you compress the forks and fill it up until it is 110mm from the top rim of the fork tube.
They have 293.20 cc.
they will run approxiamtley 102 mph...
650cc of 10w30
.7 L
125mm from the top edge of the fork without the spring and with the fork collapsed. Also the weight of the rider can change the oil height along with the riding style.
with a few small modifications up to 1998 will work but will need cdI unit with it
400cc 5wt fork oil
Fork oil level for a 2002 KTM 65 SX is 210 cc or 7.1 OZ per leg
250cc per fork
I have a KTM 300exc and when I had this problem my water pump seal had stARTED LEAKING CREATING PRESSURE IN CRANKCASE AND ADDING WATER TO OIL pushing oil out the vent. might check it... Bruce San Jose Calif
240 ML of 5w fork oil.
For the 2000 SX 400 KTM recommends SAE 10W-40 wt.; Capacity 1200cc See link below for technical specs.