I use Motul 5100 10w40 (which is the same as Yamalube at the dealers). Always have done. Nearly 40K miles now and not a hint of a problem.

Coolant is more of a minefield. You must avoid anything that contains silicates or borates. Look for stuff that says either "organic" or is clearly labelled "silicate and borate free". Anything with silcates/borates in will quickly ruin the mechanical seal in the water pump.

I use Motul Motocool "Factory Line" Organic+ (which is also the same stuff as Yamalube). Make sure you do not get tempted by Motul Motocool "Expert", that is not silicate free!

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