If it had a Quickstart feature I would need to disable it in order to time it.
Yes both carburetors are closed at idle and open fully at full throttle without traveling beyond and are in sync with one another. There’s about 10,000s of an inch gap between roller and cam at idle.There is no ---" quick start " ----On an 86 model motor.-----Make sure both carburetors are CLOSED at idle and that they both open at the correct time.