Loose Crank Arm Problem

+1

Take of the black plastic dust cover with the two holes - use any old thing to get if off like a knife or pen stuck into one of the holes and gently tap it around with something else like a rolling pin or book.

Under this you will see a crank bolt or some description - tighten it up.

DO NOT RIDE YOUR BIKE WITH THE CRANKS LOOSE LIKE THIS, EVEN TO THE BIKE SHOP !!!

+1

Remove the black dust cap with a pen / nail and do up the bolt inside. Usually a 15 mm sometimes a 14 mm socket will do the job.

Do not ride this bike even for a short distance or you will require a new crank.