heyhey
Active member
I was wondering what the mixing ratio for a 2003 ktm 125sx because the guy I bought it off told me 40:1 so I called Royal just to be certain and they said 50:1.My friend has a mixing jug that has instructions how to mix 50:1 so that's what I have been doing but it feels like it is kind of bogging down and then this weekend I was riding and my bike just stalled and wouldn't start so when we got back I took out my spark plug and it was totally black.I would assume this is because I am using too much oil and the measuring jug is inaccurate does anyone know what's wrong?