Thanks, it's a lot easier on the bum and wrists too!
Check the choke cable and make sure it's pushing the slide back all the way, I just had this problem on mine and had to fix this problem the shop created when they reassembled. If the jetting hasn't changed then maybe the plugs are too cold a range or possibly just old? Could also be weak coils, I believe those were a common point of failure, although mine haven't given me any problems yet. *knock on wood*