Technical Backfire through carb

[Gunmetal]

Guys I need help I have a 1997 Uno 1.1. The car was standing for about 2 years. When I got it I replaced the module, plugs, rotor, dizzy Cap, fuel filter, oil filter and new oil. Timing is right on crank and cam but it back fires through the carb. I then removed the head to check all valve I then lapped all of them assembled the engine again and still backfires what can I do now???

 

[ZaphodB]

Static timing checked ....dynamic checked?

Check vacuum pipes are all connected in the right places and not perished/split.

 

[Gunmetal]

Static timing checked ....dynamic checked?

Check vacuum pipes are all connected in the right places and not perished/split.

Timing is 100% all vacuum pipes are new and in the right places...