Have you ever slipstreamed behind a lorry on the motorway?
I used to do this on my 250 wet dream until one day all my black leathers and visor went a mustard colour, so I dropped back and overtook the lorry only to find it was a cattle truck and I was covered in p*ss & s*it![]
Used to on my CB100N. The I would pop out to overtake a 55mph lorry at 57 mph only to hit the bow wave of air from around the cab, and then start to loose ground!