If you just got the bike and don't know the history, I would do a complete oil change, which involves 5 drain bolts. It's a pain in the a$$, but if you do it now, you can do your future oil changes using the 2-bolt change. When you get the manual, it will show the locations of all the bolts. If you do a search on this subject, you will see that these other 3 bolts only get about .1 liters of oil out. But if you do it once, you will be good for a long time. I do a complete change about once a year. The rest of the time I just do the frame and lower bolt. Remember to change your oil filter
and clean the air filter.
The 426 is a great bike.
Keep up your basic maintenance and you will be a happy rider.