Get XiED(tm)! Performance Parts

Don't let the Harley heat monster ruin your riding.
Reduce  Engine Surging
Improve Throttle Response
Reduce Engine Ping


HD 2007/2008 Engines

High Heat on 2007/08 HD engines

HD 2007/08 Performance Recommendations

Cool your exhaust temperature with the Wide Band O2 upgrade for 2007/08 HD

Harley Camshaft Specification Tables

HD Twin Cam Engine Builds
TC 128 HP 95 CID
TC 100HP Street Engine

The basics of Fuel Injection explained

Rammer Performance Air Cleaners
TC Performance Heads 100+HP

Pro Tuning on a Shade Tree Budget


Sportster Engines up to 1200 cc
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 Engines up to 1200cc. 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 Torque Engine Case CC Heads Compression Camshaft Carb Pipes Owner Bike From
45   HD 883 HD   HD Stock CV Stock   1999 XL Hot Rod Bikes
June 1999
51   HD 883 HD   HD CV w/SE air cleaner Stock   1999 XL Hot Rod Bikes
June 1999
53   HD 883 HD   HD CV w/SE air cleaner CSI Long Drags   1999 Xl Hot Rod BIkes
June 1999
55   HD 883 HD   HD CV w/SE air cleaner SuperTrapp 2-1   1999 Xl Hot Rod BIkes
June 1999
56   HD 883 HD   HD CV w/SE air cleaner SE Slip Ons   1999 Xl Hot Rod BIkes
June 1999
56   HD 883 HD   HD CV w/SE air cleaner Samsom 2-1 Shorties   1999 Xl Hot Rod BIkes
June 1999
56   HD 883 HD   HD CV w/SE air cleaner CCI 1 7/8" drag   1999 XL Hot Rod Bikes
June 1999
58 51 HD 883 HD 9:1 Screamin Eagle Bolt-in CV rejetted by owner 1 7/8" drag "Stretch" Eacret 1995 XL MMI Phoenix, AZ
65 50 HD 883 HD 9:1 Screamin Eagle Bolt-in CV rejetted by owner V&H Pro Pipe John McCullough 1997 XL House of HD
Anchorage, Alaska
66 72 HD 1200 HD Dual Plug   HD CV HD Stock Gene Wilson 1999 XL Sport Dyno Run
72   HD 1200 HD Dual Plug   HD CV w/ Thunderslide HD with SE Slip ons Charlie Parks 1998 XL Sport DeQuincy Paint and Body
76 75 HD 1200 HD Dual Plug   HD CV w/ Thunderslide HD with SE Slip ons modified Gene Wilson 1999 XL  Dyno Run
77 80 HD 1200 HD Modified 10:1 Andrews N2 S&S Super E SuperTrapp 2-1 Scott Binkley 1991 XL Sport Dyno Run
82   HD 1200 Buell   HD CV SuperTrapp 2-1   1996 XL Dyno Run
Kit Moto, France
82 80 HD 1200 HD dual plug 10:1 Andrews N8 CV SuperTrapp 2-1 Ed Mercanti 1999 XL HD Baltimore
83   HD 1200 HD dual plug 10:1 Andrews N8 CV w/Dynojet BOS 2-1 Stephane Vandenbulcke 1999 XLS Motorshop Claassen
Bree, Belgium
85 83 HD 1200 Buell Bill Bishop 10.2:1 SE Bolt-in CV Modified Thunderheader Amy Sanborn 1995 XL Hawg Quarters
Redford, MI
86 75 HD 1200 HD Zippers Stage 2 10.5:1 Red Shift 567V2 S&S Super E w/Thunderjet SuperTrapp 2-1 Edwin Swinehart 1998 XL Sport Dyno Run
86 82 HD 1200 Buell Dual Plugged 10:1 Screaming Eagle Bolt-in Mikuni HSR-42 Vance & Hines Pro-pipe Tim Conmy 1998 XL Sport Dyno Run
91 78 HD 1200 Buell by Bill Bishop 10.2:1 Screaming Eagle  CV Modified Vance & Hines  Bill Bishop 1998 Buell S1 Hawg Quarters
Redford, MI
94 84 HD 1200 Nallin Stage 2
Buell Thunderstorm
10.5:1 Andrews N4 Mikuni HSR-42 Thunderheader Moshe Levy 98 XL Black Hills Customs
Rockaway, NJ
98   HD 1200 HD Modified   HD Keihin FCR-41 Buell Race Martin Hone 1998 Buell DynoBike
103 86 HD 1200 Buell by Brian Nallin 10.5:1 HD Mikuni HSR-42 Buell Race Frank Amerman 1998 Buell WalterBros HD


Table of Contents
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Nightrider COPYRIGHT

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Modification, Installation, Maintenance and Tuning Index  will help you find most of the information you want on one page.

How to get Professional Tuning Results at home
Testing the Innovate Motorsport LM-1 portable air fuel meter

Profession Tuning on a Shade Tree Budget

Veypor VR2 Data Logger and Instrument Panel
Video Installation and Demo
Purchase VR2

Engine Performance
How to Build a
TC96 2007 Engines
TC88 70HP Stage1  
TC95 128HP Stage 3
TC95 100HP Street
TC96 2007 Stage 1/2
EVO 64 HP Stage 1
EVO 74 HP Stage 2
EVO 82 HP Stage 3
EVO 95 HP Stage 3
883 to 1200 Upgrade
Shovelhead Modifications

New EFI for EVO and TC

Performance Gallery
Horsepower Gallery
Evolution 80
Twin Cam 88/95
Evolution Unlimited
Sportster Unlimited
Drag Strip Gallery
Land Speed Racing Gallery
CV Carburetor
Modifying the CV carb
Tuning a CV carb
Selecting a cam
Install a TC 88/95 cam
Install a Big Twin cam
Install Sportster cams

Camshaft Specifications
Twin Cam

Exhaust Systems
EVO Exhaust Testing
TC Exhaust Testing
Khrome Werks AR100 test
Making Drag Pipes Work

Shop Manual
Carburetor Troubleshooting
Finding Manifold Leaks
Cylinder Heads
Pistons and Cylinders
Belt Drive
Shop Manual Appendix
$20 Bike Lift
Plug Wires
Spark Plugs
Engine Tuning
Nitrous Oxide
Motor Oil
Stutter Box
General Information
WEB Links
Buy Books and Manuals
Performance Calculations
Estimate Horsepower
Estimate 1/4 Mile Time
Estimate Top Speed

Engine Displacement
Exhaust Length
Gear Ratios
Air Density

The Nightrider Diaries
The ramblings of a genius a, a madman and something in between.

Where is Sifton Cams?

Autocom Active-7 tested

Harley-Davidson EFI
-EFI basics explained
-EFI modifications explained

183 HP, 2 carbs, 2680cc

Copyright 1997-2006  Stephen Mullen, Oldsmar, FL -+-