This would depend on what type of oil you will be using for your premix. The oil base stock is either petroleum, semi-synthetic or synthetic oil and is mixed with gas at a ratio ranging from 16:1 (petroleum) to as high as 100:1 (synthetic). My 2 stroke I have is a 2001 Kawasaki KDX200 that I run Yamalube 2R at 36:1 with no problems. Although synthetics say you can mix them at 100:1 I would not, that seems way too lean to me.
No, you have to premix
Rent a Ktm Bike with endurobikes.co
40:1
50:1
40:1 is a good mixture.
32:1.
Can't find anything online that far back, you will need to check with your local KTM shop.
gas oil ratio for 1994 ktm 50 junior
yes there is the ktm ktm 85 ktm 110 ktm 125 ktm 150 ktm 250 ktm 500
40:1, I run Maxima 2-stroke oil and that works awesome
40:1 stock ratio to run richer if plug tends to foul 32:1
2009 KTM 250SX retail price $6598