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I'm looking to do the same thing to my fx. I think I need a type 4.

The seal with the 4 tangs on it to the back and facing out

put the rear seals in the right way around

Depends on the condition of your compression gauge

Win with that comment

That 650 was something awesome. it was a huge 55hp

I remember when you werent allowed to race a superjet as it wasnt homologated. They let in them in one year and they cleaned up every class except the 550 class

Yes will be fine. More crankcase space is a good thing

I'm talking in absolute not in vacuum cleaner salesperson speak. This is why on a car we have a map sensor. Manifold absolute pressure. It's about pressure differential this is what makes the fuel flow from one side to the other. This is why a smaller carb is easier to jet. It has a greater...

It's not a sucking or vacuum. It's a pressure difference that makes the fuel flow. The fuel wants to go to a low pressue inside the carb. What causes the high pressure inside the fuel bowl. It's a small round black piece of rubber that has air pressure on the out when enough fuel is pushed...

Ok your right sorry. Have a great day

The difference in pressure between one side of the diaphragm and the other side effects your pop off pressure. If you have reduced pressure in your tank then you have reduced pressure on one side of the diaphragm. The fuel pump adds to the pressure thats already there

Open your tank when you pull up at the beach does air go in or out. Have a look at the diaphragm on the other side of the carb. That is open to atmosphere

Sure ok. when the fuel is under pressure in your fuel tank it increases the pressure one side of the diaphragm in the carburetor. The other side is open to atmosphere pressure the difference, while there is still pressure on the diaphragm when the tank is open to atmosphere it is less and it...

When you have no pressure in your tank it runs funny. You can tune it out to run fine. But when you fix the pressure issue you have to retune. So most people here are right. Their ski could run just fine with no pressue. My hx800 ran with no tank pressure. The change in the URL pressure because...

Your not getting rid of the heat fast enough that's why it did a 4 point seize. opening up your squish that much lowered the thermal efficiency of your ski and will mask the issue that your engine was suffering from.

unless you went to high and broke through to the water jacket nothing you have done there will cause you an issue.

Still have the best signal out of any carb out there

Fully floating timing curve . Trick

Yes really. Even groupk got there hammer to do 57-58 on a ported 61x cylinder