i am new trying to get 77 cb 750 running right .bike seems to have eletrical problems .bought last year ran good until october.would take long time to warm up then run fine. this year new plugs airfilter oilchange carbs cleaned out.notice that cyleder 1and 4 had spark 2and 3 no spark.changed wires to coil from dyna eletronic system. when i swicthed the coil wires one to the other coil 1 and 4 did not fire but 2 and 3 did fire. also seems to rev up and down almost like the other carb would kick in. any help thanks deadman

