Depends on what's out of sync and by how much.
Usual symptoms are one cylinder not idling (that side's valve is closed too much and doesn't allow air in) or a hanging idle. Blip the throttle and if revs are slow to come down, then it's probably a sync issue.
Though it's minor, you're also putting a bit of stress on the engine components as one cylinder will be working harder than the other. And you're usually robbing yourself of a bit of power, too.
Usual symptoms are one cylinder not idling (that side's valve is closed too much and doesn't allow air in) or a hanging idle. Blip the throttle and if revs are slow to come down, then it's probably a sync issue.
Though it's minor, you're also putting a bit of stress on the engine components as one cylinder will be working harder than the other. And you're usually robbing yourself of a bit of power, too.