JETWERX Yamaha 1.8L Performance Race Engine

Built to Dominate. Engineered to Survive.

If you're looking for the strongest foundation for your Yamaha WaveRunner, you've found it.

The JETWERX Yamaha 1.8L Performance Race Engine is built for riders who demand uncompromising reliability under extreme horsepower. Whether you're lining up at Hydro Drags, building an all-out high-boost race machine, or simply want the confidence of a professionally assembled performance engine for aggressive recreational riding, every JETWERX engine is hand-built using premium components and proven machining practices.

This isn't a mass-produced remanufactured engine. Every engine is individually built to order, carefully measured, inspected, and assembled to meet the demands of serious performance enthusiasts. From mild performance upgrades to extreme horsepower combinations, our engines are designed to provide a solid platform capable of handling today's most demanding supercharger and turbocharger setups.

Premium Components

Every engine is built using a combination of industry-leading performance parts selected specifically for your application.

Depending on your build, your engine may include:

• Forged CP, Wiseco, or JE Pistons

• Premium Carrillo or Molnar Connecting Rods

• Performance wrist pins

• Heavy-duty performance bearings

• Precision-balanced rotating assembly

• Custom piston ring gap setup

• Performance head gasket

• ARP hardware (when applicable)

• Optional upgraded valve springs

• Optional oversized valves

• Custom camshaft packages available

• Sleeved or non-sleeved block configurations

• Precision machine work and blueprint assembly

Every build is tailored around your horsepower goals, fuel type, boost level, and intended use.

Why Choose a JETWERX Engine?

At JETWERX, we don't believe every customer needs the same engine.

We work with you to build an engine that fits your combination instead of forcing you into a one-size-fits-all package. Whether you're planning a reliable weekend lake cruiser or a dedicated race ski, we can configure your engine to match your goals.

Our engines are built with attention to detail from start to finish, including:

• Complete inspection of all components

• Precision measurements throughout assembly

• Proper bearing clearances

• Accurate piston-to-wall clearance

• Correct ring end gap setup

• Torque specifications followed throughout assembly

• Professional final inspection before shipment

The result is an engine built to withstand the punishment of high RPM, increased boost, and demanding riding conditions.

Perfect For

• Hydro Drag Racing

• Closed-course competition

• High horsepower supercharged builds

• Turbocharged Yamaha WaveRunners

• Aggressive recreational performance riding

• Riders looking for the ultimate engine foundation

No Core Required

Unlike many engine builders, there is absolutely no core exchange required.

Keep your existing engine or use it for another project—your purchase includes a complete custom-built engine with no core return obligation.

Lead Time

Because every engine is custom-built specifically for each customer, current production time is approximately:

4–6 Weeks

Lead times may vary depending on parts availability and build complexity.

Need Something Custom?

Every build can be customized to fit your exact needs.

Whether you're targeting 300 HP, 500 HP, or an all-out race build, contact JETWERX to discuss your combination before ordering. We'll help you choose the proper components for your application.

⚠️ IMPORTANT DISCLAIMER

This engine is designed and sold as a high-performance competition engine. While many customers choose to use these engines during aggressive recreational riding, this product is intended for racing and off-road performance applications.

Professional tuning, proper fuel, adequate cooling, and regular maintenance are absolutely critical to engine life. Improper tuning, detonation, lean conditions, overheating, over-revving, insufficient fuel quality, or installation errors can cause catastrophic engine failure.

The purchaser assumes all responsibility for proper installation, tuning, operation, and maintenance.

NO WARRANTY

THIS IS A CUSTOM-BUILT HIGH-PERFORMANCE RACING ENGINE.

Due to the extreme operating conditions associated with modified and competition engines, JETWERX PROVIDES NO WARRANTY, EXPRESSED OR IMPLIED.

There is no warranty against engine failure, component failure, tuning-related damage, overheating, detonation, abuse, misuse, improper installation, racing, competition use, or normal wear.

By purchasing this engine, the customer acknowledges that all high-performance engine modifications carry inherent risks and accepts full responsibility for the operation of the engine.

ALL CUSTOM ENGINE SALES ARE FINAL.

Performance parts are intended for experienced enthusiasts and professional installers. If you have any questions about your build, horsepower goals, or supporting modifications, contact JETWERX before placing your order so we can build the perfect engine for your application.