Hello I have a 750 LTD. I´m not a mechanic by any means. I´m have a few problems with the bike here are the symptoms: the bike runs out of gas very fast like it´s running rich. there is a gas leak coming out of the gas switch. I think the main problem is in the carburetors. do the need re jetted? sync? or what? how do I go about these processes. need help.