i just purchased a 1986 tomos golden bullet(now called the targa)
it takes forever to start and even longer to idle. when you roll the throttle back it seems like its trying to die. i was wondering if maybe it would need rejetted. its completly stock with almost 1490 miles on it. im thinking about getting a performance exhaust for it too. when i get the exhaust what jetting do you think i should switch to? what jet do you think i should get without the pipe?im getting my moped license so i need this to last me for a good two years untill i get my drivers license. do all jets have the same screw size?

this is the pipe (bottom one)

ps- can somebody please give me the link to a rejetting video site thanks