recently purchased a 99dr650 with a 2009 dr650 motor. I took the bike apart to wire the rear blinkers and noticed sloshing in the gas tank. I emptied the gas and found crystals around the rim of the tank after i emptied it. I also put a magnet in the tank to see if there was rust in there and the magnet came out covered in crystals as well. Being curious i tasted the crystals and sure enough they were sweet, definitely sugar. I rinsed the tank out several times with hot water to dissolve the sugar and then took the float bowl off the carb and it looked pretty clean. I asked the guy i bought it from about the sugar and he said he had no idea and that sugar will dissolve in gas. Having a good knowledge of chemistry i know that sugar doesn't dissolve in gas and thats why people put it in your tank to mess everything up. I am not sure as to what the sugar would do if it made it into the engine? or if since there wasn't any in the float bowl should i tear the engine apart?