The Powerplant
The GP800R is powered by a high-performance, 120 horsepower, two-cylinder, 784cc Yamaha marine engine. Two 44mm Mikuni carburetors with accelerator pumps feed this awesome powerplant, providing excellent throttle response throughout the total RPM range. Features include:
- Yamaha Power Valve System (Y.P.V.S.): Computer controlled, electronic, variable exhaust port timing for maximum horsepower at all RPM ranges with no compromise to throttle response.
- Ceramic-plated Cylinders: Optimal heat transfer, durable, accurate and consistent bore, lightweight.
- Yamaha Loop-charged Combustion: Fuel mixture actually loops as it enters the combustion chamber, which helps distribute fuel/air mixture evenly for better combustion, performance and fuel economy.
- Individual Seven Port Cylinders: Allows for high efficiency of fuel/air mixture transfer to combustion chamber.
- Accelerator Pumps: Maximum throttle response; no off-idle hesitation.
- High-performance Tuned Exhaust Pipe and Manifold: The equal flow manifold allows all cylinders to perform equally at peak performance. The exhaust chamber is specially designed to complement the Y.P.V.S. technology.
- Variable Oil Injection: Regulates the fuel/oil mixture to deliver only what is needed at different RPM levels; reduces smoke and oil consumption.
- Slanted Engine Mount: Airflow efficiency for greater response and power.
- Corrosion Protection System: Sacrificial zinc anodes protect the engine from harmful galvanic corrosion. Stainless steel fasteners (nuts, bolts, hardware) provide a long service life. Cylinders, cases and heads are all treated with a durable oxide coating to form a barrier between corrosion and expensive engine parts.
- Electronically Controlled, Variable Ignition Timing: For exact ignition advance control at all throttle positions and RPMs.
The Jet Pump Propulsion System
The GP800R 155mm Hyper-Flow jet pump propulsion system with three-blade stainless steel impeller is designed to maximize water flow for high performance. The GP800R pump configuration provides excellent hook-up and smooth acceleration. Features include:
- Quick Shift Trim System (Q.S.T.S.): Mechanically operated, this system offers instant change in the attitude of the watercraft while underway allowing for tighter turns or quicker acceleration on plane, as the rider prefers.
- Stainless Steel Impeller Housing Liner: For high durability, the liner maintains accurate clearance tolerances between the impeller and the housing.
- High Flow Intake Duct and Grate: The dynamic shape of these items directs water flow into the pump for better thrust, performance and hook-up.
- Cooling Water Intake Filter: Filters out harmful debris that could cause blockage of important cooling water passages.
- Pumps are Manufactured with YDC30: A combination of zinc and copper alloys, developed by Yamaha marine engineers, that offers excellent corrosion protection.
The Hull and Deck
The GP800R Sheet Molded Compound (SMC) hull and deck is designed specifically for two-person riding and competition. The GP800R hull is reinforced at critical load bearing areas for durability and strength. Features include:
- Integrated Bow Spray Guard: Reduces bow spray for a dry ride.
- High-performance, Grand Prix Racing, Semi-V Hull: This hull is as close to a competition race hull as any Yamaha introduced in the past. This hull, with its unique variable draft design, provides exact handling.
- Yamaha Adjustable Sponsons (Y.A.S.): This system allows the rider to adjust the turning characteristics of the watercraft to either a positive racing set-up or a more recreational feel.
Environmentally-minded Innovations
By employing proven technologies, Yamaha delivers significant reductions in noise levels without compromising performance and reliability. These technologies include:
- Yamaha Sound Suppression System: This system of integrated noise reduction components targets the three common types of noise: 1.) intake noise, 2.) exhaust noise and 3.) noise from vibration.
Additional Features
For added comfort and convenience, the GP800R comes standard with the following features:
- Multi-function Electronic Information Center: Provides the operator a quick read on speed, RPM, fuel level, oil level, low fuel warning, low oil warning, overheat warning and hour meter.
- Skid Resistant Footwells: Provides added traction and comfort.
- Padded Boarding Platform: Provides a stable platform while re-boarding.
- Finger Throttle Lever: Provides added comfort while reducing hand fatigue.
- Yamaha's Trademarked Visibility Spout: A waterspout from the rear of the craft that improves the watercraft’s conspicuity.
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