how to line up the chains

as said above im getting both chains changed but how can i tell if they are line up correct

with the cam locking tool
or by eye 🙂

so buy the tool put it on then take the chains of one bye one

Or an even easier option is to get the man above to fit them for you 😉

theres marks on the sprockets and coloured links on the chains, so just line them up. or get carl to do them/help you.