Good info. I'm curious, what oil did you use for the oil change? I'm coming up on my 500km service and am thinking to use Silkolene 15w50... Also, did you replace all the rubber o-rings (filter cover, drain plug filter basket and drain plug cover)? Any idea what is the required torque for the drain plug cover? Cheers
Never ask what oil anyone uses, as you will unleash a torrent of replies all claiming that their choice is the best. Just buy a quality brand, based on your own research, of a full synthetic oil, one made for use with a wet clutch. That last point is important as wet clutches do not play well with any oil labelled as "energy conserving". Best way to avoid that pitfall is to simply buy a motorcycle specific oil. If you can afford having a toy like a motorcycle, you can afford the extra expense.
I didn't replace either of the two o-rings, the strainer cover or the filter cover, even though I had the filter cover o-ring on hand. Both were in fine shape for re-use. I was unaware of the actual drain plug bolt when I did the first oil change, so next time I won't be bothering with the mess involved with taking off that strainer cover. The strainer was clean upon inspection.
I just tightened it all by feel and all is well. You just need to be compressing the o-rings to create the seal and that doesn't require gorilla hands.
As to the actual drain bolt located on the front right of the crankcase, it appears to use a copper crush washer, but aluminum could be used there as well, unless you have a torch to anneal the copper washer with, allowing multiple uses gf the same copper washer. I don't have a torque spec for that bolt either, but again, I never use a torque wrench for oil changes.