Two-stroke engine

A single two stroke engine comprising:

• a piston housing;
• a piston located in the piston housing;
• decompression valve means including a decompression valve movable in a mating bore of the piston and means for positioning said decompression valve in an open position during a portion of the initial upward movement of the piston for allowing gases from a top chamber in the piston housing to flow through the piston to a bottom chamber in the piston housing below the piston;
• a transfer port;
• an inlet port in the piston housing;
• a connecting rod integral with or otherwise secured to the piston;
• a crankcase located adjacent to the piston housing and sealed therefrom;
• a crankshaft in the crankcase;
• pivotal connection means between the crankshaft and connecting rod;
• and ignition means.

A single cylinder two stroke engine comprising:

• a piston housing;
• a piston located in the piston housing;
• decompression valve means including a decompression valve movable in a mating bore of the piston and means for positioning said decompression valve in an open position during a portion of the initial upward movement of the piston for allowing gases from a top chamber in the piston housing to flow through the piston to a bottom chamber in the housing below the piston;
• a transfer port;
• an inlet port in the housing;
• a connecting rod integral with or otherwise secured to the piston;
• a crankcase located adjacent to the piston housing and sealed therefrom;
• a crankshaft in the crankcase;
• pivotal connection means between the crankcase and connection rod, a magnet located in the crankshaft;
• and ignition means mounted inside the crankcase and adjacent the crankshaft for passage of the magnet by the ignition means to effect firing of the engine.