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The same shops have modding the same engines for the last 20 years, do you really think one is going to be much better than another.

Small pin pistons will not fit a big pin crank.

Depends on which WetJet manifold you have. If it looks the same as the one on your Superjet its because it is the same part. The WetJet Kraze manifold takes a unique SBN46. People naturally think its better because its bigger whether it is or not.

You made the mistake of changing more than one thing at a time. Learning to tune is a slow process depending on how much time, money, and desire you have. Fortunately watercraft are a lot more forgiving than a wheeled vehicle. A "bad" port job will usually run well enough with a good pipe and...

The old 650 hull can go fast and is the easiest to ride in a straight line. Im planning to install a Yami 1100 and 155 pump in one, just so I can blast around on cheap gas.

There are never very many viewers in the sub forums. A ski is a ski, you will learn more and get better ideas with all the information lumped together. This may not work very well since most riders have narrow focus and tend to move on before they get much experience.

You cant shorten them very much before it hits the hood. I cut mine in the middle and removed 1.5 without hood contact. You can also make or adapt a turn plate that moves the bars forward, I did both for -3.5".

Use the lowest pitch you can find and raise the engines rpm range. Like I said earlier, "there is no such thing as low end with a stock FX-1 pump".

The old props work OK once the ski is moving but not out of the hole. A Concord or swirl will make more low speed thrust. The 3 inch (C-75) magnum style hubs are better in white water.

There is no such thing as bottom end with a stock FX-1 pump. They can work somewhat well over 20mph in glass smooth water. Yamaha copied the most popular race setup at the time (550 with a 440 pump) and then installed a low rpm engine and cranked up the impeller pitch. High pitched props need a...

Sounds like you forgot to install the muffler.

There is light weight expandable foam that is waterproof, surfboard makers use it. All of the stuff that I have tested is MIL-Spec and too expensive. Im sure some of these vendors offer a comercial version. Try searching for "Steppon" foam.

Maybe someone should make "magnum" footholds for the guys with big ones.

Dont expect a state to willingly allow replacement hulls, registration is how they make money. The government will eventually wise up to aftermarket hulls and start having cops impound ones with a Kawi or Yamaha HIN. An airplane is about the only thing that is not titled by a state and can be...

Thats probably a good idea. I have noticed over the years that riders develop very narrow focus toward whatever they like doing. Many come here for information and ski setups vary greatly with venue.

Moving the bars aft does more good than adding a lot of up trim.

You are probably too lean in the pilot/popoff and overpropped. Either of these by themselves or combined will cause exactly what you are describing.

See if it will get rich enough with the top screw three turns out, if not get a bigger main jet. A 115 pilot may work if the popoff is low enough. Listen to the exhaust at 1/4 throttle, make it sputter a little. The kawi 650 does not pull vacuum like a 750 or a Yamaha. This means that all carb...

The keel needs to be flat all the way up or it will want to hook into turns. Get rid of the bulb or else put a 15mph speed limit on it.

Open your top screw a turn and see it gets better.