"but if you are in a sand pit, in the middle of the woods or nowhere close to a neighborhood and especially a place specifically made for riding like at a motocross track, noise should not be an issue at all"
Fully agree. The sound of a Formula 1 race car makes my hair stand on end.
This was a really great thread, lots of good points. I'm still keeping my fingers crossed that Apple will come out with the "iBike" which looks exactly like the WR250R (probably in all white), wieghs 100 pounds, with active electromagnetic suspension, and has a range of 60,000 miles before you need to replace the small AA battery sized fusion reactor cylinder and has a motor with 100hp. Oh, and throw in some carbon fiber knobbies that never wear out and that transform into racing slicks on pavement...