Not in my book, Release it completely and go like hell.Have you ever heard the phrase "ride it like you stole it"? You have to be a bit brutal with the clutch on your launch. Slow your release to the point that the engine does not lose RPM's. It's hard on the clutch discs but good on the 60 foot times. Your track must be really sticky to completely stall the bike on a launch so you may end up 2 bike lengths out before you've fully released the clutch.