i got a 49cc +plus bike from Craigslist few weeks back and there was 1/4 tank of gas in it , now i don't know how long this gas been in there as now i only drove about 5 miles with it so far (due to sorting registration for it )now i found a bit of paper in a bag that the gentleman wrote on saying(( 7-17-2009 started 3rd gallon of gas @6oz to 1 gallon of gas odo mile was 197 miles ))i looked at 16/1 is 8oz of oil ???so what is 6oz even the 2 gallon gas can he gave me says 6oz to gallon on it ? and the odo meter now only reads 398 miles ,so in 4 years he drove just short of 200 miles so wonder if this is same gas or he not put much more in and if the gas been stood for a while saying that the bike runs jumpy to start it up then runs ok until i get to 23mpg then it seams its struggling to get power but then again i not took it out for long run , but hope that i will next week , i got some gas for a tiller @ 50/1mix can i put that in and see if it will run better or what do i been to check .and what does a 4 year old 49cc run like ???.