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]
| 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 | ||||
| Engine Type |
Source of Information |
||||
| Twin Cam | Install a cam in your TC | Crane | S&S | TC Cam Specs | Jims Special Tools |
| 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 |
HSR-42 EVO and TC |
|
| Mikuni HSR-45 | 1.77" | HSR-45 EVO and TC |
HSR-45 EVO and TC |
|
| S&S Super E | 1.56" | Super E- EVO | See Install | |
| S&S Super G | 1.75" | Super G- EVO | 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 01 FXST |
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
2-1 Exhaust Systems
2-2 Exhaust Systems
Drag Pipes and Porkers
Modified Drag Pipe
Step Drag Pipe
Clutch FAQ
Primary Drive Belt Adjustment
| By S&S | Engine or Cases | Heads | Big Bore | Crankshaft | Stroker Kits | |
| Twin Cam | TC Rocker Boxes | |||||
| Evolution | Evo Engine | Evo Heads | Evo Big Bore | Big Twin Flywheel | Big Twin Stroker | Big Twin Cam Cover |
| Sportster | XL Cases | XL Big Bore | Big Twin Rods | XL Stroker | ||
| Shovelhead | Shovel Engine | Shovel Heads | Big Twin Flywheel | Big Twin Stroker | Big Twin Cam Cover | |
| 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 | |||
| Intake Manifold | EVO Intake | XL Intake | ||||
| Cylinder | ||||||
| Pistons | EVO Pistons | XL Pistons | Compression Ratio | |||
| Case | ||||||
| Crankshaft | ||||||
| Transmission | ||||||
| Clutch | HD Clutch | HD Clutch | HD Clutch | Typical | Typical | |
| Ignition | EVO Electronic | Shovel Electronic | Electronic | |||
Motion Software Mini-Dyno Manual
$20 Bike Lift
What is the best Oil?
Nitrous Oxide systems
Voltage
Regulator
Performance Software downloads
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]
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