The action is cooking, once again, in the RIVA workshop. The last time we took a look at the wizardry going on behind the scenes at RIVA, they were busy taking an RXT-X 325 and turning into a dream machine with custom graphics, RIVA’s billet steering system, sponsons, and Stage 2 engine modifications, including a power filter, blow-off valve, Maptuner ECU tuning and a Solas impeller, as well as a dual rear exhaust kit, a Wet Sounds audio upgrade and more.
And, according to a recent release on the RIVA Racing Facebook page and YouTube channel, the latest build starts off with a 2025 Yamaha Jet Blaster Pro 2-Up and piles on the excellence from there. In a detailed video, Dave takes us through the upgrades and mods for this custom lunar yellow and mint Jetblaster, starting with the RIVA Stage 1 engine package, and replacing the plastic plenum and rubber hose with the ultra-reliable RIVA rear exhaust system that improves performance by reducing back pressure and gives the added benefit of a nice deep exhaust tone.
The stock air box is replaced by with a high-flow power filter with stainless steel elements, a reflash on the factory ignition control unit using the RIVA Maptuner Nano engine reflash system, allowing interface with your smartphone. An intake manifold upgrade kit replaces the restrictive stock mesh screen with a high-flow billet aluminum sleeve, resulting in more airflow, thus more horsepower.
Other highlight features of the build include a 1217 Solas Concord Impeller to increase the operating RPMs from a stock ~7,500 to 8,400 RPM and is perfectly matched to the Stage 1 engine package; a performance ride plate and toploader intake grate with an aggressive design compared the stock unit, allowing more water into the jet pump, increasing op speed in rough water conditions; the adjustable pro series sponsons, giving significantly improved handling.
A number of additional steering and control upgrades are capped off with the install of a RVIA JetTrim Seat Cover, improving not only looks, but taking advantage of the effective non-stick material to help keep you planted on the seat no matter how aggressive you get on the water.
The end result is incredible acceleration and a top speed of 57 MPH @ 8400 RPM.
See more details and the complete build specifics below:
This custom built craft features a host of RIVA Performance Products perfectly matched to the Yamaha JetBlaster platform. The modified engine delivers incredible acceleration and a top speed of 57 MPH*. To complement the added power, the unit is equipped with upgraded steering and handling components for complete rider control. This JetBlaster Custom Build was hand built by our team of performance experts and water tested to confirm performance. The craft stands out from the crowd with exclusive hull graphics and custom seat cover.
We don’t claim to be the undisputed kings of custom-built watercraft – although we’re pretty darn good at it. It’s safe to say that the watercraft we do build are a good representation of what we love to do – take great watercraft, and turn them into a badass racing machine. These watercraft are built in-house by our very own master technicians and guaranteed to make everyone’s head turn when you blow past them.
BUILD COMPONENTS
ENGINE
Maptuner Tuning License RY110SC-TL
Power Filter Kit RY13210
Intake Manifold Upgrade Kit RY12090-IMUK
Rear Exhaust Kit RY15210
PUMP & HANDLING
Solas Concord Impeller YJ-CD-12/17
Performance Ride Plate RY21100
Pro-Series Sponson Kit RY26120
STEERING & CONTROLS
Billet Aluminum Control Levers RY24160-RCL-GM
ODI Rogue Grips (130mm/No Flange) L31RGB-S
RIVA ODI Grip End Cap & Clamp Kit RY206-BK
APPEARANCE & COMFORT
Custom Seat Cover (Black w/Silver Stitching) RY5-210-1
