Mineral, Semi Synthetic or Full Synthetic for our machine?

[Camshaft]

I have used semi ester Belray 10W40 for my first oil change on my 01 with 57,000kms. The guy I bought it off owned it from 1 year old, told me he used full synthetic all his ownership and tracked it 10 times in the year before he sold it (put the left peg through his calf poor bastard dodging a possum on a wet night).  :'(


Is this a suitable oil for my bike being used as a commuter plus the weekend blast finding the redline a few times?


I'm sure there are plenty here with similar riding week to week