Yamaha FX-1 is a stand-up watercraft built in very limited numbers in 1994 & 1995. It carried the same engine as the Super Jet.
Similar in size to those in the mid 1970s.
(Taken from the 1994 Yamaha water craft catalog.)
144mm pump vs. 122mm pump
FX-1 and 1994-1995 Super Jet had identical 701cc carburetor engines with 63 hp.