Here is a picture after the tape was removed,paper towels pulled out of the case,and dykem (blue dye) was removed.
This engine had its tranfer ports of the "Aggresive trail ported" cylinder matched to the engine case while the engine is assembled,and while it is still installed in the frame. This can be done! It also works VERY well! Why cheat yourself out of power that the cylinder can produce? It took longer to prepareand tape than to actually cut and blend. The cutting and blending took about 7 minutes. Some cases require alot of material to be removed. Some very little.
This picture shows how you must properly tape the opening of the case to prevent aluminum chips from entering the case. The job is already completed in this photo
Here is another shot of the tape job. While I was using the carbide double cut bit (6" long) I also had the hose of a small shop vacuume within an inch or two of the bit to evacuate the chips. The blue dykem is just a die I use to see my scribed lines. Other things work just as well...paint,marks-A lot pen,etc,etc.
Here is a picture after the tape was removed,paper towels pulled out of the case,and dykem (blue dye) was removed.
joeak47

Here is a picture after the tape was removed,paper towels pulled out of the case,and dykem (blue dye) was removed.

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