RE: Motorcycles
Hi MustMoto!....Small/World, My oldest son (Eddie Warren) was on the "Kawasaki Pro Motocross Team" back in the mid 80's (Jeff Ward era)....I myself worked for "Harley Davidson" motor/co. Miwaukee (R&D) for awhile in the early 60's (before most of you/guys were born!)...I also built all of the "Flat/Track" equipment for the late Bart Markel (same era...you may have to resource the history/books to relate...hehe!)-In some ways this airplane thing is like the bikes...."Keep the rubber/side down!"....
Happy/Landings
Ed