PIONEER 610:
YEAR INTRODUCED: 1959
YEAR DISCONTINUED: 1959
ENGINE DISPLACEMENT: 6.21 cu. in. (103cc)
NUMBER OF CYLINDERS: 1
CYLINDER BORE: 2.25 in. (57mm)
PISTON STROKE: 1.5625 in. (40mm)
CYLINDER TYPE: Aluminum with cast iron sleeve
INTAKE METHOD: Piston ported
Improved version of 600A model