Inclined forward 10 degrees, the cylinders are cast in unit with the upper crankcase. What is surely a balance shaft housing projects from the front of the case. In one of the views of this engine, a card on the stand begins “90 x 71.” If these numbers are the bore and stroke, they make this Twin a hefty 903cc, which is consistent with the very large butterfly throttle bodies on the rear of the head. Only two injectors are used, located downstream of the butterflies. The throttle shaft carries a pulley made for dual cable operation; no ride-by-wire here.