Several schools of thinking here. Many opt to stay with exactly what the engineers at Suzuki designed. Others feel the need to make a good thing better, and the intake tinkering can go from mildly tweaking the stock CV carb to opening up the airbox and/or switching to a flatslide pumper. And if you're so inclined, do-it-yourself fuel injection is on the horizon, thanks largely to the relentless efforts of mx_rob. Intake-wise, what's worked for you? -AIRBOX MODIFICATION -AIR FILTERS -STOCK CARBURETOR [MIKUNI BST40] MODIFICATION -MIKUNI TM-40 [HSR-40] -KEIHIN FCR39-MX -FUEL INJECTION?