Not sure if this is the right section... After 25+ years of owning cars and bikes, I am no novice to detailing or bikes but my Yamaha XT660R has me slightly puzzled. For sure, it has been a long riding season with not much TLC but the dirt really seem to stick to this bike. Bought it new and have bern riding it since April, almost 100% paved roads. 3500 km so far. I have washed with my usual car wash, mild detergent, sponge and still the grime is in every spot unless I have REALLY scrubbed there. Stainless exhaust and cans look like concrete, engine block is all smudge (wording?) - even rims and frame were hard to get clean. My to other recent bikes (both bought new) Honda VT750C2 and Yamaha XJ6 were much easier to get clean. Is it an effect of cheaper paint and surface on the XT or is it the way the dirt spray up from the road on a dual sport? Something else?