jet size?

kz900, air pods, vance and hines 4 into 1. what size jets do i need. thanx

with the baffle left in. thanx

Original KZ900 carb jets may be okay with existing set-up.

Would rely on plug readings after high speed throttle chop (simultaneosly cut ignition and disengage clutch), to indicate whether any main jet changes should be considered.

Shows what's actually going on inside combustion chambers at wot where main jets are ruling the roost.

Remember the story where all the experts were researching and debating about how many teeth are in a horse's mouth. Until somebody just opened a horse's mouth and counted the teeth. The plug reading is like counting the teeth instead of just prognosticating about the number.

Good Luck!