I have a 2002 K1200LT. I noticed right after I bought it last summer, that there is a loud hum or groan harmonic type noise at highway speed whenever I lean into a turn, which seems to get louder the faster I travel or more I lean. I spoke with the mechanic at the BMW dealer where I bought the bike. He is also a KLT rider. He told me that it is a design issue with all KLT's that is somehow related to the tires. It is quieter with newer tires but all bikes, regardless of the brand or tires used, make this noise. I am reluctant to accept this explanation. Does anyone else notice a similar noise?