Advance Engine Modifications

There are several ways to make something out of metal. The part can be stamped, cast, forged or machined. In fact, most motorcycle parts are a combination of more than one of these operations.

The chosen methods of metal working for a given part are usually based on economy of scale. If you are going to make a lot of a given part it is usually less expensive to have a set of dies made and cast it or forge it than it would be if you where machining it from a solid chunk of metal.

On the other hand, if you are operating in custom or small lot sizes then the CNC machines make a fully machined part not only possible but also cost effective. There is another reason to fully machine a part: if you need or want to possibly make changes to it design later on.

So what does all of this theory of metal production have to do with motorcycles? It explains why some would make billet heads and cylinders for their custom highly modified motorcycle engines.

By using advanced multi-axis CNC machines, it is possible to precisely tailor thee motor's individual parts to the exact performance needs of the buyer. Especially in a one make motorcycle racing, in which all motorcycles are restricted to use the same engine specifications.

It is possible to change the Engine Characteristics of a common motorcycle engine with just a few modifications and still meet the requirements set by the racing commission.

Modification requirements of different displacements are addressed by having the ability to not only run camshafts that complement a rider needs, but also machine a multitude of different combustion chamber shapes and valve sizes, without changing the actual combustion chamber volume. It is also possible to provide superior performance by coating the cylinder bores with a Ceramic Coating. Power is increased, streaking is eliminated, and piston skirt and ring wear is reduced.

Just having a CNC machines does not guarantee a great engine, though. The key ingredient of building a great motorcycle engine is experience, and lots of testing. For most amateur racing fans the only option will be of the stock high-performance kits for a regular motorcycle engine.