How do you decarbonize a pipe?  Im a noob.

Decarbonizing a pipe is a time consuming dirty job.  The best method I have found is to take a torch and heat every square inch of the whole pipe surface to a dull red color.  This will crystallize the goo and hard carbon and loosen it's adhesion to the inner pipe wall.  Now put about a quart of 1/4 inch size sharp edged gravel inside the pipe and shake until all of the scale is gone.  The three major problems with this method is it sometimes distorts the pipe to the point that it no longer fits the bike, it destroys the nickle or chrome finish and may weaken the metal if you get the metal too hot. 

Another way is to find an engine shop that has the old fashion hot tank with the caustic cleaning solution.  The problem with this method is finding a way to pump the cleaning solution through the inside of the pipe so that it contacts every square inch of the inside of the pipe for a long enough period of time to remove all of the carbon and goo. 

The silencer's perforated core and the tube from the pipe to the silencer must be decarbonized.  This is very important because a pipe that is a little restricted in these areas can cause severe piston overheating and piston failure!!!