Help with carb please , setting

[Mercmancdi]

Engine 1969 minor 1098cc was running when got it but not great so lots new parts fitted so had to replace choke bracket ,before it was stopping after about 3/4 hr running started later on in the day drive into garage fixed choke , took plugs for compression there were pure black soot , I put new condenser in and new rotor arm after fixing choke , it started drive out of garage reving bit high
Then I stopped and screwed the needle nut , ( silly ) now it starts for a second and dies pulled plugs out they are black again. Where do I start to get carb set right I know nothing about old carbs to be honest apart from idle screw etc. is there an adjustment I can start from and work from there. At minute I have idle screw fully off choke is opening and closing nice and tight. ( There’s a good spark at plugs .)
Help be appreciated, trying to get her driving right before I spray it. Thank you. Treat me gently as said don’t know much about old carb.

[chrischris59]

Visit this link Burlen make and supply su carbs and parts with free downloads about carbs. https://sucarb.co.uk/technical/category ... rburetters

[Mercmancdi]

Thank you.

[Davemate]

Have a scroll through this
It’s a idiots guide (no offence)

https://www.mgexp.com/phile/1/283532/SU_idiot_guide.PDF

[Mercmancdi]

Thank you