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Do you want more thrust, better response, or some of both? What gas do you plan to use? What is your pump configuration and are you willing to change your prop.

The 760 crank has no outside machining on the rods and has a thin sheetmetal wear ring pressed on instead of a removable collar.

For best thrust your 760 will need a low pitched prop and raised rev limit. Higher compression and light flywheel have more to do with throttle response. Find any low tension fiberglass or carbon reed.

The blaster prop is about right if the stock rev limit is used. It will be too much load for best low speed response though. Those old props are great once the boat is moving but lack the low speed thrust of newer thin hub and swirl props for equal peak RPM.

For what ever reason 760 cranks are cheaper than all the rest, always have been.

I bet those are a real PITA to keep tuned.

The secret is out, Parker just raised their price from $481 to $690.

You could use composites for evaluation and low production. Good materials are higher but the tooling is cheap.

The venturi area in relation to the throttle plate becomes very critical on larger carbs. Novi got wise and is now leaving venturis in place, thats why they work so well on everything.

Your prop is too steep for that cylinder and pipe.

Pipe tuning is actually done at the pump.

Which pipe and prop do you plan to use?

Mount it so that it will drain. Enjoy your hearing while it lasts.

Kawasaki has been using plated driveshafts and hardware since 1991.

New skis are not good deals unless you can keep them for a long time. It is getting a lot harder to find good used ones now.

Aftermarket cyl mfgs use gas operated valves for economic purposes. It is not the fastest nor most accurate method of actuation but is the cheapest. Jetskiers dont care about details like that.

The 550s would turn better. There is a video of Jacobs on a 650 beating every square nose Superjet in slolom at a Yamaha event in 1990 or 91.

They can be hard to find now but I have used Aktive and Boyesen fiberglass reeds that I found on ebay for less than $10. Both were in good shape after a full season.

The length of the leads are my only question. I just got a new 750zxi coil because it appeared to have the longest leads measuring 18"/23". My new Yamaha coil has 30" leads. How long are SXR leads?

Or better yet, put $40 in your pocket and restrict the stinger to around .100".