A Hundred Grand
4 solid years of campaigning various motorcycles in their native competition at the rate of about $20k/yr if you're on the budget plan. Then another $20k to set-up and execute one Baja race if you have lots of friends.
It's about the same budget as country club golf...
Straight ahead and faster -Bo Weaver 1970
"There I was..." -Griffin Niner Three Hotel
"One day closer to a parade..." Jonny Gomes, spring training 2013