650sx build by: my650sux

[Joe Dart]

Well it's not the most beautiful thing in the world but it will do.

 

[Joe Dart]

The pole is minus 3 inches and the straight bars (non 15° factory bars) are minus 2 inches. I haven't drilled the hole in the front or cut the holes to run cables yet. Oh and I still need to make a chin pad and spring set-up.

 

[speedysprocket]

Didn't see anything about lightening your 61x flywheel... Let me know if you want to do that why the ski is still a project. And an ambitious project at that!

 

[Joe Dart]

@speedysprocket will a lighyer flywheel make a big difference? The only experience I have with light flywheels are on turbo hondas, makes pulling out hard with a puck clutch due to the lack of rotating mass. I also own a kx125 and when ridding trails the engine is either on or off. Maybe because of the slip between jetpump and water it wouldn't be as bad on a ski. Let my know your thoughts and cost estimate on machine work. I suppose you would have to turn it down on a lathe then balance it.

 

[speedysprocket]

@speedysprocket will a lighyer flywheel make a big difference? The only experience I have with light flywheels are on turbo hondas, makes pulling out hard with a puck clutch due to the lack of rotating mass. I also own a kx125 and when ridding trails the engine is either on or off. Maybe because of the slip between jetpump and water it wouldn't be as bad on a ski. Let my know your thoughts and cost estimate on machine work. I suppose you would have to turn it down on a lathe then balance it.

I do a lot of them and never a complaint. There's not really any benefit to having excessive rotating mass in a jet ski drivetrain. I charge $65 and includes balancing, paint, and return shipping. Send me a message if you're interested.

 

[Vumad]

I have a #0 flywheel. Can't say I noticed a difference. I'm very picky about my power band so I can say it didn't mess up my rev. I hated my KX125. I like a linear power band. Love the 4-strokes. Very please with my superjet.

 

[Joe Dart]

So I decided to make a rear exit exhaust and the versa-plug drain all in one pinch through hull fitting. It will be installed from the rear then the couplings will pinch the gaskets and keep my foam dry.

 

[Joe Dart]

I got the through hull exhaust and versaplug drain in tonight, it's the first fit check not my final product.

 

[Nottjbarlow]

Damn I need a tig so i can get back to fabricating again..... you got me jelly af.

 

[Joe Dart]

@Nottjbarlow I don't know how close you are but if you need to weld something sent it my way or use my stuff.

 

[Nottjbarlow]

@Nottjbarlow I don't know how close you are but if you need to weld something sent it my way or use my stuff.

Man thanks a bunch, Im in SWFL... quite the drive to Tennessee

 

[Nottjbarlow]

Question... why is the turn nozzle cut like that?? Is it to clear the tray or something?

 

[Joe Dart]

It came that way, must have been made from the factory to clear something.

 

[Nottjbarlow]

Word...

 

[Joe Dart]

Hand pole and trim set up and working video

 

[Joe Dart]

Here are some pictures of the mount/ adjuster I made for the steering cable. I used stainless brackets that I stripped off the wetjet before taking the hull to the junk yard.

 

[Joe Dart]

so my project is moving along nicely. I just need to measure and shim the motor, finish the jacketed pipe and have another go at the waterbox. I think I'll have it running in a day or two. I'm thinking about pulling all my stickers off and putting them on my yeti so I can paint this thing. I really should have waited to turf it.

 

[Joe Dart]

I have finally started working on my pipe again. Last night I welded the doughnut flange to my expansion chamber. It's offset downward at a 15 degree angle so that it has plenty of clearance and will run right into the waterbox. Keep in mind this is only the inner layer of the jacketed pipe, I will be putting another layer over top of this one with and air space in between them. This will be achieved be building up the welds and breaking up another belt and cone 1/2" larger in diameter than the inner belt and cone.

 

[SkiDiggity]

I wonder what kind of power that thing is going to make. It's huge! Great work and keep it up!

 

[Joe Dart]

I did the math months ago and that's what I came up with for size. I figure it's easier to make it smaller than larger. I'm not sure what kinda egt's I'll have with the dry pipe, the hotter the faster sound travels.