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Engine induced braking? How can that happen with a jet drive?

You have to keep the combustion temps under control or run a little more piston/cylinder clearance. Jetting full throttle a little rich of peak power will usually do it. You could finish hone the cylinder and install new pistons and be in good shape for a long time.

I would set the limit no higher than 500 rpm over what it runs on smooth water. Racers may benefit from a little more but they do a lot of bad things to their engines trying to beat the guy next to them.

RPM 9k-10K? Why so much over rev?

Maybe a Zoomie header hanging out the side?

Most small boat builders are now gone with only a few large corporate outfits remaining in the USA. Rickter took a global approach instead of a local one. Im not sure if even a not for profit hull builder located in the USA would last very long. Setting up shop in Mexico may work out best as a...

I would replace the fcv with a .100-.125" restrictor and call it a day.

The joys of tuning oversized carbs. How much spring tension can you apply to the needle before its too lean at 1/2 throttle? Finding that point may help prevent dribbling.

A little mismatched, Yamaha used an 8000rpm pump behind a 6000rpm engine. When you add impeller pitch to soak up the torque it cavitates horribly at low speeds.

Does the dribble happen while the engine is decelerating or while it’s idling? Can you make the idle lean enough by closing the lower screw?

It was designed in 1991 when the 550 was king. Then it got held back to push the blaster out first. When the FX! arrived in 1993, 550s were a thing of the past. The 550 bubble popped for everyone. Now they are being raced again, just without (new) aftermarket support.

Looks like a Rickter. We got the usual picture and price list, but no flip video?

Any ski without enough power would be crappy. I can enjoy any Kawasaki or Superjet as long as they can go around 50mph. The FX1 is strangely popular despite its horrible pump. Aftermarket hulls are often short, slippery, and throw a lot of water spray in my face. Except for the ROC, its just...

Where's the flip video?

If its bored you can see machine marks. I use either stock 62t nozzles cut to 85-86mm or Protec 61X style nozzles at the same size.

Definitely bore your nozzle, Its free thrust!

Its certainly easier to change a sprocket than it is to pull an impeller and bend it. The pump load can be difficult to place right on top of the power bubble with a narrow power band. I often have to pull an impeller and do some bending several times before Im completely satisfied. Having...

Watercraft are easier to work with than wheeled vehicles. A large enough exhaust port and a pipe with steep cones will make good power for watercraft. This is because our rpm range is very narrow by comparison. A port/pipe combination that makes a ski fun would make a bike difficult to...

The Coffmans Kawasaki "classic" and Yamaha "Sizzler" use the same mount as 1989-1995 X2s.

Buy OEM Kawasaki 650 mounts. They last about 5X longer than that aftermarket junk.