Available in various "weight categories", with the 2380 g version being a perfect helper when truing flywheels, too.
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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