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Thanks to
Siebenthaler
Creative Services for these flyers.
Truett & Osborn Flywheels
We also offer complete crankshaft assemblies
Standard
Weight Torquemonster
 $285.00 $335.00 
Please Note: JD flywheels and 45XL flywheels are
specialty flywheels, priced the same as Torquemonster Flywheels. HD45 flywheels, K-Model flywheels, & Sportster flywheels are priced the same as
Standard Weight Flywheels.
|
YEARS
|
MODEL
|
STROKE
|
O.D.
|
NOTES
|
TorqueMonster/Specialty
|
STD. Weight
|
|
1929-1973 |
45” Forty-Five |
3 13/16 |
7 7/8 |
|
|
HD45 STK |
|
1929-1973 |
Special 45" |
3 13/16 |
7 7/8 |
Uses Sportster C-pin/Rods |
45XL STK |
|
|
|
|
|
|
|
|
|
|
1952-1953 |
K-model |
3 13/16 |
7 7/8 |
Press in shafts & C-pin |
|
52K STK |
|
1954-1956 |
KH-model |
4 9/16 |
7 7/8 |
Has lip on sprocket hole |
|
54KH STK |
|
|
|
1958-1970 |
XLR-model |
3 13/16 |
7 7/8 |
|
|
XLR STK |
|
1957-E1981 |
Sportster |
3 13/16 |
7 7/8 |
|
|
EXL STK |
|
L1981-1985 |
Sportster |
3 13/16 |
7 7/8 |
|
|
LXL STK |
|
|
|
1915-1920 |
61” J models |
3 1/2 |
8 3/4 |
|
J STK |
|
|
1921-1929 |
74” JD models |
3 31/32 |
8 3/4 |
|
JD STK |
|
|
|
|
1930-1936 |
74” Flatheads |
3 31/32 |
8 1/8 |
|
30T STK |
|
|
1937-1948 |
74”/80” Flatheads |
4 9/32 |
8 9/32 |
Uses 1941-later C-pin |
37T STK |
|
|
|
|
1936-1940 |
61” Knucklehead |
3 ½ |
8 1/8 |
Uses 1941-later C-pin |
36T 3 ½ |
|
|
1941-1947 |
61” Knucklehead |
3 ½ |
8 ½ |
|
39T 3 ½ |
|
|
1948-1952 |
61” Panhead |
3 ½ |
8 ½ |
|
39T 3 ½ |
|
|
|
|
1941-1954 |
74” Pan/Knuckle |
3 31/32 |
8 ½ |
|
39T STK |
39 STK |
|
1955 |
74" Panhead |
3 31/32 |
8 ½ |
*Use -56 Sprocket Shaft |
56T STK |
56 STK |
|
1956-1969 |
74” Pan/Shovel |
3 31/32 |
8 ½ |
|
56T STK |
56 STK |
|
1970-1971 |
74” Shovelhead |
3 31/32 |
8 ½ |
|
70T STK |
56 STK |
|
1972-1981 |
74” Shovelhead |
3 31/32 |
8 ½ |
82-later Sprocket Shaft |
82/72T STK |
82/72 STK |
|
1972-1981 |
80” Shovelhead |
4 ¼ |
8 ½ |
82-later Sprocket Shaft |
82/72T 4 ¼ |
82/72 4 ¼ |
|
1982-1984 |
80” Shovelhead |
4 ¼ |
8 ½ |
|
82T 4 ¼ |
82 4 ¼ |
|
1985-1999 |
80” Evolution |
4 ¼ |
8 ½ |
|
82T 4 ¼ |
82 4 ¼ |
Flywheels for 74" & 80" OHV models are available in Standard
Weight or Torquemonster version.
Flywheels for 61" OHV & Big Twin Flathead models are only
available in Torquemonster version.
Flywheels for 45" Flathead, K-model, Sportster, and JD models
only available in Standard Weight.
|
Sizes in Stock |
3 1/2" |
3-13/16" |
3-31/32" |
4-1/4" |
4 9/32" |
4-7/16" |
4 9/16" |
4-1/2" |
4-5/8" |
4-3/4" |
5" |
| HD45 |
|
x |
|
|
|
x |
|
x |
x |
|
|
| 45XL (XL C-pin) |
|
x |
|
|
|
x |
|
x |
x |
|
|
| 52K |
|
x |
|
|
|
|
|
|
|
|
|
| 54KH |
|
|
|
|
|
|
x |
|
|
|
|
| XLR (Race XL) |
|
x |
|
|
|
|
|
|
|
|
|
| EXL & LXL |
|
x |
|
x |
|
|
|
x |
x |
x |
x |
| J Model |
x |
|
|
|
|
|
|
|
|
|
|
| JD Model |
|
|
x |
|
|
|
|
|
|
|
|
| 30T (flathead) |
|
|
x |
|
|
|
|
|
|
|
|
| 37T (flathead) |
|
|
|
|
x |
|
|
|
|
|
|
| 36T (OHV) |
x |
|
|
|
|
|
|
|
|
|
|
| 39T (61") |
x |
|
|
|
|
|
|
|
|
|
|
| 39 & 39T (74") |
|
|
x |
x |
|
|
|
x |
x |
x |
x |
| 56 & 56T |
|
|
x |
x |
|
|
|
x |
x |
x |
x |
| 70T |
|
|
x |
|
|
|
|
|
|
|
|
| 82/72 & 82/72T |
|
|
x |
x |
|
|
|
x |
x |
x |
x |
| 82 & 82T |
|
|
|
x |
|
|
|
x |
x |
x |
x |
Check out our Engine Displacement Calculator to
determine Cubic Inches given bore and stroke.
Contact us if you would like any "Custom" Stroke
not listed.
Complete Crankshaft Assemblies
Truett & Osborn can supply
a complete crankshaft assembly for all Big Twin OHV models from 1936-1999.
This includes the flywheels (any stroke), H-beam style rods fit with
bearings/cages to Jims crankpin, Jims sprocket and pinion shafts, assembly and
dynamic balancing, It will come all assembled, balanced, and trued, ready to
install in cases. Pistons are not included, but we will need the weight of
the pistons, rings, wristpins, and keepers for balancing purposes.
Price for complete assembly is $995.00.
Now Offering 1986-Up EVO "3-Piece" Flywheel Assembly Repair
 
These Pictures Show the Right (Pinion Side) Flywheel after the
Damaged "Integrated" Pinion Shaft has been removed and a hole bored, tapered and
keyed to accept Harley-Davidson, Jim's Machining, or other aftermarket shafts.
This Picture shows the same right side flywheel with a Jim's
pinion shaft installed.
Moral to this story.....You no longer have to "throw away" your 3-Piece flywheel
assembly when you damage either the pinion or drive shafts. This is a very
economical option... You can avoid the cost of purchasing new flywheels and
dynamic balancing...... Just send us your damaged half (or entire Crank
Assembly) and we will fix it right. If you send your entire crank assembly, and
purchase your required shaft(s) from us..... We will assemble and true it for
free.
More details and pricing coming soon.... for now, contact us.
Please
Call or Email for expert advise or more
information.
  
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