I recently installed a new set of NGK plugs in my GS-R, and the suggested spark plug gap is 1.3mm give or take .1mm. As much as I tried to get the feeler gauge to widen the gap on the plugs, I couldn't get the plug tip to go any further than 1.1mm. What are the side effects of this?

 

I'm running ngk plugs that are gapped to 1.1 mm right now in my gs-r, and I haven't felt any difference at all between that and the 1.3 mm gap that I ran before.