I have broken in a few V-specs. You need to get them good and hot before you try to crank them. I usually shoot for at least 180. And your going to need a higher idle for the first couple tanks. After a few tanks it will start to loosen up and it will need a little less idle to keep it running. Make sure you keep the temps up while running the first few tanks. It has been cold here so I wrap tin foil around the head to keep some temp in the head.