No lower then 50:1 and no higher then 28:1. It depends on how fast you are, but the quicker you are, the higher the oil ratio you can run. I run 32:1 on my 125's and 144's, works great. I use Maxima Castor 927, its a great non-synthetic oil which works great. It has the same wear characteristics as castor, but without the side-effects.
Gas / Oil Premix Fuel Requirements Fuel Capacity (gal/l) 1.3 / 5 2020 KTM SX 125. $7,299 MSRP. 2020 KTM SX 450 F. $9,999 MSRP. 2020 KTM SX 350 F. $9,799 MSRP
Loosen the top yoke pinch bolts, loosen fork cap, then loosen bottom yoke pinch bolts. Easiest way to strip them is to press hard on the upside down leg while taking out the base (compression) valve from the bottom, undo the top cap and pull the whole cartridge out. Stand that in a bown to drain while you change the seals, then rebuild and pour
BiSj.