Just information. 2004 People 50-2 stroke. De-restricted, new belt, new tires, stock muffler replaced with same and weights replaced with Molossi 66 9823.NO 6HT Roll x 16x 13 gr.08 at 8,000 Km. Replaced belt again at 16,600 Km. and adjusted choke( never shutting off.) I have always used Motul 710 ester 2T 100 % Synthese motor oil. I ride it to work 5 days a week. The terrain is mostly hills( some steep. some gradual) with stretches of flat. I let it warm-up for about a minute in the morning. I can reach about 40 mph in the flat parts. On the steep portions(uphill) I slow down to about 25-30 mph. Down hill I reach 45 easily. I have had it up to 50 and I know it could get a little more. But, my mechanic told me not to push it. I don't "hot rod" it, but I do not "baby" it either. When I first had it, I went through a lot of spark plugs. I have now basically figured out how to throttle and extend the life of the plug. I keep the tires inflated to the proper pressure (25 in the front and 35 in the back.) I keep it maintained and as of today(19,260Km.), I get 71 mpg. It does the job for me.