Stock gearing 72-75 mph
stock around about 140-150 tuned about 170-175
With stock gearing around 60-65 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