Watcon Compares ’21 Yamaha SuperJet with RIVA Stage 1 vs. Stock Machine


Two 2021 Yamaha Super Jets face off in Wisconsin for a speed comparison test. One PWC is modded with a RIVA Stage 1 tune. The other PWC is mostly stock and owned by John Zigler, host, and owner of Watcon/Rock County Jet Ski (RCJS). His friend Sean owns the modified ski.

They meet on the water at a lake in Wisconsin. Zigler’s ski is outfitted with a few performance parts. It has a RIVA Free Flow Exhaust, Billet RCJS tri-scoop, Rick Roy Handle Pole, and over the pivot steering. He has the steering maxed out and short and tight, making it very responsive.

Sean’s ski is a 2021 Yamaha Super Jet with the RIVA Stage 1 Tune and a reflashed ECU. It has the cold air intake, RIVA Power Filter Kit, Free Flow Exhaust Tube, Solas 1217 Impeller, Kommander Scoop Grate, and the VK Composites Ride Plate.

The basis for this comparison is RIVA’s claim that the Stage 1 Tune gives a 5mph gain over the stock ski. RIVA has shown GPS readings of 63mph during some of their speed tests. During Zigler and Sean’s runs, the best that Sean’s SuperJet reached was a solid 58.9. and Ziglar’s SuperJet reached 54.9.

There were a few contributing factors for Sean’s ski not reaching the 5mph gain. First, the fact that his ski was nose heavy due the ride plate installed. It caused the ski to ride slower. Another factor was that the wind picked up and created some chop on the water when Sean made his run. Check out the clip for all the details.

It is informative and Zigler does well to explain the process and offers to answer any questions and to help you out.

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Ocean Priselac

An avid mountain and bodyboarder who lives by "if you don't go, you'll never know," with an affinity for wildlife and animal rescue; surf forecasting is a huge part of Ocean's life and was a winner in Red Bull's Project Swell several years ago. The 2014 LB2CAT was her first jet ski competition and can't wait to do it again!

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