The invention is an improved power transmission drive, for an internal
combustion engine. The drive is of the type having a flexible link medium
for transmitting power between a crankshaft of said internal combustion
engine and drive components not associated with a primary purpose of the
internal combustion engine. The drive is improved by the inclusion of a
drive frame, a camshaft sprocket releasably mounted upon the drive frame,
a crankshaft drive-wheel releasably mounted upon the drive frame, an
engine accessory mounted upon the drive frame, an accessory drive-wheel
mounted upon a shaft of the engine accessory, and the camshaft sprocket,
the crankshaft drive-wheel, and the accessory drive-wheel each entrained
by the flexible link medium.