I have recently installed the stage 1 kit to my RXPX with the additions of the air box mod and the rear exhaust mod. This kit would be the best buy for money that i have spent in all my years of jetski's. The difference that this kit has made to my ski is definately a huge gain in both horse power and performance. I definately recommend this kit to anybody seeking more power from their RXPX.

Thanks Riva, Great kit
Aussie rxpx

thanks for the info iam putting in the stage 1 kit in my rxtx this winter did you do the manifold up grade for more boost. an what are you seeing for mph it must be fast

Welcome to our forums!

Thank you for the feedback. I'm glad you're happy with the results. Did you install the kit yourself?

sounds like the exhaust mod was easy to install do you need to re locate any thing in the back ive just bought the riva exhaust kit

yes its fast the water wasnt dead flat but 72mph on gps should go faster in flat water yes put the kit in myslef i put the 82mm ring in for a start but it feels awesome

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yes put the kit in myslef

Great! Being that you're running in salt water and the temps are getting up there in your region 72mph is good. We've found the 4-TEC's lose some performance when it heats up. And salt water doesn't help either. On calm fresh water with cooler air and water temps you'll run 74+ all day!

Have you thought about swapping out the stock thermostat with our Thermostat Kit? It alone will drop the engine operating temps by as much as 30°F. That will definitely help on the really hot days and/or longer rides.

yes i would like to buy the thermostat kit but how the aussie dollar is against your dollar i might have to wait,thats good to hear it might go 74+ i will get out to the fresh water very soon and see

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but how the aussie dollar is against your dollar i might have to wait,

I didn't think anything could get weaker than our dollar....

yes you should feel it here 75 cents in your dollar not good,do you think anyone in aussie would have the thermostat kit in stock over there

Give Australian Jet Ski (Labrador-Queensland) a try. If they don't have one try Water Craft World in New Zealand (Penrose-Auckland),

thanks riva i contacted australian jetski and thay are very well priced maybe i will have the thermostat kit very soon thanks for your help

Great!