Thanks for the input, the needle jet is still there,the correct way up!
The plug is sooty, even after dropping the needle to the 1st position. I tried to order a 671 needle set, but they don't even list it in the Honda dealers here in the uk. I think the 641(b53e)is too rich, what do you think? The pilot seems pretty good now, idles well and very snappy up to 1/4 throttle. Would going down on the main (175) make any difference?
Cheers for the help