Complex sentence: After a largely unsuccessful 2000 he switched to the Superbike World Championship for, without winning a race although taking three podium finishes and 8th overall, choosing to retire at the end of the year.
Split into simpler sentences: After a largely unsuccessful 2000 he switched to the Superbike World Championship for, without winning a race although taking three podium finishes and 8th overall. Okada chose to retire at the end of the year.