Winter project Wave venture 700ís
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  1. #1
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    Winter project Wave venture 700ís

    Hello all, new forum guy here. I picked up a matching pair of wave venture 700ís and Iím planning on making a winter project of them to be ready in the spring. What I know about them so far, both have good compression of 140+ on all clyinders. And they will both fire up, but only one will idle after a min. The other needs spray to keep running. So at a min, I have 4 gen. Mikuni carb kits ready to go. The next plan was to remove exhausts and clean water passages as I see one of them had started to melt some foam next to the water box. The exhaust tubes seem ok, then on to do a pressure test of crank cases and fuel systems. SoÖif both machines pass leak down, would you consider the crank seals ok to run? Or is it worth all the trouble to completely remove engines, split cases, and do crank seals? And finally, these came factory with stainless reeds. What are your thoughts on boyesen power reeds (dual reeds) or should I just stick with and run factory reeds. To be clear, these will be used only a few times a year by family and my daughters. No beatings from teenage boys etc lol. Both machines have 150ish hours on them. Thanks!!

  2. #2
    Resident Guru bored&stroked's Avatar
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    Re: Winter project Wave venture 700ís

    If the lower end holds vaccum, then the seals are fine.
    Any reed is fine, they all work. I've run carbon reeds in the past when I didn't want to use oem, but now I have Vforces.
    '96 Suuuperjet: 84mm 61x, ported, B-pipe, Dual 44's, Newmiller head 220psi w/girdle, Skat big hub, footholds, AMG green hell mango matte.
    '95 Raider 701: Fiberglass not SMC, Hydrotrailer hitch, ugly purple and yellow everywhere.

  3. #3
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    Re: Winter project Wave venture 700ís

    Ok thanks I’ll see how the pressure tests go and I’m gonna go with boyesen dual stage reeds.

  4. #4
    PWCToday.com Is My Home Away From Home wmazz's Avatar
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    Re: Winter project Wave venture 700ís

    Quote Originally Posted by MattS View Post
    Hello all, new forum guy here. I picked up a matching pair of wave venture 700’s and I’m planning on making a winter project of
    them to be ready in the spring. What I know about them so far, both have good compression of 140+ on all clyinders.

    And they will both fire up, but only one will idle after a min. The other needs spray to keep running. !
    Have you started working on your idle problem.


    Bill M.
    Horsepower == Speed, RPM != Speed



  5. #5
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    Re: Winter project Wave venture 700ís

    I’ve got genuine Mikuni kits for both machines and a set of boyesen reeds for both machines to clear up idle issue. Neither had ever been rebuilt so I’m starting there. After, of course I follow your advice on the pressure/vacuum tests. I’ve built up a nice pressure tester and I’ll use a mityvac set up to check with vacuum.

  6. #6
    PWCToday.com Is My Home Away From Home wmazz's Avatar
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    Re: Winter project Wave venture 700ís

    Quote Originally Posted by MattS View Post
    but only one will idle after a min. The other needs spray to keep running.
    A vacuum leak will cause that. It is a common problem on
    Yamaha's and all the other brands. I have listed the places
    the 701's leak and possible repairs.


    Quote Originally Posted by MattS View Post
    these came factory with stainless reeds. What are your thoughts on boyesen power reeds (dual reeds) or
    should I just stick with and run factory reeds.
    On dyno runs for Yamaha watercraft and atv; Dual stage reeds show
    an increase at low rpms, and a power loss at peak hp (but I have not
    seen dyno runs for the 701).


    Bill M.
    Attached Images Attached Images
    Horsepower == Speed, RPM != Speed



  7. #7
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    Re: Winter project Wave venture 700ís

    Thanks for those images I’ll be sure to focus there as I will be replacing those gaskets and I’m very anal about getting surfaces prepped.

  8. #8
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    Re: Winter project Wave venture 700ís

    So far the seals look good. Held 7 psi with absolutely zero psi loss after 10 mins. Now on to test with vacuum as well. As a side note, when I put in the boyesen dual stage reeds, should I expect to change any factory carb settings? I’m rebuilding carbs with gen Mikuni kits and not touching the needle springs.

  9. #9
    PWCToday.com Is My Home Away From Home wmazz's Avatar
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    Re: Winter project Wave venture 700ís

    Most people wouldn't make a change, but I think even a bone
    stock 700 would benefit from a small increase in the low jet,
    (2 sizes) #72.5. I would try leaning the pilot screw a little too.
    Start with 1/2 front and rear.

    The idle drop test may get better results.


    Bill M.

    My stock specs book
    Stock spring is 115gr and 1.5 seat.
    55 psi
    #120 front, 130 rear
    67.5 low
    5/8 pilot screw +/- 1/4 turn
    5/8 front high speed +/- 1/4 turn
    1-1/8 rear high speed +/- 1/4 turn
    Last edited by wmazz; 10-25-2021 at 02:00 AM.
    Horsepower == Speed, RPM != Speed



  10. #10
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    Re: Winter project Wave venture 700ís

    Ok perfect thank you

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