Motor sounds OK and up to now sounds well and runs/starts well carbs recently refurbished. I'll take your advice on oil usage. Any other way of checking the serviceability of the valve stem seals? Apparently 84,000k's was recently on VJMC club plates until I bought it. Blue slipped in NSW and am waiting on my YAM81 plates to arrive, a bit naff but I love it. I'll try and check the owners based on engine/frame numbers which match (I'm assured this is a good thing!).