Getting ready for the riding season greeted by bad sounds....

[Fleetwood_imp]

I heard a similar noise after my first oil change to Amsoil 10w40 full synthetic.

Dumped the oil after a quick run and went with Honda HP4S Full Synthetic 10W - 30. NOISE WAS GONE AND HAVE NEVER HEARD IT AGAIN.

My guess is that the oil passages on the CB are very small and specifically designed for 10W-30.

I wonder if my dealer used 10w-30, i says it in the receipt, but they pumped the oil from a 55 gallon drum. So idk what brand, weight, or even long it's sat in the barrel. I think next time I'll just change my own oil.
So the synthetic is pretty good stuff, I thought you couldn't run synthetic with wet clutches?
NOT TRYING TO START AN OIL WAR, just inquiring information for future reference