[JerryHawk250]

Originally Posted by ProDigit

Motorcycle oils are more expensive.
For the first few oil changes during the break-in, using 10W40 car oil is ok.
It's cheaper, and the clutch won't slip, but might at some point (after x-amount of miles).
For my Roketa MC 05 127, not until 1200 miles, with frequent WOT rides, did the clutch finally start slipping.

If it does, it's better to revert back to motorcycle oil.
Should solve itself after 1 or 2 oil changes.

And this is why you should use oil designed for wet clutch. It's only slightly higher than automotive oil.