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Dremel makes a polishing wheel like a scuff pad. It is the perfect size to put the swearl pattern in the ports. Enlarging ports has also come into question. Seems you get more air fuel mix in the cylinder from high speed air through a small hole then when you in enlarge the hole. The air slows down with the larger port and less volume gets past the valve
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Top speed 123.369mph. Ohio mile
Worlds fastest 250 ninja
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