Motorcycle engine method and apparatus

An assembly for modifying existing two-stroke single cycle 43 CC to 52 CC combustion engines for increase in horsepower, said assembly comprising:

• a. a two-stroke single piston engine cylinder having a wall thickness and a piston with piston skirt, said engine cylinder having two transfer ports and a fuel air intake port, said engine cylinder further comprising an additional transfer port, said additional transfer port having a mushroom shape configuration and excavated out of the interior face of said engine cylinder and the profile of said transfer port encompassing said fuel air intake port;
• b. a reed valve kit substantially configured to attach to the outer wall of said engine cylinder, said reed valve kit interposed between the fuel air intake port and the carburetor of said two stroke combustion engine;
• c. said mushroom shaped transfer port further comprising a top portion and a stem portion, said top portion including the fuel air intake port and a substantially rectilinear roof portion extending above the fuel air intake port, said stem portion in a substantially rectilinear configuration extending below said fuel air intake port;
• d. said mushroom shaped transfer port further comprising:
• i. the fuel air intake port having a rectilinear profile configuration with parallel top and bottom legs and parallel side legs;
• ii. said roof portion having a rectilinear width matching said fuel air intake top leg length, a rectilinear height extending to the same vertical height as the existing transfer ports;
• iii. said stem portion having a rectilinear width not more than two thirds the length of said fuel air intake bottom leg, a rectilinear height extending into the crank case of said engine cylinder.