I have a 2005 katana that runs like a top till today. I was riding to work going about 70 when all of a sudden it felt like i engaged the clutch but didnt and the rpm dropped to 0, about 3 seconds later they went right back to where it should be. The bike had not cut off because the oil light or nothing on the cluster showed. the bike has 20k miles and until now has run fantasticly well. am replacing the kick stand spring because it is rather loose, may not fix the issue but needs to be done. any ideas as to what it might be. keep in mind the bike idles and starts just fine.