05038731 is referenced by 23 patents and cites 10 patents.

A balancer system for suppressing vibrations in an internal combustion engine for a motorcycle has pair of balancer shafts, and a pair of first and second primary counterbalances supported on the balancer shafts, respectively, for rotation about axes parallel to the crankshaft of the engine in ganged relation to the crankshaft at the same speed as and in the opposite direction to the crankshaft. The balancer shafts extend parallel to the crankshaft and are positioned one on each side of the crankshaft. The first and second primary counterbalances are rotatable about respective centers which are connected by a line passing through a substantially central portion of the crankshaft, the first and second primary counterbalances being rotatably supported on the balancer shafts near ends thereof, with the centers being spaced from the central portion of the crankshaft by substantially equal distances.

Title
Balancer system for internal combustion engine
Application Number
7/550597
Publication Number
5038731
Application Date
July 10, 1990
Publication Date
August 13, 1991
Inventor
Toshio Shimada
Wako
JP
Agent
Armstrong Nikaido Marmelstein Kubovik & Murray
Assignee
Honda Giken Kogyo Kabushiki Kaisha
JP
IPC
F02B 75/06
View Original Source