Only once before, when the output shaft bearings failed. This will be the last time. Next time it's different engine/bike time. Still thinkin' about getting a 1st generation Valkyrie for long hauls. Don't trust this Rocket anymore. I will definitely trailer this one to RAA from now on. If it did shell off a circlip I'll definitely follow Mr' Lush's advice and have the gears under cut.