Have put 5 litres of old petrol in my XT660r(mixed up two canisters). It ran for a couple of hundred yards and then ground to a halt. I have syphoned the tank and I intend putting an additive and fresh super unleaded in to. Really dont want to have to access the fuel filter as I hear it's a pain and quite a delicate operation. Anyone with any experience of this on the XT. Any help appreciated.