650sx

Hello All. In May of 2022, I got tired of staring at photos on my dad's garage wall of him and his boys riding their Superjets, Fx1s and 650s way back in the 90s, way before I was born. After a couple of months of restless searching and nagging from my dad that I shouldn't settle for a Kawasaki...

Selling my custom triple 1100cc swapped Kawasaki 650sx! It has a lot done to it, the hull was shortened 6 inches, the hood was shaved along with part of the hall to match the hood. Tray was widened with custom fiberglass foot holds, The front of the ski was rounded, reinforced and the...

Brand-new never used SBT 650sx top end rebuild kit. Asking $275 located in menifee CA

1990 Kawasaki 650sx 750 motor with wiseco pistons ported and polished with ada head 93 fuel. Ocean pro aluminum bed plate with guki motor mounts. V force 3 reeds, mariner dual intake, dual Novi 48 carbs, prok filters. Factory pipe with Westcoast waterbox. 750 electronics, MSD enhancer, MSD...

My 650, which has had a multitude of different issues is now having two issues that are particular troublesome. 1. My ebox and starter have been replaced with new parts so I don’t think the problem is due to rust or wear. Anyway, clicking the green ignition button on the ski works just fine (a...

Sorry to post in general theres someone who wants to come buy it but for some reason its bogging at high rpm.Litterly just rode it and then I tried to start it up right after just to get the saltwater out and wouldn't start so I took the carb apart cleaned it but I'm waiting on the overflow...

Hey guys, I'm almost 21 now and have been riding my ole reliable 650sx for about 7 years now. I've ridden flat water and surf style riding on it for years and feel like I outgrew the boat. I'm able to afford something nice finally with a better job and was thinking to skip out on the superjet...

LOCATED: Chicago, IL I just copy and pasted this from my craigslist post, if you have any questions, just ask :) I’m selling a 1991 Kawasaki 650sx stand up jet ski. This jet ski is super clean for a 91’ and has no issues with it, both cylinders are at 155psi even which is very healthy. You can...

So I have been using my friends and other people’s compression testers to test compression on various jet skis over the years but I always end up getting wrong or messed up compression numbers so can one of you guys please explain to me how to do a compression test I now own my own and I would...

So while trying to sell my 650sx this guy came and when he tested the compression it read 90 each cylinder. The weird part is the ski starts right up still has lots of power (for a 650) never had any issues. So could it be a bad tester? Cause I’m assuming with 90 compression it would hardly even...

Hello all, I’m currently in the process of building two skis and just finished installing some footholds. I was in a mental debate of spray painting it or installing some vinyl. My friends dad offered to hook me up with vinyl however I need the dimensions of them. If anyone by any chance has...

Whats up guys, quick question. Where should my main cooling line be connected to on my westcoast header on my Kawasaki X2 650? There are three places to hook up to on the header, two brass fittings on either side and a plugged one in the middle. One of the brass fittings is already capped off...

I fell while turning fairly sharp on my 650sx, and got water in the engine, then proceeded to grenade the engine. Is there any reason why the water would've gotten in it?

I'm in search of a 650sx head, stock or aftermarket.

Hi, What would be the best fiberclass cloth/mat for molding a hull from scratch? Since there is lots of different fiberglass types, I need help choosing. (Weaves, density, ...) I am planning on using vinylester resin and my plug will be made of wood. Thank for your help

Is there anyone who ever put a 800 etec (150 HP) into a jetski? If not, why? I'm working on a project and have to choose between the 900 ACE HO or the 800 Etec. Thank you

Hi, I am wondering what would be the pros and cons of flat deck vs regular deck for a 1987 650 sx rebuilt project. Thank you

I think have found my bogging issue, too much water in the exhaust, Do i have the lines hooked up correctly? The line off of the pump goes into exhaust manifold, i have a tee off of the head one line running to the fitting on the headpipe near the bolts, one running to back of pipe and a line...

So i recently purchased a 1987 kawasaki 650sx. I put it on the water and it runs fine until i jump on it, and start riding it. Then it bogs right down and acts like its running on one cylinder. I have no idea where to even start since this is my first jet ski. Any ideas??

So I'm putting a 701 yamaha engine into my 650sx. I purchased the Rahass mounts and pulled the 701 out of my wetjet. I would like to sell the 650sx engine with all the electronics, exhaust and intake to someone want to swap it into a 550. Of course all the bolts, motor mounts exc will go with...