For the 2000 SX 400 KTM recommends SAE 10W-40 wt.; Capacity 1200cc See link below for technical specs.
KTM
Motorex, SAE 15W-50
Get a KTM
ktm
Dirt Rider magazine said that the dirt bike of the year was, KTM 350 SX-F
you don't!!
Ktm 125sx
They are quicker and more powerful and are like the Ferrari of the dirt bikes and are built for speed and racing and the Honda is like the Holden and Ford and is a basic dirt bike!
I have a ktm dirt bike trying to find out the year the number is ktm8701*45853*
go to the KTM website. google it " ktm ", they have some odd stuff.
KTM!!!
either a kawasaki ktm Yamaha Honda