In the UK, standing up on a motorcycle while it is in motion is generally not illegal. However, it is important to note that it may be considered dangerous or careless driving if it leads to a loss of control of the motorcycle or if it puts yourself or others at risk.
The Highway Code in the UK provides guidance for safe riding practices and states that riders should maintain proper control of their motorcycles at all times. This means adopting a position that allows for balance and stability, especially when negotiating bends, corners, or other potentially hazardous situations.
While standing up on a motorcycle may be necessary in certain circumstances, such as navigating rough terrain off-road or absorbing impact from bumps or jumps, it is generally not recommended for regular riding on public roads. Remaining seated with both feet on the footrests provides better stability and control over the motorcycle.
It's always important to prioritize safety and adhere to local traffic laws and regulations. It is advisable to consult the specific laws and regulations in your jurisdiction or seek guidance from local authorities to ensure compliance with the applicable rules regarding motorcycle riding.