Super Jet New guy, advice needed in upgrading his 96 superjet

koftis

koftis

Location
greece
Hi everybody,


Last year i bought a 96 superjet with some stuff on it. It has a RIVA exchaust (red), RIVA ride plate, hull reinforcements form the inside, UMI steering system and dual bildge pumps. I will get the tubbie sponsons and an MSD inhancer as well. I want your advice though regarding some questions that i have:
  • I want to change the ride plate and get from blowsion the CF d cut one. What do you think about it? Keep in mind that the ski is not for racing but for freestyle/freeride use
  • What size are the stock carb's?
  • If i change the cylinder head do i need to change the carbs as well?
  • What size impeller is the best to use with the stock pump?
  • What about the Vreeds? Shall i change them as well?
I know that these quwstions might sound silly but i keep in mind that i do not knwo a lot of stuff regarding the 2 stroke engines.
best regards,

Kostas
 
Matt_E

Matt_E

steals hub caps from cars
Site Supporter
Location
at peace
The Blowsion Kenny Lip Ripper rideplate works great. I have one and it's one of my favorite plates I have used.
The stock carbs are dual Mikuni 38 SBN's.
You do not need to change the carbs if you change the head. In fact, the stock carbs are pretty good until you get to big bore size or run crazy mods on the motor.
As for impellers, I have experience only with some old impellers, the Solas Concord, and a Skat Trak Swirl (or Freeride Swirl). I preferred the Skat impeller, in size (pitch, really) 13/16. Others may suggest a Hooker impeller or even a stock 2008, 2009, or 2010 Superjet impeller.
I wouldn't worry about changing reeds until much later. They work fine.
 
oxnard111

oxnard111

Creative RE Purchasing
Location
so Cali, Ventura/Oxnard area
Hello Kostas! Welcome to the X.

You might consider the ATP Epic ignition over the MSD enhancer unless you can pick an enhancer up for cheap. The EPIC isn't that much more and should much more reliable.

Will you be riding flat water or surf?

You might consider contacting Tomski here on x-h20.com. He makes a really awesome D cut ride plate that is just as good if not better quality than the blowsion ride plate for a cheaper price. My buddy just bought one and the quality is incredible.

A 96 superjet came with dual 38 carbs.

You do not need to change the carb if you change the cylinder head.

There are a couple great impellers for a stock pump but impellers are dependent upon a bunch of factors including altitude, carbs, compression, etc. With that being said, an IMPROS Hooker impeller 9/15 works great in my stock pump.

Reeds are another subject that is subjective to many users. I personally run V-Force 2 reeds. I would say just stay away from stock metal reeds. If they break they can cause a lot of damage to inside of your engine.


Kostas, are you they guy that purchased a lightweight superjet race hood from me through one of your buddies?
 
Last edited:
koftis

koftis

Location
greece
Hi oxnard111,

Thanks for the info regarding the head and the carbs. I wanted to get the head but i was worried what i will do with carbs since i do not know how to tune them in order to perform better. But i generally i have to change the carbs with new onew (stock) cause they are not in the best shape.....

I will be riding both flat water and surf one. Keep in mind though that the waves here in Greece are not the same as in US. They are big but not that big!!!!!

Anyway I will contact with Tomski to see what he can give me and the price for it. Also i was thinking of getting the starbar handlepole with the bigger straight bar in order to be able to control the ski even better.

I am not the one who got the lightweigh hood from you even thouh i am considering o f getting one after i get the pole and everything.

Where do i get the ATP Epic ignition????
 
Last edited:
koftis

koftis

Location
greece
Hi Matt,

Thank you as well for the info! I will see which impeller is better.

One of the things that i have experienced is that after i ride it for a long time and play a little bit i activate the bilge pump and a lot of water comes out from the engine area. I checked if any of the water lines have come out but everything is in place. What do you thing the water might comes in????
 
Matt_E

Matt_E

steals hub caps from cars
Site Supporter
Location
at peace
The stock hood has some holes in the very front that can let a lot of water in. You can cover those holes either with tape (temporary fix), or glass over it, or buy an aftermarket hood.
You should just keep the electric bilge pump switched on the entire time you ride.

For the ATP ignition, just google Air Time Products. They are in the UK.

I think you could just rebuild your carbs relatively inexpensively rather than buying new carbs. Changing the head (compression) will not require tuning the carbs.
 
koftis

koftis

Location
greece
I do not think that the water comes in from the holes in the hood cause they are covered. This happesn when i am riding in flat water without palying. Do you think that i have to change any seal in the drive shaft and if yes which one??
 
koftis

koftis

Location
greece
I will fill it with water but i don think that it will show me anything. What i think is that when i ride and the drive shaft is spinning maybe there is a rubber seal there that it probably has been ripped and with the movement the pressure form the water comes in. I have not seen if there is any rubber seal over there since i have never "opened" the propulsion system. So i am just guessing....

I will definatly not ride it with the hood off cause most likely water might comes in and then it will be the first jetski-anchor in the history.....
 
AtomicPunk

AtomicPunk

Lifetime bans are AWESOME
Site Supporter
Location
Largo, Fl
koftis said:
I will fill it with water but i don think that it will show me anything. What i think is that when i ride and the drive shaft is spinning maybe there is a rubber seal there that it probably has been ripped and with the movement the pressure form the water comes in. I have not seen if there is any rubber seal over there since i have never "opened" the propulsion system. So i am just guessing....
Click to expand...

You are speaking of the midshaft housing, put some water in the engine compartment, enough to cover the drive shaft completely. Look up into the intake area where the shaft comes out of the hull. If you see water dripping, you probably need a new midshaft housing.
It is possible that it might not leak unless there is some movement.


I will definatly not ride it with the hood off cause most likely water might comes in and then it will be the first jetski-anchor in the history.....
Click to expand...

Yours would not be the first! LOL
 
koftis

koftis

Location
greece
Second question.....If i want to change the cylinder head which one shall i use with stock carbs etc and what are the domes????? I am asking cause i have seen the one from blowsion and from Wamilton ( feel free to suggest any other seller) but i do not understand which dome size to use....

Do i need to change the prop as well in order to avoid cavitation if the power increases??? Silly questions buyt i need your experience and knowledge on that.....
 
Matt_E

Matt_E

steals hub caps from cars
Site Supporter
Location
at peace
You should probably get an ADA head. They are relatively inexpensive.
You want 35cc or 38cc domes. The 35's will give the engine a bit more pop, but you'll have to run premium gas at all times.
 
AtomicPunk

AtomicPunk

Lifetime bans are AWESOME
Site Supporter
Location
Largo, Fl
Do the prop as soon as you can, it is a nice upgrade even on a stock motor.

ADA girdled head with 35mm domes is good for your setup, assuming you can get 91 octane gas.

Look into getting an intake grate if you dont already have one.
 
You must log in or register to reply here.
Top Bottom