ok dude i hope ur gonna got something from my terrible third language the plug ur searching is downward side of the engine at the left side (the side where the gear shift and the chain are ) just look down at this side its metal size is around 19 if iam not wrong just follow the gear shift move down it and forward a little bit it may appear to u hope u got something <!-- s --><img src="{SMILIES_PATH}/icon_biggrin.gif" alt="" title="Very Happy" /><!-- s -->
Engine --> bottom of engine is sump --> bottom of sump is sump plug. For starters it's on the left hand side, so if you start looking around where your sidestand meets the frame, it'll be just under/behind that if i recall. As Jad said it's usually ~17-22mm head and it's quite often got a small phillips head screw type thing on it aswell. Don't be fooled and try and remove the screw, it's only there to make unscrewing it quicker.