Can any body tell me how to take the cylinder head off the sy? I've striped bike down rad off ECT the head steady is stoping the head coming off I was hoping to get away from taking the motor out is there a nack am I missing something? I want to replace the small end bearing am not new to striping and rebuilding bikes just never done a scorpa before I have the New parts to hand to do the work so frustrating. Cheers