Hold the bike upright (as if you were sitting on it) when draining & checking fluid levels.
http://www.bikebandit.com/parts/
Go to - your bike - Crankcase
Remove drain bolt (underneath the engine # 92066B) and drain the oil.
Re-install the drain bolt with a new sealing washer if necessary.
Remove the spin-on oil filter - Location is rear of engine, right side, near the bottom # 32033.
Clean and dry the crankcase before installing the oil filter.
Dip your finger in fresh oil and wet the o-ring of the new filter.
Install the new filter hand tight (very snug).
Go to - Engine cover
Remove fill cap (right "side" of engine # 16115)
Fill with quality, brand name, 10W-40, motor oil until the oil covers 1/2 - 3/4 of the oil level window (Go to - Crankcase, right "side" of engine, near the bottom, # 52005) - remember, bike upright.
Install the fill cap, start and run the engine for a few minutes - to allow the oil to circulate throughout the engine and fill the oil filter.
Stop the engine and let it sit for a few minutes - to allow the oil to settle to the bottom of the crankcase.
Re-check the oil level - add or drain oil if necessary.
Go to - Drive shaft
Remove drain bolt # 130 and drain the final drive.
Install the drain bolt.
Remove the fill cap # 16115
Add 80w90 Hypoid Gear Oil until the level is even with the bottom of the fill hole.
Check for leaks, re-cycle the oil and ride!
