There is a "how to" on here with pictures and everything (and I suggest you use the search function and find it because it's handy) but I can give you the low-down quick.
Remove the 4 phillips head bolts from the oil cover, and clip the two hoses off the oil pump, and pull them back out through the rubber plug. Flip the plug over and trim the bit of rubber hanging out off with a blade and fill the two holes up with clear silicone.
Drain the transmission fluid and remove the right footpeg and clutch cover. Flip the cover over and pop the "e-clip" off the delrin gear. Pull the gear up and remove the "pin". Replace the clutch cover gasket if it tore and reinstall the clutch cover and footpeg. Remove the oil tank, oil lines, and tape off the oil level sensor wires (they're hot off the lighting coil so they need to be taped up)
Locate the nipple on the right side the carburetor throat where the oil injection went in and fill it solid with RTV silicone. Most recommend a vacuum cap but a proper filling with silicone I've never had a problem with it and finding a tiny vacuum cap to fit that nipple is difficult.