RTO Mini Quads "stroke quad bike starting" Questions

...it up.we had it start up the day before. my 49cc 2 stroke quad wont start help quad bike 49 cc has no spark my 49 cc 4 stoke electic start quad starts but when i let go of the throttle it cuts ...

...stroke mini Harley motorcycle hi i have just brought a mini harley 49cc bike in red and black and dont have all the light the kill switch wire has been cut and on the brake leves not the brake ...

2002 kx 250 2 stroke wont start i was riding my 2002 kawsaki kx 250 2 stroke . it was running fine until i put some gas in it that my friend mixed, not sure how much oil was in the gas. anyways i rode