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  1. #1
    TDR's Avatar
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    XPL Rear exhaust

    I'm having problems i have already cut out the hole at the back for the rear exhaust and i dont know what to put. We had an idea but thats what stuffed us up. Any one got any ideas for the block off and the exhasut tip because im stumped.

    My local dealer said that the rxp rear exhaust wont fit because of the hose it would be to big and wont clamp on properly.

    Any feed back would be great because i am comited to this and we cant turn back.

    Thanks Nick


  2. #2
    TDR's Avatar
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    we have just measured our hole we cut and it is about 2-7/8 inchs that is enough to fit the riva rxp thru hull. but then our problem lyes in the hose, the XPl hoes will not fit over the riva exhaust tip because the RXP's use a bigger hose. Thier is the problem what do we do? becasue we are going to have to extend the exuast by 3 or 4 inches, what do we put between that? a coupler, steel. I dont know.

  3. #3

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    You cut the hole before you had the parts to put in?

    It seems like if you were going to a bigger opening from the exhaust to the pipe you are going to lose even more back pressure. Would this not cause more a of performance loss on your ski?

  4. #4
    mibunkerking's Avatar
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    Try to find a outlet for a 98gsxl. It's the same size as the xpl outlet but it's straight instead of a 90* turn. Then you just have to work out the hose issue. As for the old hole, either glass it in or put a peice of stainless plate over it and screw it shut and seal it.

  5. #5

    Hose size

    I just put the Riva rear exhaust on my GTX. The rear exhaust kit I received came with 2 pieces of the blue silicon 2 3/4" hose. This is a larger diameter than the stock hose that came off the exhaust; will not fit. You should be able to go to any hose supplier for semi truck supplier, as they carry the larger 2 3/4" hose that fits. Didn't you get the new hose with the rear exhaust kit???

  6. #6
    TDR's Avatar
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    Thanks guys for your replys. we have figured out what we are going to do.

  7. #7
    TDR's Avatar
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    Ah after a couple of days of wondering what to do my dad and i finaly finished the rear exhaust. We have only started it up dry for a couple of seconds and its loud. We made the pipe out of PVC piping witch is very strong and will stand the pressure. Now all we have to do is put cement and silicone all te way round inside and out. and block off the existing exhaust hole, and off to the boat ramp. I dont know whether to paint it black or not
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  8. #8
    mibunkerking's Avatar
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    its not the pressure you should worry about, its the heat. CPVC is what you use for hot water systems in a house because it has i high heat tolerence than PVC. and the water and gases will be HOT coming out that outlet. you really need to watch out for that peice melting.

    IMO you are going to sink your boat. its going to melt probably on the top right by your last curve in the stock hose. that hole will be below the water line. when your motor dies from the build up of fumes, the water will rush in faster than your bilge pump can get it out and you'll go down fast. probably in the middle of the lake as it will not melt till you hit WOT and dry out the waterbox. dont take that kinda of risk with your life.

    get a 98 gsxl outlet and some 2 1/2" semi heater hose from napa and do it right.

    just my .02

  9. #9
    Big K's son KeithKman's Avatar
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    That setup won't work. The PVC will melt.

  10. #10
    Work Harder, Millions on Wellfare Depend On Us! ultramaxracing05's Avatar
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    you will also have water coming into your hull. the silicone will not work unless you have a tigh tight and i mean tight fit, you will have to remember you will have ranging temperatures against that silicone plus vibration, there is too much vibration going on, and later you will find water seeping in. Ask me how I know.

    the way seadoo designed it works best there is a rubber gasket on the inside and you thread it through the outside, to create a tigh fit.

    you're better off buying a thru hull exhaust from riva,
    IMO I wouldnt put that rigged shit on there.

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