about every 4 track days, sometimes 5 (same time I change tires and bleed brakes) or 2500 miles, whichever comes first since same bike does double duty. I use repsol full synth, and an oem filter.
also fresh filter and the cheapest motorcycle specific oil I could find before it goes to sleep for the winter. when it comes back out, oil change back to the synth, but keep the same filter
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