G'day good people . Just a quick heads up... whilst doing an oil and filers change I noticed one of the retaining bolts to the primary chain tensioner housing had taken extended leave. replaced it , and applied loctite to both. I imagine this housing is subject to slightly more and or a different harmonic of vibration on account of the tensioner contact and primary drive. the one remaining was slightly loose. Suggest checking may be in order . G5 , Dave , melbourne ,cheers.