Its a guide to modify and tuning Harley Davidson motorcycles, you can read the step by step instructions. To modify and tune the Harley Davidson engines you need to add some components, these components include air cleaners, carburetors, exhaust systems and ignition systems. Recommended parts list for bolt on performance: air cleaners, screamin’ eagle air cleaner kit, K&N Air Filter. Caraburetors: Stock Keihin CV (Modified by one of the following methods), Harley jets with ‘do-it-yourself’ modifications, DynoJet carburetor re-calibration Kit, DynoJet ThunderSlide Kit. Yost Power Tube. Exhaust Systems, Ignition Systems, Screamin’ Eagle, Ignition Coils, Plug Wires. Modifications Build a 64 horsepower 1340 Evolution engine. Building the ultimate ‘bolt-on parts’ engine: Install the mufflers, Install the air cleaner kit, Re-jet the carburetor, Install the ignition module, Install the ignition coil, Install the spark plug wires, Road test the bike, Dyno Tune the bike. These modifications will provide from 80 to 120 horsepower at the rear wheel of a late model 80 CID Harley-Davidson big twin Evolution engine. Building your Stage 3 engine: Disconnect battery, Drain gasoline from tank, Remove heads, cylinders and pistons, Remove cam, lifters and lifter blocks, Install cylinders with new pistons, Install ignition module, Remove exhaust system baffles, Set static ignition timing, Road test the bike.
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