HI - I'm still working on my motorcyclopedia project which has grown to an enormous 2 (yes two!) articles. I spent most of the last week trying to master this 3D animation software and I've more or less got the hang of it. My 4 stroke engine animation only took me a few hours, but that four hours came only after I spent all week just trying to get the basic skills together. Anyway, people are welcome to have a look at the articles and to make comments/corrections. Please remember they are aimed at absolute novices, and not the learned elite of aus.moto. Engines - the basics. [URL]http://www.motorcyclopedia.com/DesktopDefault.aspx?tabid=27&mid=336&site=41&[/URL] parentid=54 Torque [URL]http://www.motorcyclopedia.com/DesktopDefault.aspx?tabid=27&mid=336&site=67&[/URL] parentid=77 If the links fail due to formatting, just go to [URL="http://www.motorcyclopedia.com"]www.motorcyclopedia.com[/URL], click on 'Motorcyclopedia' and click on "How">>"How Bikes Work. Cheers Manning