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I remember 30+ years ago all the parts houses would sell you a 16 degree impeller saying it was better. I guess lugging the engine down below 6000rpm would work well with the small carb. At 6600 the CDK2 38mm was better, about as good as I could get from a pump gas limited. After that we used...

Make sure the tank is venting.

Thats true, the strength of composites come from the fiber, or to a much lesser extent the filler in the resin. Some cheap low temp epoxy will get soft over time, especially when oil gets on it. "Good and cheap" epoxy is hard to find.

It seems like many riders are staying in their footholds all the time. It may work for you, If not then try some full length slots so you can stand anywhere in the tray and still hold on to the ski.

A Mikuni SBN44 is on the large size for a reed 550. Im sure it will work as long as the rpm is high enough. You need to already know how to tune a carb before the "I need a bigger carb" game is played. If you ever have to ask others what jets to use then master tuning your Keihin first.

All the aftermarket lithium powersports batteries are LiFe because LiPo is too dangerous. Jetski riders tend to have problems with them because they are a little too small for the task at 3lbs. LiFe should weigh 1/2 what a reliable lead battery weighs.

I said the same thing in 1990 as far as low power and poor hookup. I think their goal was to make a ski that anyone could get on and never fall off. And one that floats when someone swamps it. Their big selling points are the gas guage and the little kid power limit. I don't know any...

TCW3 could easily be a better lubricant but it would smoke more. The other specs like JASO are for air cooled applications. The main priority is making less smoke while maintaining as much lubrication as we had in 1970. A 40HP 125cc race engine needs better oil, everything else is fine on...

A large company cannot change its products fast enough to keep up with the whims of customers, especially young ones. Making a standup that a fit and experienced rider wants would leave most of the actual buyers frustrated on the beach.

I just finished my last $6.99 gallon of pre-Obama oil.

Not the same as R50. Seems to be very similar to all their other gasoline only formulas.

Its funny how jetskiers have an OMG moment when they see an old one that hasn't been neglected or destroyed.

It has nothing to do with the engine type. Yamaha designed this Superjet as a rec ski using parts at hand. If it was a race ski it would have been at least as good as the Kawasaki is.

Thats an early 9-17. They are about the right load and run smooth. Use a 650sx nozzle with that impeller and you will feel the ski pull harder. The old skat props were hard on splines since they used an O-ring for a seal and very few riders though about sealing them up.

All Superjets are relatively long and will handle riders over 6 feet tall and 200+ pounds. Small riders can shorten them up a lot and still get them planed easily. Start by shortening a stock rideplate. You may need to shorten the pole when you figure out what you want.

Fuel mixture requirements will almost always vary between cylinders. Kawasakis hot cylinder is usually the front. Its a little time consuming but always start rich of peak power and lean each carb until either rpm stops increasing or throttle response suffers.

The 90-07 Superjets are better if you aren't trying to race. They get even easier to ride if you take out some of the rocker thats built into them. That will reduce their hunting tendency.

How much is a new one?

The more civilized riders know they can just use a VERY quiet muffler and have NO power loss! Remember this applies only to tuned pipes. Any backpressure will act as a throttle with untuned exhausts.

It will probably help wake up the pipe a little.