Thankyou for your answer to my original question-much appreciated. I neglected to add enough detail, so here goes! As stated in my last query about this noise, it occurred when my bike was started from cold outside temp. was approx. 20 degrees C, after being in a garage for approximately a week. I have started it many times from cold previously and had never heard the noise in the 4000kms I have ridden it, and have not heard it on the two occasions since, that I have started it from cold. I am a conservative rider, no wheelies, gunning the motor etc do not go over 70mph 125kph on the road and maintain the bike meticulously. The motor is an oil-cooled twin-cylinder with a total of 14000kms on the clock I bought it second-hand. A BMW mechanic told me that the bike can sit for some time without needing to have the motor turned over to get the oil moving around it, so I am thinking that lack of oil dispersion around the motor may not be the issue. It has a single-plate dry clutch. The noise was a 'clacking' sound, lasted 10 secs. and went away. It did not sound like a cam chain rattle, as I have heard that noise many times. The manual tells owners to not let the motor idle too long before riding it (enough time to put helmet and gloves on) and I follow this procedure. The gear shifting has not altered since the noise initially and it is decisive but a little clunky (this is the normal shifting sound apparently). Any suggestions? Thanks again
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