jetting is a term that describes carb fine tunning. it´s called like that because you have to change pre-metered jets to diferent ones in order to suply the needs of gas in engine.
second position means the second clip position from top notch. this clip will alter your bikes jetting, roughly from 1\4 throttle to 3\4 throttle opening.
now, you have in the right side of the carb (stupid side to put it!!) two screws. the bigger one is what controls the idle speed, the other controls the mixture air\gas when idling. i usualy set both this way:
close the mix screw tottaly (clockwise) and back it 1 1\2 turns out! thats what it means... then open and close that screw with the engine runing until the idle is higher. after that just close 1\2 turn and thats it... then, just fine tune the idle speed screw until the bike just idle. :cool:
to check if the head gasket is leaking, start the bike and open the radiator. not apart, just take the cap ;)
now give some snapy gas and check if the water on radiator makes bubles, came out or just make a jet of water... all of this is difficult to recognise. it should just make a powerfull jet of water.
hope this makes any sense to you... it does not for me :whoa: