you dont, drain the oil and start again
.7 L
40:1
KTM recommends Motorex Top Speed 4T15W50 for the 125SX.
the ratio is 50:1 on my ktm 125sx, for every gallon of gas you have, you need to use 2.56 oz of oil. i use Amsoil, its expensive, but its the best synthetic two stroke racing oil there is. the gas should be light pink if you mixed it correctly. hope this helps
0.7 liters engine oil using Motorex Top Speed 4T 15W50.
Hard to say, need more information. 2 stroke or 4 stroke and if it is a 2 stroke premix or gear oil.
You can find that info , as well as a lot more, here: http://motocross.transworld.net/2003/07/09/2004-ktm-125-sx-200-sx-250-sx-and-525-sx/
I personally use 32:1 of amsoil and regular unleaded gas for my ktm 125 sx 2003.
10w30 is what ktm recommend for a 2 stroke engine
40:1
60/40