If you don't have a factory service manual you can see diagrams of your carb etc on a parts website, which shows the carb and air filter, also the pilot jet. The words 'for starters' is simply an expression meaning to use that size of jet first.

 

Pilot jet is the also called the slow jet or slow speed jet. Online parts diagrams like the one grbrown linked to above. It should show you how the carb is mounted to the cylinder head/manifold using some type of mounting plate or bracket. YD

 

NOT NORMAL. Carb should not have explosions or come unseated from the o ring.

 

It would without the retention bracket.

 

It's behind the aircleaner and mounts to the breather bolts and across the front of the carburetor.

 

As mentioned the air cleaner backing plate screws to the carburator and bolts to the heads at the breathers. Seeing that you are not in the USA, we all highly suggest you get a Factory Service Manual as well as a Factory Parts manual...

 

 

That seal is quite thin and can easily be removed, just take care when doing so. I removed my carb to do this and carefully drilled a small hole through it, then used a thin screw-driver to lever it out. There is a small brass screw underneath, which is the adjuster you want to expose. As for a drill, I used a hand-turned one, not an electric one, so that I didn't punch through the seal and damaged the screw. Also remember that the carb body is made of soft alloy and can be easily damaged, so take care at every stage! It a job that doesn't take long to do.