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  1. #1

    Bypassing 2nd water box stx-15f

    I know u can buy a new exhaust section to bypass the 2nd waterbox but has anyone just put a 180 deg silicone u hose and connected the first waterbox outlet into the final section that exits the ski? It appears to be not quite on the same angle and I'm not sure if it would go straight on or if I need to either rotate the 1st box or the last piece and maybe re drill the exhaust end holes. The silicon hose is only $30 on eBay. Tx guys


  2. #2
    nicjak's Avatar
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    we used to do this on the 250's just used a u shaped pipe and the oem rubber couplers

  3. #3
    xxx2's Avatar
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    i did it with silicone tubing and pipe,also cut open the 1st w/b and drilled some holes then welded back up, also took the turndown tip off...gettin around 69mph in 06
    Last edited by xxx2; 11-11-2014 at 03:08 AM.

  4. #4
    69 ? That's heaps good. Got any pics ? So u removed 2nd wb and the 2 hoses that connect to it and used silicon 180 hose from 1st wb to the alloy pipe that runs out the back ?

  5. #5
    xxx2's Avatar
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    If I remember right I bought a u and used factory rubber, into piece of pipe, into silicone, piece of pipe, out factory rubber hose...i think riva sells a bypass and May have instructions on their site. No pics on phone..was 8 years ago, looked like a red/black/silver 2006. Also had r&d rideplate, think it was a tweaked 14/20 prop from impros, air intake, advanced timing, and trued the hull. Ride plate was best gain...

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