Complex sentence: This is not an easy manouver because the bike now is very biased as to which side it wants to fall over on to and you will need to concentrate on keeping the wheel off the ground and countering the sideways balance.
Split into simpler sentences: This is not an easy manouver because the bike now is very biased as to which side it wants to fall over on to. Concentration is needed to keeping the wheel off the ground and countering the sideways balance.