Bishop's Performance
(313)537-5026

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Site last updated on
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© Bishop's Performance

Sportster

Twin Cam Evolution Sportster Break-In

These are the basic parts that we use in our most popular packages.
Some parts may vary by model and/or personal preference.
Additional parts and/or machining may be involved.
Optional items are marked with a  # .   SE = Screamin' Eagle
®
2004 and later models may be different.

Evo Sportster

Basic 883-1200 Conversion

Heads Stock w/ 1200 Conversion valves
Cylinders Bored Stock -or-  HD 1200 cc Conversion
Pistons Keith Black 1200 Conversion (reverse dome)
Cams Stock
Air Cleaner SE
Intake SE Manifold
Fuel Management Stock Carb w/ Keihin Jet Kit
Ignition SE  -or-  Stock 1200
Exhaust # Cycle Shack slip-on mufflers,
V&H Pro-Pipe  -or-  Thunderheader 2-1

Example of
Sportster 883-1200
Basic Conversion

883-1200 conversion = before and after


Package #1

 883-1200 Conversion
-or-   1200 upgrade

Approximately 80-85* hp and 80* ft-lb torque

Heads Buell "Thunderstorm"
Cylinders Bored Stock -or-  HD 1200 cc Conversion
Pistons Buell "Thunderstorm"
Cams SE "Bolt-In"
Air Cleaner SE
Intake SE Manifold
Fuel Management Stock Carb w/ Keihin Jet Kit
Ignition SE  -or-  Buell 1200
Exhaust # Cycle Shack slip-on mufflers,
V&H Pro-Pipe  -or-  Thunderheader 2-1

Example of
Sportster
Package #1

Amy's Dyno Graph 2001


Package #2

 883-1200 Conversion
-or-   1200 upgrade

Approximately 90-95* hp and 80* ft-lb torque

Heads Buell "Thunderstorm", Stage 2 porting
Cylinders Bored Stock -or-  HD 1200 cc Conversion
Pistons Wiseco "Thunderstorm"
Cams SE "High Performance"
Pushrods Adjustable, with covers
Lifters SE  -or-  V-Thunder
Tappet Pin Kit Red Shift
Air Cleaner SE  -or-  "Forcewinder"
Intake SE Manifold
Fuel Management SE 44mm CV & Pingel petcock
Ignition SE  -or-  Buell 1200
Coil & Plug Wires SE
Roller Rockers # SE
Clutch # Rivera Pro-Clutch  -or- Extra plate kit
Exhaust # V&H Pro-Pipe  -or-  Thunderheader 2-1

Examples of
Sportster
Package #2

Amy's Dyno 04-'02

Exhaust Comparison Dyno - XL package #2

Want more even power?  Give us a call!

Notes

When using Buell heads on a Sportster, the front motor mount bolt holes
must be enlarged for 7/16" bolts into the heads.

* Actual results may vary.

Twin Cam Evolution Sportster Break-In

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