Needs a new clutch
There is no fuel/oil ratio, the 03 KTM 450 EXC is a four stroke. See link below.
2006 KTM 125 EXC Seat height 36.4 inches Ground clearance 15.4 inches Front suspension travel 11.8 inches Rear suspension travel 13.2 inches
.7 L
NIB Exc V.G. Good Fair Poor 150 125 100 85 75 50
Electrical Short. Pinch wire. Grounded Wire. exc.
It will shut off, run like it's running out of gas, will damage fuel injector, fuel finter, coil packs, exc.
The fuel pump may not be pumping fuel up fast enough. Have your fuel pump pressure tested. Change fuel filter, exc.
Manufactured between 1969 and 1976 Standard grade poor - 125 good - 250 Exc - 350 Competition poor - 175 good - 300 Exc - 400 This from a 2002 gun values book. Present values will be slightly higher
With supermotard tyres about 120-135 km/h. It depends on riders weight, wind, tyre pressures and how fresh your piston is.
B IS 1950 VALUE IS GD 75, VG 100, EXC 125 HOPE THIS HELPED
exc satands for excelent x caty