cheers for the responses, yeh whittled it down to the mix first, added 5 litres of petrol, tinkered a wee bit, the it was going fine until it started running on 1 cylinder, then with the help of a few mates we got it down to the ht lead/ coil is duff.
But as said it was the mix that was causing the first problem
So just going to get a new coil unit /lead and try that,fingers crossed everything will be sweet again.