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If your smoking black then you need more air. Both in and out. Get you some metric all thread cut two pieces a little longer that the original intake to air clearer studs. Swap them out and turn tha air cleaner lid upside down. It will get all the air it wants. The engine roar will get...

You can drill holes in the air clearer can. It's starving for air. It will make a noticable difference. But not much. It also makes that engine roar much louder. You can also install a 2 1/2 inch dual exaust. That made another noticable difference on my 1028. And last but not least you can turn...