A fuel valve is provided in the Diesel fuel supply line to a cylinder to be
deactivated. A return fuel line is provided and when the fuel valve is
open, the fuel is returned to the fuel supply tank. In closed position
fuel is directed to the top portion of the cylinder. The cylinder is
provided with a conventional exhaust valve. However, the intake valve is
modified to be located closer to the top of the cylinder. The previous gap
of about 1/4 inch is reduced to about 0.005 to 0.015 inches. This allows
the intake valve to remain open instead of closed as the piston moves
upwardly in a deactivated cylinder when the exhaust valve is closed, to
allow air to exit through the intake valve from the cylinder and relieve
pressure when the piston is in the full up position. This valve system may
be located in all Diesel engines including Diesel powered motorcycles.
