So if I buy a less expensive $200 2-stroke, and then need to replace it three times, I end up with the same cost as a $600 4-stroke nice quiet system cost. Less the aggravation of break downs. Thinking of this a different way. If the bicycle is stolen, or damaged in an accident I am only out the $200 plus the bicycle cost. Yes I realize the market costs are all relative, and good quality costs cash. But three times as much? Comments?