is smaller than the caging member so as to reduce the weight of the clutch in the illustrated embodiments the one way clutch is utilized for driving the engine crankshaft from a starter motor application_number US 60900490 A description referring first to fig3 a typical environment is illustrated in which a one way clutch constructed in accordance with the invention may be employed this comprises a motor scooter indicated generally by the reference numeral 21 and having a backbone type frame assembly 22 the frame assembly 22 supports a front fork assembly 23 for steering movement and the front fork assembly 23 rotatably journals a front wheel 24 a front cowling 25 is carried by the frame 22 and covers the front portion of the motor scooter 21 the frame assembly 22 includes a platform 26 for the rider 39 s feet and from which there extends a vertically upwardly extending frame member 27 a rear seat 28 is carried on the frame member 27 and overlies a luggage carrier 29 a rear wheel 31 is suspended from the frame 22 by means including a trailing arm assembly 32 the rear wheel 31 is driven from a power unit indicated generally by the reference numeral 33 in a manner to be described the power unit 33 includes an internal combustion engine 34 referring now to fig4 the construction and operation of the power unit 33 will be described as has been noted the power unit 33 includes an internal combustion engine 34 which in the illustrated embodiment is of the single cylinder two cycle crankcase compression type the engine 34 which may be considered to be conventional is comprised of a cylinder block 35 in which a piston 36 is supported for reciprocation the piston.