Hi axistr, thanks for the reply....pretty sure we're on another forum together too!
The carb is a vac secondary type.
I had a look at the linkage on the accelerator pump and its on the lowest setting already. I did have it one hole up higher when i first installed it but moved the linkage which made it slightly better under load.
The dissy is new and is an electronic dissy....so hopefully its all good there.
Its rich at idle, but according to mates doesnt really blow smoke until i "get up it"....eg overtaking on the highway etc.