My X580 engine has around 90 hours on it and itís developed a miss. It only misses when itís hot and only when itís idled down. Not a horrible miss, but definitely a miss. Seems like the engine misses once every second or two. I changed the fuel filter and spark plugs. Engine oil looks good. Air filter looks good. Any ideas? I do have warranty, but it cost me for the transportation. If itís something simple, Iíd rather just take care of it. Thanks, guys.