Those instructions do not apply to any 4-stroke gearbox that I know of. Those instructions apply to the 2-stroke engine.Ok ....But all of the kits I have been looking at say the come with "Push button clutch lever (for easy pedal clutch lock out)" with instructions that say to pedal up to 5mph before releasing the clutch lever. I have done a lot of Cent clutch motorsports and have never seen a lock out for a Cent clutch.