Oh I havent given up yet Brian
I appreciate your suggestions, when it does get going it really flys along the road so perhaps sombody has been ‘at it’ although a few good men have seen the barrels and did not say the porting looked radical.
(For once in my 2 wheeled careeer speed is not that important!)
I have been here with other machines by the time you find the obsure reason and it works correctly you have renewed and checked everything and you end up with a well sorted bike
(Well thats how I will console myself) I will keep you all informed
