| For those owners of the Twin Cam Harley | | | | bore kit that includes the new cylinders and |
| Davidson Motorcycle you may find that the 63 | | | | pistons. I'd recommend using Forged pistons |
| HP your bike has from the factory is not | | | | as they can be reused if you decide to add |
| quite enough power. While the Twin Cam | | | | new heads in the Stage 3. Common in the |
| engine is a great improvement over the 80 | | | | stage 2 build is the addition of a new CAM. |
| inch Evolution motor there is much that can | | | | The combination of the 95 inch kit, cam and |
| be done to make more power. | | | | pistons should get your motorcycle in the |
| | | | 80HP range. |
| Stage 1 | | | | |
| | | | Stage 3 |
| The Twin Cam motor in most new Harley | | | | |
| Davidson Motorcycles is stock as an 88 inch | | | | For those with more money to spend you can |
| twin cylinder motor. Stock horsepower is | | | | further boost your power 90-95HP by adding |
| around 63 and makes for a decent ride with | | | | new Cylinder Heads and forged pistons. On my |
| generally acceptable power. Adding what is | | | | 2000 FXSTS this put me at 96HP and 100 Ft/Lbs |
| known as a Stage 1 kit can boost this power | | | | of Torque. |
| to 70+ HP. A typical stage 1 bolt on will | | | | |
| include new exhaust, and air cleaner. Some | | | | Depending on the parts you choose you may get |
| folks will also put a carb kit in their stock | | | | more or less HP than what's indicated here. |
| CV carburetor or bolt on an aftermarket carb | | | | The idea was to provide a basic description |
| like an S&S B or Mikuni HSR42. For those | | | | of the various stages and parts involved. |
| folks with fuel injection a new map can be | | | | |
| added that will make your motorcycle work | | | | For exhaust I'd recommend for max midrange |
| well with the new exhaust and air cleaner. | | | | benefit choose a two into one system. If you |
| | | | must go with a two into two then try and find |
| Stage 2 | | | | a manufacturer that specializes in |
| | | | performance like the Python III. There are |
| When 70HP isn't enough, you can get to about | | | | many makers of great looking and sounding |
| 80 HP by adding a big bore kit. You can | | | | pipes but performance is usually an |
| either have the cylinders bored our or bolt | | | | afterthought. |
| on new cylinders. Harley sells a 95 inch big | | | | |