A balance system for a single cylinder engine (10) is described. The single cylinder engine (10) generates forces, that if left unbalanced, cause significant vibrations or movement to the single cylinder engine (10) and devices driven by the single cylinde...

In an inclined engine where a cylinder (2) projects from a crank case (1) obliquely and upwardly, when seen in a direction parallel to a center axis (3) of a crank shaft, under a specific observation condition in which the cylinder projecting direction is ...

A method of manufacturing a cylinder head and crankcase for a small engine. A crankcase and a cylinder head are cast to close tolerances and include as-cast mounting flanges, which are assembled in face-to-face contact by employing self-threading screws. B...

A main bearing case(7) has a bearing holder(61) for holding a bearing(11a) so as to support a crankshaft(12), and a crankcase mounting section(62) at which it is joined to a crankcase(3). Rib walls(63) are provided so as to surround the bearing holder betw...

The method determines position and angular speed of the crankshaft. The period from the upper dead center to a set rotary angle of the crankshaft, or lower dead center, is measured, and the measured periods of two subsequent rotation of the crankshaft are ...