Good to see another 550. I have the same model and colour. Mine was a US import 3 years ago and in much better condition. It showed 32k miles and all looked pretty straight and don't think the engine had been apart. I thought about getting it started, but after draining the oil and removing the sump the primary chain was chewing away at the cases so I decided not to bother and to completely strip. Only surprise was the upper rear engine bolt which took a week to remove. Managed to get a reasonable condition original silencer on ebay locally for a fiver! All back together now.