straight pipes

i have a 79 kz650. im running my pipes straight into one. does anyone have an idea on what size jets i should use?

what type of exhaust u fitted .. a lot of 4 into 1s ie harris etc dont require re-jetting ..

What alterations have been done to the air filter assembly?

SCHWACKS wrote: i have a 79 kz650. im running my pipes straight into one. does anyone have an idea on what size jets i should use?

One what?

thanks. gonna run the stock pipes, (4) and weld on a pipe so it goes into one pipe? am i wording that right? i did a rebuild kit on all carbs and put in 102.5 jets? I dont even have the motor in the bike yet!

SCHWACKS wrote: thanks. gonna run the stock pipes, (4) and weld on a pipe so it goes into one pipe? am i wording that right? i did a rebuild kit on all carbs and put in 102.5 jets? I dont even have the motor in the bike yet!

I don't know what jets to recommend. I know you will spend a ton of time trying to get it to run and it will never match the needle taper. Straight pipes never run right over the full range.