What size socket/spanner do i need for this? its bigger than a 32mm as thats the biggest size ive got.

basically my head race bearings need tightening up/replacing as the front end wobbles under braking. i have tightened it up a bit by tightening up the c-spanner nut under the top yoke with a chisel and it made the problem less severe.

41mm dude

excellent, cheers matey.