O.S.SPEED B2102 square stroke

intended use 1/8 off road buggy
displacement 3.46cc (0.211 cu. inch)
bore 16.40 mm (0.646 inch)
stroke 16.40 mm (0.646 inch)
practical rpm range 4,000 - 42,000 rpm
Max power 2.65 PS/34,000 rpm 2.61 HP/34,000 rpm
weight 347 g (12.25 oz)