With stock gearing around 60-65 MPH.
Stock gearing 72-75 mph
kx 125 is better because KTM 125 or any ktm snap so go with kx 125
I would go with the KTM, but if you do go with the DT, here is a website that helps derestrict the bike for better performance: http://www.dtr125.net/
Not too fast
Not as fast as a GSX-R1000
A ktm 65sx will go about 43 but with fmf pipes it will go close to 50
108.5mph
It can go 60 mph.
130mph
About 123.7 mph
70 stock
Very Slow! KTM's are NOT worth the money AT ALL!!