650 Wave Jammer Engine Swap and novice Freeride/ Freestyle ski
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  1. #1
    PWCToday.com Is My Home Away From Home theVetteman3's Avatar
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    650 Wave Jammer Engine Swap and novice Freeride/ Freestyle ski

    This is a simple build that I have been interested in doing for a while.

    Back in 2008 right after my brother and I got our first jet skis, we had a good friend who bought a wave jammer. We didn't know what we were doing, but somehow managed to have fun and learn a WJ, sxi pro, and X2. We're into our fifth riding season now, and I still enjoy the WJ. No I'm not insane. I'm going to outline a few reasons and ideas for this build.

    Cheap. I got a Waverunner 650 LX ski, which ran, for $50 off CL. The LX uses a detuned 650 engine with WR/ WJ500 driveline parts and motor mount adapters. So basically its a drop in package into the WJ hull.

    Guests. My brother and I typically have many guests come out each year. I'd say most only come out once or twice. That is not much time to learn how to ride a stand up. If we get them on a x2, usually its help them balance, point and shoot and hope they dont fall off. The jammer is a sit down which anyone can master within minutes.

    Girls. Girls love this ski. It is easy and not intimidating. Even cute in a severely ugly sort of way. My good friend who bought one initially is now married. His wife says they will never sell the jammer. I think their GP800 is on the way out...

    Silly. I've said this before, but this is a very silly jet ski. It is so nice to have something which you aren't tweaking every second you're out trying to get that last .1mph. The handling is junk. But you learn to respect the limits of the handling and instead work with it, and enjoy it for what it is. Some of the most fun moments I've had on a jet ski was cat and mouse type "dogfighting" with my friend on his GP800 and me on the Jammer. The jammer can do 180s very easily, but is very power limited. Basically I hold the 0 to 10mph manuverability advantage. My friend on the GP had HP, speed, torque, stability, basically everything more than me except that slow speed agility. He would work so hard to out manuver me that he would have a rash on his thighs from his seat.

    I figure a little extra hp and a good impeller will take this ski to the next level. The highest performing 650 LX Group K has listed is just a hair under 45mph. I'm using that as my goal. Eventually this ski will get a big bore and porting. Figure 100lbs less weight than the LX and 45 with good acceleration doesn't seem too bad.

    I will not do a pump swap. From what I've seen on my 550/750 I know these small pumps have a decent amount to give. The jammer is fairly light and I think that helps. I'll be working with a freshly rebuilt pump, mint wear ring, and a perfect impeller to get the right hook up. Too many people get bogged down trying to get bigger pumps in this ski, and then never follow thru.

    Oh and also this ski will be getting a sweet make over to make all my newbie friends more anxious to ride it. Better vinyl and 2 color turf, think like blowsion freeride ski.

    One last thing, as with all of my builds, I will take this ski as far as I can. When I get to the "feasible limits" I will enjoy it for what it is. Even so it will still put a smile on my face!

    Got the WR 650 LX for 50 bucks, which included the engine, ebox, carb, pipe, motor mounts, and a few other bits.

    Got a 87 WJ500 delivered to my work for $300 with trailer. Sold the trailer for a quick $150.

    I've already cleaned the engine, and purchased a SJ 650 head. The LX uses a 2 piece head with a lower compression ratio. I figure since they originally matched the 650 with a much heavier LX hull which can sit 2 people, the WJ can probably take the added strain because it will be one person and lighter.

    Next up is purchase an impeller and a gasket set.





    IMG_20110524_062303.jpgIMG_20110524_062315.jpg2010-08-03 19.41.18.jpg
    1985 JS550/800 "Pretty Red": Newmiller 800, Rhaas 750 pump conv. [56.3mph gps]
    2009 1100 SJ:
    Kawi 1100 build in progress
    2009 SJ MINT:
    KP steering adaptor, Worx 228 intake, PWR ride plate [47.3mph gps]
    1987 WJ650:
    6M6, JD Intake Grate, 17/20, Coffmans Sizzler [48.5mph gps]
    1994 XiR: 830cc Superstock, PJS side draft, 13/18 swirl [53.7mph gps]
    1995 SJ MINT:
    Worx 205 intake [42.5mph gps]



  2. #2
    PWCToday.com Is My Home Away From Home gto0209's Avatar
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    Re: 650 Wave Jammer Engine Swap and novice Freeride/ Freestyle ski

    sweet I like these oddball builds!
    Charlie
    95 sc yami 760
    94 blaster 1100
    97 sj

    Looking for a complete coffmans sc pipe and waterbox, pm me if you have one

  3. #3
    PWCToday.com Is My Home Away From Home garrcass's Avatar
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    Me and a buddy where talking about how those actually might be fun to ride with more power.. he said he was watching a video of a Guy side slipping one in a river and it looked fun.. there was a chick in the 90's that did freestyle on one of those.. SBrider says paint it like a Geraph I can't spell it haha
    Last edited by garrcass; 07-08-2012 at 05:55 PM.
    ( Girlfrends are cheap X2,s are expensive )

  4. #4
    PWCToday.com Is My Home Away From Home cudaben's Avatar
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    Re: 650 Wave Jammer Engine Swap and novice Freeride/ Freestyle ski

    i think its giraffe my macs auto spell didn't light up so i think were good with that one.
    "If it ain't broke, fix it till it is".

    "If all else fails, immortality can always be assured by spectacular error"
    - John Kenneth Galbraith

    Best x2 so far- 91 x2, 750 small pin 750, lightened stock flywheel. Msd enchancer, Coffman pipe, 8/16 c75 prop, tbm stuffer pjs RIP turn nozzle, 7400 rpms. GPS 54 MPH

  5. #5
    PWCToday.com Is My Home Away From Home JSNate's Avatar
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    Re: 650 Wave Jammer Engine Swap and novice Freeride/ Freestyle ski

    Subscribed!

  6. #6
    PWCToday.com Is My Home Away From Home theVetteman3's Avatar
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    Re: 650 Wave Jammer Engine Swap and novice Freeride/ Freestyle ski

    Ha my buddies was red and yellow and we called it the Angry Giraffe. It even had eyes on it at one point.

    Since mine is blue it was called Nessie for the lock ness monster. Since it was quite skanky the name became Skanky Nessie soon followed by Skankasaurus.

    Engine was very crusty but a little cleaning with Works toilet bowl cleaner made it look like new without harming the paint. Pics to come, this picture uploader blows hugely on smart phones.
    1985 JS550/800 "Pretty Red": Newmiller 800, Rhaas 750 pump conv. [56.3mph gps]
    2009 1100 SJ:
    Kawi 1100 build in progress
    2009 SJ MINT:
    KP steering adaptor, Worx 228 intake, PWR ride plate [47.3mph gps]
    1987 WJ650:
    6M6, JD Intake Grate, 17/20, Coffmans Sizzler [48.5mph gps]
    1994 XiR: 830cc Superstock, PJS side draft, 13/18 swirl [53.7mph gps]
    1995 SJ MINT:
    Worx 205 intake [42.5mph gps]



  7. #7
    PWCToday.com Is My Home Away From Home gto0209's Avatar
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    Re: 650 Wave Jammer Engine Swap and novice Freeride/ Freestyle ski

    get the mobile photobucket app, they load instantly.
    Charlie
    95 sc yami 760
    94 blaster 1100
    97 sj

    Looking for a complete coffmans sc pipe and waterbox, pm me if you have one

  8. #8
    PWCToday.com Is My Home Away From Home theVetteman3's Avatar
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    Re: 650 Wave Jammer Engine Swap and novice Freeride/ Freestyle ski

    Just did I'll mess with it later.

    Here are some pics. Although hard to tell because the grime looks like it has chipped off, I could not for the life of me get this junk off without anything other than works. Even a wire brush would not even touch it!


    2012-07-02_20-31-49_889.jpg
    2012-07-04_11-01-37_428.jpg
    2012-07-07_13-06-03_54.jpg
    2012-07-07_14-14-38_974.jpg
    1985 JS550/800 "Pretty Red": Newmiller 800, Rhaas 750 pump conv. [56.3mph gps]
    2009 1100 SJ:
    Kawi 1100 build in progress
    2009 SJ MINT:
    KP steering adaptor, Worx 228 intake, PWR ride plate [47.3mph gps]
    1987 WJ650:
    6M6, JD Intake Grate, 17/20, Coffmans Sizzler [48.5mph gps]
    1994 XiR: 830cc Superstock, PJS side draft, 13/18 swirl [53.7mph gps]
    1995 SJ MINT:
    Worx 205 intake [42.5mph gps]



  9. #9
    PWCToday.com Is My Home Away From Home theVetteman3's Avatar
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    Re: 650 Wave Jammer Engine Swap and novice Freeride/ Freestyle ski

    Here's a couple good pics of my friend on his. This guy can muscle around a jammer like nobody's business.

    IMGP1457.JPGIMGP1459.JPG
    Last edited by theVetteman3; 07-09-2012 at 10:21 PM.
    1985 JS550/800 "Pretty Red": Newmiller 800, Rhaas 750 pump conv. [56.3mph gps]
    2009 1100 SJ:
    Kawi 1100 build in progress
    2009 SJ MINT:
    KP steering adaptor, Worx 228 intake, PWR ride plate [47.3mph gps]
    1987 WJ650:
    6M6, JD Intake Grate, 17/20, Coffmans Sizzler [48.5mph gps]
    1994 XiR: 830cc Superstock, PJS side draft, 13/18 swirl [53.7mph gps]
    1995 SJ MINT:
    Worx 205 intake [42.5mph gps]



  10. #10
    PWCToday.com Is My Home Away From Home theVetteman3's Avatar
    Join Date
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    Re: 650 Wave Jammer Engine Swap and novice Freeride/ Freestyle ski

    Also if someone has a pipe, head pipe, and manifold for a 650 let me know, I'm interested.
    1985 JS550/800 "Pretty Red": Newmiller 800, Rhaas 750 pump conv. [56.3mph gps]
    2009 1100 SJ:
    Kawi 1100 build in progress
    2009 SJ MINT:
    KP steering adaptor, Worx 228 intake, PWR ride plate [47.3mph gps]
    1987 WJ650:
    6M6, JD Intake Grate, 17/20, Coffmans Sizzler [48.5mph gps]
    1994 XiR: 830cc Superstock, PJS side draft, 13/18 swirl [53.7mph gps]
    1995 SJ MINT:
    Worx 205 intake [42.5mph gps]



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