i just love to see aluminum fly off that carbide bit. got me a 40 yamaha with 50 hp carbs and 50 hp exhaust tuner got to have more hp . do I just clean up the ports over hang , or do I cut to the sleeve i know not to cut much off the exhaust hight like 15 thousants or do you just leave it stock hight please help hey FAST FRED DO I HAVE TO WELD THE CRANK ON A YAMMY LIKE A TATSU CAUSE I CUT THAT THERE GRAY WIRE AWILE BACK. ANY HELP FROM YOU GUYS WOULD BE GREAT