XR200 oil change HELP

[smitch]

I just bought a 97 XR200 and dont have a manual and need to change the oil. I am not sure where the drain plug is?? Can you help?? Its not on the bottom of the engine like the XR100 and the XR50. So i am not sure which bolt is the drain plug, can anyone help?

 

[Patman]

Left side crankcase at the bottom. Should be a large "bolt" with a spring and screen behind it sealed with an O ring so check it carefully.