Help! 1983 kz750 ltd rejett question!

Hello! I have a 1983 kz 750 ltd 4cyl. I just bought it and I love it! It ran perfect when I got it and is nearly mint condition. I just recently took the stock baffles off and dumped straight pipes under the bike. It sounds great but right away I noticed it didn't want to start unless full choke is applied now it also doesn't like to run very well until it has been warmed up quite a bit. The question I am asking is what to I need the rejett the pain and secondary to too fix this problem? Also ware do I find these Jett's!? Thank you for reading any help leading to my bike running smooth with my straight pipes would make me the happiest guy alive

Hello! I have a 1983 kz 750 ltd 4cyl. I just bought it and I love it! It ran perfect when I got it and is nearly mint condition. I just recently took the stock baffles off and dumped straight pipes under the bike. It sounds great but right away I noticed it didn't want to start unless full choke is applied now it also doesn't like to run very well until it has been warmed up quite a bit....

It ran great before, but now it runs like crap. The solution seems pretty simple --- put the stock mufflers back on.