im leaning more towards the woodruff key being broken, due to improper installation.
i will have to strip the front down and have a look! JOY!
ill post more pics as i take stuff apart, i did notice that the gear on the oil pump/dizzy shaft was quite worn, i imagine that it could potentially slip, either way i think that some disassembly will enlighten me on my problem. i hope my crank is ok =]
thank you for your replies.