Blitz Bike: Seat won't lockUpdated 9 months ago
The issue of your Blitz Bike's seat not locking is likely due to a small screw that has loosened inside the locking lever (picture attached).
After removing the small rubber flap, you can tighten down the screw using the medium-sized Allen key that came with the Blitz Bike. It should work correctly after that.
Here's a short 90s video if you'd like a bit more detail on fixing it.