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


Harley-Davidson Modification, Installation, Maintenance and Repair Index

Here is our collection of modification, upgrade and tuning instructions for Harley-Davidson performance components. These instructional guides provide an extensive amount of information for the installation and maintenance of most of the components you might need for your bike.

[stage modifications] [camshafts] [carburetors] [ignition] [exhaust] [drive train] [cylinder heads] [performance theory] [software downloads] [engine diagrams]

How to build your engine

Engine Type

Extend of Modifications

Twin Cam - Caruburetor Stage 1 Stage 2
TC 88
Stage 3
TC 88
Stage 2
TC 95
Stage 3
TC 95
TC HP Gallery
Twin Cam - EFI Stage 1 Stage 2
TC 88
Stage 3
TC 88
Stage 2
TC 95
Stage 3
TC 95
Evolution Stage 1 Stage 2 Stage 3
bolt on
Stage 3 Stage 4
Big Bore
Evo HP Gallery
Sportster       883 to 1200 Conversion Stage 4 Unlimited XL HP Gallery
Shovelhead     Stage 3     Shovel HP Gallery


CAMSHAFT Installation and Specifications

Engine Type

Source of Information

Twin Cam Install a cam in your TC Crane S&S TC Cam Specs Jims Special Tools

Install Pushrods

Evolution Install a cam in your EVO Crane S&S EVO Cam Specs Install Pushrods
Sportster Install a cam in your XL   S&S XL Cam Specs Install Pushrods
Shovelhead Install a cam in your Shovel Crane S&S Shovel Cam Specs Install Pushrods
Panhead   Crane S&S   Install Pushrods
Pushrod Installation    Crane Adjustable
Crane Timesaver
S&S Adjustable    
Camshaft Basics Selecting a Cam       Install EVO cam gear on new cam

Carburetors Installation and Tuning
Carburetor Troubleshooting

Carburetor and Electronic Fuel Injection

Type Throat Size Installation Modifying the carb Tuning
Keihin 40mm CV 1.58"   Keihin CV w/HD parts Adjust a CV carb
Keihin 40mm CV w/DynoJet Kit 1.58"   89 - 95 EVO
96 - 01 EVO
99 TC
00 -01 TC
See Mods
Screamin' Eagle 44mm CV 1.73"      
Mikuni HSR-42 1.65" HSR-42
EVO and TC
EVO and TC
Mikuni HSR-45 1.77" HSR-45
EVO and TC
EVO and TC
S&S Super E 1.56" Super E- EVO

Super E - TC

  See Install


S&S Super G 1.75" Super G- EVO

Super G - TC

  See Install


S&S Super B 1.56" S&S Super B   See Install


S&S Super D 1.95"     Jetting
DynoJet Powercommander 2/3 NA 97-98 EVO
99-01 FLH
  See Install
Vance and Hines Fuel Pack NA 95-96 EFI
97-00 EFI
V-Thunder Injector Overdrive NA 95-97 EFI    

 Ignition Modules, Coils, Electrical and Plug Wires

    Crane HI-4
    Crane HI-4E
    Crane HI-4TC
    Dyna 2000
    Ignition Pickup
    Coil-Single fire
    Coil-Dual Fire
    Plug Wires
    Shift Light
    Spark Plugs
    Fix hard starting on high compression engines

Exhaust Systems

    Exhaust Systems for Evolution
    Exhaust Systems for Twin Cam
    Drag Pipes and Porkers
    Modified Drag Pipe
    Step Drag Pipe

Drive Train

    Clutch FAQ
    Primary Drive Belt Adjustment

Cylinder Heads, Cylinders and Pistons

By S&S Engine or Cases Heads Big Bore Crankshaft Stroker Kits  
Twin Cam   TC Rocker Boxes        
Evolution Evo Engine

Raising compression and Head Milling

Evo Heads 

Evo Rocker Boxes 

Evo head gasket

Evo Big Bore Big Twin Flywheel 

Big Twin Rods 

Big Twin pinion gear

Big Twin Stroker Big Twin Cam Cover 

Big Twin Oil Pump 

Evo Valve Springs

Sportster XL Cases   XL Big Bore Big Twin Rods XL Stroker  
Shovelhead Shovel Engine Shovel Heads 

Shovel head gasket

  Big Twin Flywheel 

Big Twin Rods 

Big Twin pinion gear

Big Twin Stroker Big Twin Cam Cover 

Big Twin Oil Pump


Mechanical Assembly Drawings

Component Twin Cam Evolution Sportster Shovelhead Typical Assembly Performance Information
Rocker Box   EVO Rocker Box XL Rocker Box      
Cylinder Head   EVO Heads XL Heads     Assembly  torque Values

Compression Ratio


Valve Sizes

Intake Manifold   EVO Intake XL Intake      
Pistons   EVO Pistons  XL Pistons     Compression Ratio
Clutch HD Clutch HD Clutch HD Clutch Typical Typical  
Ignition   EVO Electronic   Shovel Electronic Electronic  

Engine Performance Theory

    Motion Software Mini-Dyno Manual


    $20 Bike Lift
    What is the best Oil?
    Nitrous Oxide systems
    Voltage Regulator

Performance Calculations

    Performance Calculations
    Exhaust Pipe Designer
    Drag Race Simulator

[stage modifications] [camshafts] [carburetors] [ignition] [exhaust] [drive train] [cylinder heads] [performance theory] [software downloads] [engine diagrams] [top of page]

Many of these guides are from the manufacturer of the part. These guides are copyrighted by these companies. Motorcycle Performance Guide provides these as a service to user of this WEB site based on the good will of the companies.

For some of these sheets, you'll need a copy of Adobe Acrobat reader. If you don't have this software, it can be downloaded for free by clicking here. See copyright notice 

Table of Contents
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Nightrider COPYRIGHT

Ask us a Question

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 -+-