Bout the same thing here, what I been using cause it was the first I found locallywhat Driveline Performance recommends for their clutches, and I've been using with great results for 3 seasons now......
Mobile 1 full synth 4T 10w-40, available at most auto parts stores and wallyworld for around $10
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https://mobiloil.com/en/motor-oils/mobil-1/mobil-1-4t-motorcycle-oil