From the website:
Although we recently rereleased our German Motorcycle, it has caused us some problems due to the number of parts involved – something you said you would rather see reduced. So, taking that feedback on board Wojtek has revamped the models!
The new motorcycle is now a single casting rather than several. Wojtek has also taken upon himself to produce new riders, including a pinion passenger! As you’ve come to expect, these have separate Figure Heads, so you can chop and change as you build your army to your preference.