hi everyone. i'm new to this forum. working on an 88 ezgo 2 stroke for my sister in law. it won't rev very hi. i've found that trying different plugs and changing the gap has made it better. can someone tell me what plug it should have and what the gap should be. i've heard NGK is best but i don't know specifically what plug to use. the cart has had extensive repairs recently. engine complete rebuild, carb clean, new fuel pump, HEI ignition in place of factory ignitor that wasn't working, cleaned muffler. I'm sure there is more that i'm forgetting at the moment. we've been messing with this thing for a couple months now. thanks for the help.