Answer to "gas line top or bottom on gas tank"so yes it does matter. as said, one is the main line, the other is for your reserve. the easy fix is see how it goes. if you get it wrong the fuel tap will be on reserve when it says "on" and will be on "on" when it says reserve. unusually there is not an "off" for the fuel tap. would be useful if they'd have put one in at the factory.
Answer to "Stuck Throttle Cable"yes that sounds like what was required. for anyone else with the same problem of a stuck throttle. (it is a common problem too) the little brass cyclinder should be installed with the biggest,longest gap that runs from the top of the cyclinder to the bottom of the cyclinder- facing the right hand side of the bike. that is to say that the sleeve can fit into the carby two different ways, however only one of those two ways will correct the stuck throttle problem. easy once you know how :-) Update: oh and by the way the needle has 6 little notches on it. the single C clip holds the needle at a required position, which can be adjusted as required. ie. lift the needle up and it will make the engine run richer (more fuel goes into the combustion chamber). drop the needle down a few notches andnit will run leaner. this helps the motor perform to its best ability in various heights above sea level.