Back in April when I purchased my 109, the service department told me that amsoil is not good for the size of engine on this bike. They said although it is good to the engine that it is bad for the clutch system. Is anyone out there currently running amsoil? I run amsoil in all vehicles and am very pleased to say that the oil in my vehciles and old bike stay cleaner longer. Just curious if there is any truth to what they told me or if they were feeding me a line of B.S.