Video: RIVA Racing Limited Edition 2021 Sea-Doo RXP-X 350 Walkaround

Earlier this year, The Watercraft Journal revealed RIVA Racing’s latest duo of Limited Edition Sea-Doos. Within weeks, the allotted numbers of Sea-Doo RXT-X 350s and Sea-Doo RXP-X 350s, were sold out. That’s right. Despite the premium pricing for the added accoutrements that the Limited Edition tacks on, these machines were already bought and paid for well before we could get the opportunity to test ride one.

So when RIVA President Dave Bamdas invited us down to their new off-campus processing center to walk around one of the few remaining RXP-X 350s before being crated up and shipped out, we couldn’t say no. But again, as Dave cautioned, this belonged to a customer, so we weren’t going to be able to ride it. Rather, Dave wanted us to illustrate how anyone could recreate the same power and performance of a Limited Edition at home without the extra costs.

The power behind the RXP-X 350 begins with a RIVA MaptunerX BRP License, reflashing the factory stock tune for a reconfigured curve adjusted for the rest of the components listed here. Allowing the engine to breathe in cool, dense air, a RIVA Sea-Doo 2020+ RXT/GTX 300 Power Filter snakes over the RIVA Sea-Doo 300 Valve Cover Heat Shield drawing air from above the fuel tank.

The Sea-Doo was fitted with RIVA Sea-Doo Catch Can/Engine Breather Kit to eliminate crankcase fumes and oil vapor from the engine’s air intake charge. For the limited run, RIVA replaced the factory rubber hoses with high strength multi-ply silicone hoses found in the RIVA Sea-Doo 230/300 Intercooler Tubing Upgrade Kit with TIAL 50MM Blow-off Valve and a RIVA Sea-Doo 230/300 Boost Vacuum Port Adapter.

Feeding the 300 ACE more cool, dense air means increasing the fuel delivery, so a RIVA Sea-Doo High Flow Billet Fuel Rail was required. And while it’s not entirely necessary (let’s just call it “overkill”), each one of these skis got a RIVA Sea-Doo RXT/GTX Duel Rear Exhaust Kit. It’s a wild setup that sounds rad and definitely shows the other guys that you mean business.

For better hookup, RIVA installed a Solas Sea-Doo Concord SXX 13/18 Impeller for increased low-end thrust and top end speeds. Of course, WCJ’s must-have addition for ANY 300-horsepower Sea-Doo is a pair of RIVA’s Pro-Series Sponsons. There’s simply no better addition than these fully adjustable sponsons; you won’t believe the amount of influence they have on these PWC.

And speaking of control, RIVA replaced the stock plastic steering system with their aluminum steering neck and topped it off with the RIVA Sea-Doo 30-inch bars capped with 130mm black ODI Rogue Lock-On Grips and color matched RIVA ODI Grip End Cap and Clamp Kits. This setup alone removes the slop and flex in the factory plastic steering system.

Rounding out the steering system, RIVA replaced the plastic OEM control housings with their RIVA Sea-Doo Control Switch Housing Set and Billet iControl Levers. The aluminum throttle and brake levers are a direct replacement for the stock plastic levers. The levers offer more responsiveness, control, and comfort when racing and riding aggressively.

And while the Ergolock-R seat has got to be the most race-ready seat available on the market today, it could benefit from from a grippier cover, so a RIVA Sea-Doo Seat Cover was installed. [For more detail on the seat cover, check out the close-ups in the video below. –K]

While the Limited Edition Sea-Doos were sold off months ago, anyone reading this article or watching this video and recreate the same power and performance by checking them out on the RIVA Racing website or following the links provided in this story.

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Kevin Shaw

Editor-in-Chief – Kevin Shaw is a decade-long powersports and automotive journalist whose love for things that go too fast has led him to launching The Watercraft Journal. Almost always found with stained hands and dirt under his fingernails, Kevin has an eye for the technical while keeping a eye out for beautiful photography and a great story.


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