JASO because the starter has wet clutch. I found a little comment in the owners manual. I’m just running Pennzoil 0W30. No issues. Not too concerned.
A little late to the party but I have been running Mobil-1 0W-40 European Formula in my 08 Vector since I purchased it in 2010. A year from now or next spring, I will be switching to your brand in Pennzoil 0W-30 as well.
Not that I've had bad luck or anything with the Mobil but I like Pennzoil products better and have been running them exclusively for quite a while now in all my other vehicles. (I just used up my last bit of Mobil this spring)
Curious, what are you guys using for filters? Since 2010 I have been using Hi-Flo filters, a HF-147 to be specific. Rumor has it these guys/company make them for Yamaha anyways. Same with Yamalube, Yamaha does not have its own refinery.