did they re jet

[Guest]

Hey Cats. This is an odd question and impossible to answer so I need your thoughts. My 1984 pop up katana has an old school Yosh header on it. Question, would it been necessary to re jet the carbs for a 4 into 1 header with stock air box. The Main Jet is factory (117.5) but I don't know if the others are stock or not. Looking to put a Stock exhaust back on it but don't want to put the carbs back on until I know all jets are stock. Thanks for you thoughts.

[hampshirehog]

Some 4-1s work better with different jets and some don't. Having said that, I'd bet that as you've got stock mains in there then nobody changed the jetting at all.

[gsrick]

Hey Cats. This is an odd question and impossible to answer so I need your thoughts. My 1984 pop up katana has an old school Yosh header on it. Question, would it been necessary to re jet the carbs for a 4 into 1 header with stock air box. The Main Jet is factory (117.5) but I don't know if the others are stock or not. Looking to put a Stock exhaust back on it but don't want to put the carbs back on until I know all jets are stock. Thanks for you thoughts.

If the main jets still stock, odds are the rest are also. Having to rejet is more of a need to match increased air flow in kind of thing, but anything is possible with POs. You'll still have to check to be sure.

[MR.G]

Thanks Guys. I'm thinking the same way. If main is stock then it's a relatively safe bet they haven't been touched. Thanks for your thoughts.