[Kawasakian]

These are usually easily rebuilldable, but you have you get it right, or you end up with an engine full of gas inn the crankcase. Worth opening up though. Use the right size screwdrivers so you don't buggger up the threads, in case they're tight, they usually aren't.

 

[Kawasakian]

If the screws were stuck you could use Vise-Grip pliers to turn the heads, as the petcock being off the bike gives you good access.

 

[Kawasakian]

I kind of thought so. I'd get the O.E.M. one and make yourself remember to shut off the gas. I wish I could shut off the gas on my bikes.