1993 Yamaha SuperJet 650 (Square Nose) – Classic Stand-Up Jet Ski

Description

The 1993 Yamaha SuperJet 650 (Square Nose) is a true legend in the stand-up jet ski world, revered for its lightweight design, aggressive handling, and bulletproof two-stroke power. Built by Yamaha, the square-nose SuperJet represents one of the most sought-after eras of stand-up personal watercraft.

Powered by Yamaha’s reliable 650cc 2-stroke engine, this SuperJet delivers crisp throttle response, strong mid-range punch, and the unmistakable sound and feel that two-stroke enthusiasts love. The compact square-nose hull is known for its nimble handling, making it ideal for freestyle riding, surf play, or classic recreational use.

This model remains a favorite among:

• Stand-up purists and collectors

• Freestyle and surf riders

• Riders seeking a lightweight, mechanical ski

• Enthusiasts restoring or preserving classic PWCs

With its iconic styling, proven performance, and timeless Yamaha engineering, the 1993 SuperJet 650 square nose continues to define what a true stand-up jet ski should be.

Engine & Powertrain

• Engine Type: Yamaha 2-stroke

• Displacement: 633cc

• Cylinders: Twin-cylinder

• Cooling: Open-loop water-cooled

• Induction: Carbureted (Mikuni)

• Cylinder Head: Pro-Tec aftermarket performance head

• Ignition: OEM Yamaha CDI

• Fuel System: Primer system installed

• Oil System: Pre-mix (converted from oil injection)

⚙️ Drivetrain / Jet Pump System

• Drive Type: Direct-drive jet propulsion

• Pump Type: Axial-flow Yamaha pump

• Impeller: Aftermarket performance impeller (installed)

• Intake Grate: R&D performance intake grate

• Ride Plate: R&D ride plate

• Steering: Shortened aftermarket steering pole

• Bilge: Electric bilge pump installed

🔊 Exhaust System (FULL SETUP)

• Exhaust Manifold: Coffman performance exhaust manifold

• Expansion Pipe: Coffman pipe

• Waterbox: Stock round-nose aluminum waterbox

• Exhaust Cooling: Water-injected

• Exhaust Outlet: Rear through-hull exit

• Sound Level: Aggressive performance tone (louder than stock)

🛠 Hull & Deck

• Hull Type: Square-nose SuperJet

• Graphics: All original Yamaha graphics

• Tray Padding: Original OEM padding

• Storage History: Always covered & kept indoors

• Notes:

  • Minor paint peeling on hood

  • Small fiberglass patch underneath from previous waterbox rub

  • Structurally solid hull

👤 Capacity

• Riders: 1 (stand-up)

• Seating: Stand-up tray

• Weight Class: Lightweight freestyle / surf ski