Complex sentence: Barbour's entered the motorcycling market from the early 1930's, with the Barbour International motorcycle suit, developing their market presence through sponsorship of the British competitions and teams in motorcycle trials.
Split into simpler sentences: Barbour's entered the motorcycling market from the early 1930's, with the Barbour International motorcycle suit. Developing their market presence through sponsorship of the British competitions and teams in motorcycle trials.