have an 88 goldwing with misfiring problems. didnt know any history on bike when wife bought it for my 60th birthday. since then i have replaced timing belts, coils, pulse generators, plugs and wires, had carbs rebuilt with new vacuum lines. right now it fires right up and idles, but under load, backfires out right exhaust. seems like 2 cylinders on right side are not firing in sequence. could the ecm be bad? dont have much more hair to pull out. any info would be much appreciated.