New lightweight Yamaha F90 four-stroke
This remarkable achievement means improved performance and better balance when fitted on hulls in this category. The F90 is based on the F115B’s four-cylinder power unit. The F90’s reduction in weight and improved compactness is achieved by adopting a SOHC design actuating four valves per cylinder. This unique valvetrain design was first seen in Yamaha’s award-winning F70A, one of the …
Read More »