Identify that Super Jet?

[MegaManAU]

So as the title states, I am trying to identify my Super Jet. I am a newbie when it comes ski's in general, but have learned quite a bit over the past year. I picked up a '96 XP and realized I needed a stand-up ski as well.
I picked up a '97 Super Jet that I picked up from jcagle. I ride on Lake Martin, AL; and surprisingly ran into a gentleman and his family who apparently built the ski for pro-stock racing. They named it the "Easter Egg" because of the fancy airbrush paint job it had.

So when I purchased it Justin's ad stated the following:
"I have a 1997 superjet with tons of aftermarket extras!
Girdled ada head, polished aluminum handle pole with umi steering, k&n flame arrestors, billet driveline couplers, 46 mm carbs, racing dump nozzle (trims down), dry pipe, msd enhancer, brand new battery, tachometer, bilge system, cover craft cover(like new), and custom paint! Looks great! $4800 if I am missing something I will add it!"

After I ran into the gentleman on the lake he stated he thought he remembered the engine being stroked.
I noticed the cylinder had been engraved with "ROCKET". Which leads me to believe something is special about this engine.

1.) Is there an easy way to find out what this actually is, or is the best way to pull the head and measure stroke and bore?

2.) Waterbox - Any Idea what it is?

3.) Engine Bay - Factory Dry Pipe, MSD Enhancer, ADA Girdled Head, 46mm carbs... What else am I Missing?

I prefer the freestyle approach over the racing, so I flipped the trim system to up-trim, rode it all last season and progressed from never having ridden a stand-up to riding every day and becoming comfortable to run across the lake and back, pulling off some tricks and goofing off and eventually snapping the handlebars in half. Now I feel like it's time to start modding. I have some lofty goals set, but before I really commit, I would like to know what I have, or what to look for.

4.) SOLAS 14-18.5 (How noticeable is pitch change? For example transitioning down to: 13-17)?

5.) Worx intake grate (version)?

Thank you for any help, advice and support!
-Adam

 

[Quinc]

If it is stroked there will probably be a spacer plate between the cylinders and the cases. You will notice a huge difference changing pitch. You can send your Solas to impros.com and have Dave re pitch it for your goals.

Edit: Waterbox looks like stock.

 

[MegaManAU]

Thank you Quinc! No spacer between the cylinders and cases. Only a spacer between the Carbs and 62T case.

Sent from my iPhone using Tapatalk

 

[Quinc]

There was a thread a while back that explained how to tell by taking off the head and measuring the stroke of the piston. You might get more bottom end by removing that spacer that between the carb and mani.

 

[MegaManAU]

Good to know on that carb spacer.
I am planning to pull the motor this weekend and measure stroke and bore, run the calculations and see what I come up with. I assume its the same as an automotive engine.
Engine Displacement = (pi)r^2(Stroke)(number of cylinders =2)
I will look for that post as well, just to make sure there are no unforeseen measurements that need to be taken.

1.) I assume my handlepole is an "AC racing Rick Roy" pole, and I assume I need a shorter one as well.

2.) I updated the first post with the intake grate. Would I be correct in assuming it is a Worx Dominator WR205D Pump Stuffer Intake Grate? Do I need to upgrade it to a 201 or this one good enough or now?

 

[Quinc]

You can shorten your AC pole. The worx 205 is more then good enough.

For calculating stroke:
http://www.x-h2o.com/index.php?threads/yamaha-62t-61x-displacement-vs-bore-stroke-combinations.5136/

Read through these:
http://www.x-h2o.com/index.php?forums/tech-faq.26/

And checkout a few of these:
http://www.x-h2o.com/index.php?forums/my-ski-and-buildups.15/

 

[TheBuzzard]

thats clearly an old race setup boat and probably puts out about as much power as you are going to get. all those parts and work done , were done in combination. you are probably only going to make it worse/have less power if you start dicking with it. race boats are setup for mid to top power. even if you did manage to get all the power at the bottom end, its still not going to be enough power to do flatwater flips n rolls,so if thats what you are thinking, forget it. pull a spark plug out and measure the stroke of the piston from bottom to top. 68mm is stock and anything over that is stroked. throw a nice purple chin pad on it and beat it

 

[Big Kahuna]

That ski will roll all day long if you have footholds. Flips, forget about it unless you have a double-up boat wake or on the surf. I saw that ski once years ago, more like over 10 or 12

 

[yamanube]

You would likely benefit from changing the impeller out to a lower pitch/radial blade design, something like a Skat swirl or Impros hooker. I agree with Buzzard, assuming the engine runs well and has good compression, I wouldn't go messing with it.

 

[MegaManAU]

Those are my thoughts as well. I don't want to mess with the motor, just find out more about it. I was debating on chopping the rear and front glass, but leaning more toward an AM hull and just doing it right the first time. I also hate cutting up that paint job, as I would rather sell it and someone else enjoy it. (It was painted in '97 and I think I put the first chips in the paint.)

 

[Yami-Rider]

As stated... If your wanting to do freestyle your just want to start fresh with a freestyle motor.

You are missing the coupler cover (very important part) it help keep water out of the engine, which is even more of a problem since your running pods. Your also missing one of the pipe pipe mounts.

Don't cut up that ski, save for a a/m hull.

Pole length is a preference thing. I ran a -3 on my sj.

 

[Quinc]

If you dont want to cut her up and still do freestyle until you get another hull. Start by calling impros.com and changing the impeller.

 

[MegaManAU]

Yami-rider, Thanks for the heads up on the missing parts. I did notice the water issue last season and thought it was something I was doing wrong.

I did talk my self into an AM hull last night. Now just to decide on which one I want and can afford.

 

[MegaManAU]

For that ski, how low is too low for the impeller? Is a 9 too low? or shoot more toward that 12 and 13?

 

[yamanube]

It's worth a call to Impros, tell them what you have and they will tell you what to buy. All manufacturers are different so its not as easy as just picking a number and finding an impeller with that pitch.
If I had to guess, Id say you are in the ballpark of a 9/15-10/16 Hooker or 13/17 Swirl.

http://impros.com/store/index.php/i...ler/yamaha/impros-yamaha-hooker-impeller.html

 

[Quinc]

Knowing Dave he is going to say for freestyle a 9/15, and if you still want a little bit of top speed to chase boats a 10/16.

 

[yamanube]

Without knowing what the porting and bore is on that motor it could go either way, especially with big carbs and a dry pipe.

 

[Big Kahuna]

Knowing Dave he is going to say for freestyle a 9/15, and if you still want a little bit of top speed to chase boats a 10/16.

Actually, he will ask about your setup. I was running a fairly mild 84mm bigbore and he said go with the 10-16 Hooker. Spot on. All depends on setup. I am running an 82mm ported motor and had Dave re pitch a 9/15 to a 9.5/15.5 because I felt a 9/15 would not be tall enough

 

[Quinc]

Actually, he will ask about your setup. I was running a fairly mild 84mm bigbore and he said go with the 10-16 Hooker. Spot on. All depends on setup. I am running an 82mm ported motor and had Dave re pitch a 9/15 to a 9.5/15.5 because I felt a 9/15 would not be tall enough

And after you tell him about your setup he will recommend one of those two hookers...

 

[MegaManAU]

Finally got my other two skis repaired and ready for summer, so now its time to get down and dirty with this one. In that time I have decided that I am going to do whatever maintenance I need to on this one to get it ready for summer as well. BUT One major update is that I have talked my self into an aftermarket hull. But I need it to ready to ride in 2 months.

My biggest dilemma is to buy a RTR or just the hull and try to fit most of my current components into an AM hull. Obviously its sounds easier on a forum, than it will be in person.
Without being the typical newb on a forum, I do want to be able to do a flat-water back-flip, but I would rather look further than that and say I want to be able to grow into this ski and do more than just a back-flip, so combos would be nice. I don't ever plan on competing and would like to run pump gas. Primary riding is flatwater, some boat chasing, and freestyle.

I am lost on direction to pursue currently, but looking at Chris Fiore's old ROKR as an option.
or a BOB Gen 2 Hull. (really anything available)
Any advice is greatly appreciated.