THe air-cooled bikes are less time-consuming and a bit easier than the ones with full fairings. If my M620 got really dirty I didn't have any problems using a water hose and a bucket of soapy water and soft bristled brush (don't try it on a hot sunny day because you can't get the water off fast enough without it leaving spots). Same is true now with the Speedamaster. Water hose, bucket, Dawn liquid dish washing soap and plenty of microfiber towels. A fresh coat of quality wax and you're good to go
