Im trying to get the engine out of my zx6r 97, and ive come to remove the front sprocket. Ive folded back the locking bit however i cant get the bolt to move at all. Ive had someone standing on the rear break and holding the bike but still nothing. I don't have any air tools. I need to get the engine out so i can have the frame looked at. Is there any other way to get the chain off, any suggestions?