Harley-Davidson

Unlimited Sportster Engines
Horsepower Gallery

 

Performance and Technical information on engines for Harley-Davidson motorcycles.

This is a list of verified horsepower figures for a variety of Sportster Unlimited Displacement Engines. The list provides information on the maximum horsepower recorded, the type of engine cases, the engine displacement in cubic inches (CID), head type with who did the modifications, type of camshaft, type of carburetor, type exhaust system, owner of the bike, the type of frame the engine was mounted in and the source of the data. Data sources used in building this list include Cycle-Rama, AMI, and various magazines. All horsepower figures listed here were confirmed on a dynamometer.

To have your bike listed here, send a copy of your dyno sheet data along with the other information listed in the Horsepower Gallery to us at the V-Twin Café.

 
Max
HP
Max Torque Engine Case CID Heads Compression Camshaft Carb Pipes Owner Bike From
100   HD 89 HD   Andrews N83 Mikuni HSR-45 Drag Pipes James Reader 1995 XL Dyno Run
105 103 S&S 89 S&S 12.4:1 Andrews BV S&S Super G Custom 2-1 Jim Livermore 1998 Custom Hillside Motorcycle Munnsville, NY
114 92 HD 79 S&S Greg Coen 11.5:1 Red Shift .585" S&S Super D Custom 2-1 Mo Coen Kosman Drag Greg Coen Motor Company
117 99   88 STD   Red Shift .643" S&S Super D ThunderJet Carl's   1991 XL Southside Johnny Glendale, AZ
120 99   88 STD
Reed Racing
11.5:1 Red Shift .643" Mikuni HSR-45 Kooks Header Steve Saunders 98 Buell S3 Flash Engineering
130   S&S 107 STD   Red Shift .723" Zipper's S&S Super D Custom Drag Smitty Smith 1999 XL American Iron Feb. 2000
133 120 HD 74 STD John Sachs 8:1 HD 883 AeroCharger w/40mm CV Kooks AreoCharger Jim Dye 96 Buell S2 World Wide Dynamics
137   HD 89 HD   Andrews N83 Mikuni HSR-45
Nitrous Oxide
Drag Pipes James Reader 1995 XL Dyno Run
143 129 S&S 100 Zipper's Billet   Redshift Zipper's S&S Super D Bassani George Crim and Art Northrup 94 XL Dyno Run
Aaron WIlson
164   HD 89 HD   Stock HD Mikuni HSR-42
AeroCharger
Nitrous Oxide
AeroCharger Joel Cox 1995 XL Dyno Run