I switched from 927 to Lucas semi-synthetic a few years for availability reasons. Now that I have checked a few top ends after extensive use I can say I really like this oil. Bores all look perfect and ring wear is just like any other oil I've used.
On the Golden Spectro, I ran that in my street RD250 and RD350's back in the day and they saw lots of hard miles. Never had a problem with it.
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