L Leonanamilena CB750 New member Messages 1 Reaction score 0 Points 1 Location Elizabeth, nj Jul 30, 2013 #1 Hi guys I'm new here, I have a 1972 cb750k and I wanna replace the original exhaust with Mac 4 into 2 , do I need to change the carb jets? I have the stock air box
Hi guys I'm new here, I have a 1972 cb750k and I wanna replace the original exhaust with Mac 4 into 2 , do I need to change the carb jets? I have the stock air box
dirtdigger Moderator Staff member Top Contributor Messages 3,781 Reaction score 282 Points 83 Location US Jul 30, 2013 #2 More than likely yes but you wont know until you ride it and see how it runs and how the plugs look.