1990 550sx(i)?

[Slammeds10]

Hey guys I just signed up with this site and am very new to the stand up skis. My knowledge and experience of these is very little but growing everyday. I’ve been reading on here for a few days and it’s been amazing what I’ve learned so far
So I bought a 1990 550 that was water ready. It also came with a parts machine that is the js300 as well as a few parts. I was hoping maybe you guys might know what machine these are for and perhaps the value.
As for the 1987 js300, it is missing the fuel tank but looks complete otherwise. Any idea what these typically go for running?
The 1990 550 I originally thought it was a js, but figured out it was a sx. On the front of the hull there is a decal that says 550sxi. I couldn’t find any info, so perhaps that isn’t correct? I was hoping you guys might be able to confirm it is the piston port engine that came with it originally. Any info you can give me would be much appreciated. When I look for parts for the engine, any js up to 1990 will fit?
I live in southern Ontario, Canada and having trouble finding parts in Canada. Kijiji and Facebook market place are very limited so does anyone know any good places for new parts in canada, as well as possible used parts like engine, jet drive?

 

[Mike W]

1990 was the last year of the piston port motor and first year for the SX (rear exhaust). Post a picture of the inside where the driveshaft comes through the hull as well as the rear of the ski, more specifically the rear exhaust.

 

[restosud]

yeap! your 1990 sx hull came with the piston port 550 engine.

 

[mikidymac]

Also there is no such thing as a 550 SXi, it's just some aftermarket decals someone had made.

 

[Big Kahuna]

You have a Butches / Westcoast Exhaust there. (Red Pipe). It is a good pipe, but I would not use it unless you get your cylinders ported.