I have 1992 K75RT bike. It sat unused for about 3 years. Started right up when I started riding it about a month ago. It idles fine. No problems. A little smoke when I start it up. But when I'm riding, it will stall out if I'm coasting with the clutch in. I've put some SeaFoam in the gas tank in an effort to try and clean up the fuel lines. Still happening. Any advice? Anyone else have this issue?